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general description the max2828/max2829 single-chip, rf transceiver ics are designed specifically for ofdm 802.11 wlan appli- cations. the max2828 is designed for single-band 802.11a applications covering world-band frequencies of 4.9ghz to 5.875ghz. the max2829 is designed for dual-band 802.11a/g applications covering world-bands of 2.4ghz to 2.5ghz and 4.9ghz to 5.875ghz. the ics include all circuitry required to implement the rf trans- ceiver function, providing a fully integrated receive path, transmit path, vco, frequency synthesizer, and base- band/control interface. only the pa, rf switches, rf bandpass filters (bpf), rf baluns, and a small number of passive components are needed to form the com- plete rf front-end solution. each ic completely eliminates the need for external saw filters by implementing on-chip monolithic filters for both the receiver and transmitter. the baseband filtering and the rx/tx signal paths are optimized to meet the 802.11a/g ieee standards and cover the full range of the required data rates (6, 9, 12, 18, 24, 36, 48, and 54mbps for ofdm; 1, 2, 5.5, and 11mbps for cck/dsss), at receiver sensitivity levels up to 10db better than 802.11a/g standards. the max2828/max2829 transceivers are avail- able in the small 56-pin, exposed paddle thin qfn pack- age. applications single-/dual-band 802.11a/b/g radios 4.9ghz public safety radios 2.4ghz/5ghz mimo and smart antenna systems features world-band operation max2828: 4.9ghz to 5.875ghz (802.11a) max2829: 2.4ghz to 2.5ghz and 4.9ghz to 5.875ghz (802.11a/b/g) best-in-class transceiver performance -75dbm rx sensitivity at 54mbps (802.11g) -46db (802.11g)/-51db (802.11a) tx sideband suppression 1.5% (802.11g) and 2% (802.11a) tx evm -100dbc/hz (802.11g)/-95dbc/hz (802.11a) lo phase noise programmable baseband lowpass filters integrated pll with 3-wire serial interface 93db (802.11g)/97db (802.11a) receiver gain- control range 200ns rx i/q dc settling 60db dynamic range rx rssi 30db tx power-control range tx/rx i/q error detection i/q analog baseband interface for tx and rx digital mode selection (tx, rx, standby, and power down) supports both serial and parallel gain control mimo and smart antenna compatibility coherent lo phase among multiple transceivers support 40mhz channel bandwidth (turbo mode) single +2.7v to +3.6v supply 1? low-power shutdown mode small 56-pin tqfn package (8mm x 8mm) max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics ________________________________________________________________ maxim integrated products 1 2 1 3 4 5 6 7 8 b6 top view v cc v cc b7 n.c. n.c. n.c. gnd rxrfh gnd txrfh+ b2 gnd b4 v cc v cc v cc v cc b5 b3 9 txrfh- txena pabias v cc v cc v cc v cc txbbi+ txbbi- txbbq+ txbbq- r bias v ref gnd din sclk rxena rxhp rssi v cc v cc bypass gnd gnd cpout gnd rosc ld b1 rxbbi+ rxbbi- rxbbq+ rxbbq- 10 11 12 13 15 16 17 18 19 20 14 21 22 23 24 25 26 27 28 29 33 32 31 34 35 36 37 38 39 40 41 42 55 54 53 52 51 50 49 48 47 46 45 44 43 56 30 tune cs max2828 shdn pin configurations ordering information 19-3455; rev 0; 10/04 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. * ep = exposed paddle. evaluation kit available part temp range pin-package max2828 etn -40c to +85c 56 tqfn-ep* (t5688-2) max2829 etn -40c to +85? 56 tqfn-ep* (t5688-2) pin configurations continued at end of data sheet.
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 2 _______________________________________________________________________________________ absolute maximum ratings stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. v cc , txrfh_, txrfl_ to gnd..............................-0.3v to +4.2v rxrfh, rxrfl, txbbi_, txbbq_, rosc, rxbbi_, rxbbq_, rssi, pabias, v ref , cpout, rxena, txena, shdn , cs , sclk, din, b_, rxhp, ld, r bias , bypass to gnd ....................................-0.3v to (v cc + 0.3v) rxbbi_, rxbbq_, rssi, pabias, v ref , cpout, ld short-circuit duration...................................................10s rf input power ...............................................................+10dbm continuous power dissipation (t a = +70?) 56-pin thin qfn (derate 31.3mw/? above +70?)....2500mw operating temperature range ...........................-40? to +85? junction temperature ......................................................+150? storage temperature range .............................-65? to +160? lead temperature (soldering, 10s) .................................+300? dc electrical characteristics (max2828/max2829 evaluation kits: v cc = 2.7v to 3.6v, rx/tx set to maximum gain, r bias = 11k ? , no signal at rf inputs, all rf inputs and outputs terminated into 50 ? , receiver baseband outputs are open, no signal applied to tx i/q bb inputs in tx mode, f refosc = 40mhz, registers set to default settings and corresponding test mode, t a = -40? to +85?, unless otherwise noted. typical values are at v cc = +2.7v and t a = +25?, unless otherwise noted.) (note 1) parameters conditions min typ max units supply voltage 2.7 3.6 v shutdown mode, reference oscillator not applied, v il = 0 1 100 a t a = +25 c3747 802.11g max2829 t a = -40 c to +85 c 51 t a = +25 c4451 standby mode 802.11a max2828/max2829 t a = -40 c to +85 c 55 t a = +25 c 118 151 802.11g max2829 t a = -40 c to +85 c 158 t a = +25 c 135 180 rx mode 802.11a max2828/max2829 t a = -40 c to +85 c 188 t a = +25 c 124 164 802.11g max2829 t a = -40 c to +85 c 175 t a = +25 c 142 184 tx mode 802.11a max2828/max2829 t a = -40 c to +85 c 197 802.11g max2829 t a = +25 c65 standby mode (mimo) (note 2) 802.11a max2828/max2829 t a = +25 c70 802.11g max2829 t a = +25 c 136 rx mode (mimo) (note 2) 802.11a max2828/max2829 t a = +25 c 154 802.11g max2829 t a = +25 c 139 tx mode (mimo) (note 2) 802.11a max2828/max2829 t a = +25 c 157 802.11g max2829 129 tx calibration mode, t a = +25 c 802.11a max2828/max2829 147 802.11g max2829 188 supply current rx calibration mode, t a = +25 c 802.11a max2828/max2829 210 ma rx i/q output common-mode voltage t a = +25 c 0.80 0.9 1.05 v caution! esd sensitive device
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics _______________________________________________________________________________________ 3 ac electrical characteristics?02.11g rx mode (max2829) (max2829 evaluation kit: v cc = +2.7v, f in = 2.437ghz; receiver baseband i/q outputs at 112mv rms (-19dbv), f refosc = 40mhz, shdn = rxena = cs = high, rxhp = txena = sclk = din = low, r bias = 11k ? , registers set to default settings and correspond- ing test mode, t a = +25 c, unless otherwise noted. unmodulated single-tone rf input signal is used, unless otherwise indicated.) (tables 1, 2, 3) parameter conditions min typ max units receiver section: lna rf input to baseband i/q outputs rf input frequency range 2.412 2.500 ghz lna high-gain mode (b7:b6 = 11) -22 lna medium-gain mode (b7:b6 = 10) -24 rf input return loss with 50 ? external match lna low-gain mode (b7:b6 = 0x) -12 db t a = +25 c8794 maximum gain, b7:b1 = 1111111 t a = -40 c to +85 c (note 1) 85 total voltage gain minimum gain, b7:b1 = 0000000 t a = +25 c1 5.5 db from high-gain mode (b7:b6 = 11) to medium-gain mode (b7:b6 = 10) (note 3) -15.5 rf gain steps from high-gain mode (b7:b6 = 11) to low-gain mode (b7:b6 = 0x) (note 3) -30.5 db gain variation over rf band f rf = 2.412ghz to 2.5ghz 3 db baseband gain range from maximum baseband gain (b5:b1 = 11111) to minimum baseband gain (b5:b1 = 00000) 62 db dc electrical characteristics (continued) (max2828/max2829 evaluation kits: v cc = 2.7v to 3.6v, rx/tx set to maximum gain, r bias = 11k ? , no signal at rf inputs, all rf inputs and outputs terminated into 50 ? , receiver baseband outputs are open, no signal applied to tx i/q bb inputs in tx mode, f refosc = 40mhz, registers set to default settings and corresponding test mode, t a = -40 c to +85 c, unless otherwise noted. typical values are at v cc = +2.7v and t a = +25 c, unless otherwise noted.) (note 1) parameters conditions min typ max units t a = -40 c (relative to +25 c) -25 rx i/q output common-mode voltage variation t a = +85 c (relative to +25 c) 20 mv tx baseband input common- mode voltage operating range 0.9 1.3 v tx baseband input bias current 13 a reference voltage output -1ma < i out < +1ma 1.2 v digital input-voltage high, v ih v cc - 0.4 v digital input-voltage low, v il 0.4 v digital input-current high, i ih -1 +1 a digital input-current low, i il -1 +1 a ld output-voltage high, v oh sourcing 100a v cc - 0.4 v ld output-voltage low, v ol sinking 100a 0.4 v
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 4 _______________________________________________________________________________________ ac electrical characteristics 802.11g rx mode (max2829) (continued) (max2829 evaluation kit: v cc = +2.7v, f in = 2.437ghz; receiver baseband i/q outputs at 112mv rms (-19dbv), f refosc = 40mhz, shdn = rxena = cs = high, rxhp = txena = sclk = din = low, r bias = 11k ? , registers set to default settings and correspond- ing test mode, t a = +25 c, unless otherwise noted. unmodulated single-tone rf input signal is used, unless otherwise indicated.) (tables 1, 2, 3) parameter conditions min typ max units voltage gain 65db, with b7:b6 = 11 3.5 voltage gain = 50db, with b7:b6 = 11 4 voltage gain = 45db, with b7:b6 = 10 16 dsb noise figure voltage gain = 15db, with b7:b6 = 0x 36 db output p-1 db voltage gain = 90db, with b7:b6 = 11 3.2 v p-p voltage gain = 60db, with b7:b6 = 11 -10 voltage gain = 45db, with b7:b6 = 10 -2 out-of-band input ip3 -35dbm jammers at 40mhz and 78mhz offset; based on im3 at 2mhz voltage gain = 40db, with b7:b6 = 0x 21 dbm voltage gain = 40db, with b7:b6 = 11 -29 voltage gain = 25db, with b7:b6 = 10 -14 in-band input p-1 db voltage gain = 5db, with b7:b6 = 0x 2 dbm voltage gain = 40db, with b7:b6 = 11 -17 voltage gain = 25db, with b7:b6 = 10 -5 in-band input ip3 tones at 7mhz and 8mhz, im3 at 6mhz and 9mhz, p in = -40dbm per tone voltage gain = 5db, with b7:b6 = 0x 14 dbm i/q phase error b7:b1 = 1101110, 1 variation 0.5 degrees i/q gain imbalance b7:b1 = 1101110, 1 variation 0.1 db tx-to-rx conversion gain for rx i/q calibration b7:b1 = 0010101 (note 4) -4 db i/q static dc offset rxhp = 1, b7:b1 = 1101110, 1 variation 2mv i/q dc droop after switching rxhp to 0, d2 = 0 (see the rx control/rssi register definition section) 1 mv/ms rf gain-change settling time gain change from high gain to medium gain, high gain to low gain, or medium gain to low gain; gain settling to within 2db of steady state 0.4 s baseband vga settling time gain change from b5:b1 = 10111 to b5:b1 = 00111; gain settling to within 2db of steady state 0.1 s minimum differential resistance 10 k ? rx i/q output load impedance maximum differential capacitance 8 pf spurious signal emissions at lna input rf = 1ghz to 26.5ghz -67 dbm
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics _______________________________________________________________________________________ 5 ac electrical characteristics 802.11g rx mode (max2829) (continued) (max2829 evaluation kit: v cc = +2.7v, f in = 2.437ghz; receiver baseband i/q outputs at 112mv rms (-19dbv), f refosc = 40mhz, shdn = rxena = cs = high, rxhp = txena = sclk = din = low, r bias = 11k ? , registers set to default settings and correspond- ing test mode, t a = +25 c, unless otherwise noted. unmodulated single-tone rf input signal is used, unless otherwise indicated.) (tables 1, 2, 3) parameter conditions min typ max units receiver baseband filters narrowband mode 7.5 nominal mode 9.5 turbo mode 1 14 baseband -3db corner frequency (see the lowpass filter register section) turbo mode 2 18 mhz f baseband = 15mhz 20 f baseband = 20mhz 39 baseband filter rejection (nominal mode) f baseband > 40mhz 84 db rssi rxhp = 1, low range (d11 = 0, see the rx control/rssi register definition section) 0.5 rssi minimum output voltage rxhp = 1, high range (d11 = 1, see the rx control/rssi register definition section) 0.52 v rxhp = 1, low range (d11 = 0, see the rx control/rssi register definition section) 2 rssi maximum output voltage rxhp = 1, high range (d11 = 1, see the rx control/rssi register definition section) 2.5 v rxhp = 1, low range (d11 = 0, see the rx control/rssi register definition section) 22.5 rssi slope rxhp = 1, high range (d11 = 1, see the rx control/rssi register definition section) 30 mv/db +40db signal step 0.2 rssi output settling time to within 3db of steady state -40db signal step 0.7 s
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 6 _______________________________________________________________________________________ ac electrical characteristics 802.11a rx mode (max2828/max2829) (max2828/max2829 evaluation kits: v cc = +2.7v, f in = 5.25ghz; receiver baseband i/q outputs at 112mv rms (-19dbv), f refosc = 40mhz, shdn = rxena = cs = high, rxhp = txena = sclk = din = low, r bias = 11k ? , registers set to default settings and cor- responding test mode, t a = +25 c, unless otherwise noted. unmodulated single-tone rf input signal is used, unless otherwise indi- cated.) (tables 1, 2, 3) parameter conditions min typ max units receiver section: lna rf input to baseband i/q outputs 802.11a low-band mode 4.900 5.350 rf input frequency range 802.11a high-band mode 5.470 5.875 ghz lna high-gain mode (b7:b6 = 11) -15 lna medium-gain mode (b7:b6 = 10) -11 rf input return loss with 50 ? external match lna low-gain mode (b7:b6 = 0x) -7 db t a = +25 c9197 maximum gain, b7:b1 = 1111111 t a = -40 c to +85 c (note 1) 88 total voltage gain minimum gain, b7:b1 = 0000000 t a = +25 c03 db from high-gain mode (b7:b6 = 11) to medium-gain mode (b7:b6 = 10) (note 3) -19 rf gain steps from high-gain mode (b7:b6 = 11) to low-gain mode (b7:b6 = 0x) (note 3) -34.5 db f rf = 4.9ghz -0.3 f rf = 5.35ghz 0.4 gain variation relative to 5.25ghz f rf = 5.875ghz -4 db baseband gain range from maximum baseband gain (b5:b1 = 11111) to minimum baseband gain (b5:b1 = 00000) 62 db voltage gain 65db, with b7:b6 = 11 4.5 voltage gain = 50db, with b7:b6 = 11 4.8 voltage gain = 45db, with b7:b6 = 10 15 dsb noise figure voltage gain = 15db, with b7:b6 = 0x 36 db output p-1 db voltage gain = 90db, with b7:b6 = 11 3.2 v p-p voltage gain = 60db, with b7:b6 = 11 -15 voltage gain = 45db, with b7:b6 = 10 0.5 out-of-band input ip3 -35dbm jammers at 40mhz and 78mhz offset; based on im3 at 2mhz voltage gain = 40db, with b7:b6 = 0x 20 dbm voltage gain = 35db, with b7:b6 = 11 -32 voltage gain = 20db, with b7:b6 = 10 -12 in-band input p-1 db voltage gain = 5db, with b7:b6 = 0x 3 dbm
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics _______________________________________________________________________________________ 7 ac electrical characteristics 802.11a rx mode (max2828/max2829) (continued) (max2828/max2829 evaluation kits: v cc = +2.7v, f in = 5.25ghz; receiver baseband i/q outputs at 112mv rms (-19dbv), f refosc = 40mhz, shdn = rxena = cs = high, rxhp = txena = sclk = din = low, r bias = 11k ? , registers set to default settings and cor- responding test mode, t a = +25 c, unless otherwise noted. unmodulated single-tone rf input signal is used, unless otherwise indi- cated.) (tables 1, 2, 3) parameter conditions min typ max units voltage gain = 35db, with b7:b6 = 11 -24 voltage gain = 20db, with b7:b6 = 10 -5 in-band input ip3 tones at 7mhz and 8mhz, im3 at 6mhz and 9mhz, p in = -40dbm per tone voltage gain = 5db, with b7:b6 = 0x 13 dbm i/q phase error b7:b1 = 1101110, 1 variation 0.4 degrees i/q gain imbalance b7:b1 = 1101110, 1 variation 0.1 db tx-to-rx conversion gain for rx i/q calibration b7:b1 = 0001111 (note 4) 0 db i/q static dc offset rxhp = 1, b7:b1 = 1101110, 1 variation 2mv i/q dc droop after switching rxhp to 0, d2 = 0 (see the rx control/rssi register definition section) 1 mv/ms rf gain-change settling time gain change from high gain to medium gain, high gain to low gain, or medium gain to low gain; gain settling to within 2db of steady state 0.4 s baseband vga settling time gain change from b5:b1 = 10111 to b5:b1 = 00111; gain settling to within 2db of steady state 0.1 s minimum differential resistance 10 k ? rx i/q output load impedance maximum differential capacitance 8 pf spurious signal emissions at lna input rf = 1ghz to 26.5ghz -50 dbm receiver baseband filters narrow-band mode 7.5 nominal mode 9.5 turbo mode 1 14 baseband -3db corner frequency (see the lowpass filter register definition section) turbo mode 2 18 mhz f baseband = 15mhz 20 f baseband = 20mhz 39 baseband filter rejection (nominal mode) f baseband > 40mhz 80 db
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 8 _______________________________________________________________________________________ ac electrical characteristics 802.11a rx mode (max2828/max2829) (continued) (max2828/max2829 evaluation kits: v cc = +2.7v, f in = 5.25ghz; receiver baseband i/q outputs at 112mv rms (-19dbv), f refosc = 40mhz, shdn = rxena = cs = high, rxhp = txena = sclk = din = low, r bias = 11k ? , registers set to default settings and cor- responding test mode, t a = +25 c, unless otherwise noted. unmodulated single-tone rf input signal is used, unless otherwise indi- cated.) (tables 1, 2, 3) parameter conditions min typ max units rssi rxhp = 1, low range (d11 = 0, see the rx control/rssi register definition section) 0.5 rssi minimum output voltage rxhp = 1, high range (d11 = 1, see the rx control/rssi register definition section) 0.52 v rxhp = 1, low range (d11 = 0, see the rx control/rssi register definition section) 2 rssi maximum output voltage rxhp = 1, high range (d11 = 1, see the rx control/rssi register definition section) 2.5 v rxhp = 1, low range (d11 = 0, see the rx control/rssi register definition section) 22.5 rssi slope rxhp = 1, high range (d11 = 1, see the rx control/rssi register definition section) 30 mv/db +40db signal step 0.2 rssi output settling time to within 3db of steady state -40db signal step 0.7 s ac electrical characteristics 802.11g tx mode (max2829) (max2829 evaluation kit: v cc = +2.7v, f out = 2.437ghz, f refosc = 40mhz, shdn = txena = cs = high, rxena = sclk = din = low, r bias = 11k ? , 100mv rms sine and cosine signal (or 100mv rms , 54mbps ieee 802.11g i/q signals wherever ofdm is men- tioned) applied to baseband i/q inputs of transmitter, registers set to default settings and corresponding test mode, t a = +25 c, unless otherwise noted.) (table 4) parameter conditions min typ max units transmit section: tx baseband i/q inputs to rf outputs rf output frequency range, f rf 2.412 2.500 ghz 1.5% evm -2.5 output power 54mbps 802.11g ofdm signal b6:b1 = 111011 -4.5 dbm output power (cw) v in = 100mv rms at 1mhz i/q cw signal, b6:b1 = 111111 -2 dbm output power range b6:b1 = 111111 to b6:b1 = 000000 30 db carrier leakage without dc offset cancellation -27 dbc unwanted sideband suppression uncalibrated -46 dbc tx output acp measured with 1mhz resolution bandwidth at 22mhz offset from channel center (b6:b1 = 111011), ofdm signal -69 dbm/ mhz rf output return loss with external 50 ? match -14 db
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics _______________________________________________________________________________________ 9 ac electrical characteristics 802.11g tx mode (max2829) (continued) (max2829 evaluation kit: v cc = +2.7v, f out = 2.437ghz, f refosc = 40mhz, shdn = txena = cs = high, rxena = sclk = din = low, r bias = 11k ? , 100mv rms sine and cosine signal (or 100mv rms , 54mbps ieee 802.11g i/q signals wherever ofdm is men- tioned) applied to baseband i/q inputs of transmitter, registers set to default settings and corresponding test mode, t a = +25 c, unless otherwise noted.) (table 4) parameter conditions min typ max units 2/3 x f rf -64 4/3 x f rf -61 5/3 x f rf -63 rf spurious signal emissions b6:b1 = 111011, ofdm signal 8/3 x f rf -52 dbm/ mhz nominal mode 12 turbo mode 1 18 baseband -3db corner frequency (see the lowpass filter register definition section) turbo mode 2 24 mhz baseband filter rejection at 30mhz, in nominal mode (see the lowpass filter register definition section) 60 db minimum differential resistance 60 k ? tx baseband input impedance maximum differential capacitance 0.7 pf transmitter lo leakage and i/q calibration using lo leakage and sideband detector (see the tx/rx calibration mode section) tx baseband i/q inputs to receiver outputs output at 1 x f tone (for lo leakage = -29dbc), f tone = 2mhz, 100mv rms -3 lo leakage and sideband- detector output calibration register, d12:d11 = 11, a3:a0 = 0110 output at 2 x f tone (for sideband suppression = -40dbc), f tone = 2mhz, 100mv rms -13 dbv rms amplifier gain range d12:d11 = 00 to d12:d11 = 11, a3:a0 = 0110 26 db lower -3db corner frequency 1 mhz
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 10 ______________________________________________________________________________________ ac electrical characteristics 802.11a tx mode (max2828/max2829) (max2828/max2829 evaluation kits: v cc = +2.7v, f out = 5.25ghz, f refosc = 40mhz, shdn = txena = cs = high, rxena = sclk = din = low, r bias = 11k ? , 100mv rms sine and cosine signal (or 100mv rms , 54mbps ieee 802.11a i/q signals wherever ofdm is mentioned) applied to baseband i/q inputs of transmitter, registers set to default settings and corresponding test mode, t a = +25 c, unless otherwise noted.) (table 4) parameter conditions min typ max units transmit section: tx baseband i/q inputs to rf outputs 802.11a low-band mode 4.900 5.350 rf output frequency range, f rf 802.11a high-band mode 5.470 5.875 ghz 2% evm -5 output power 54mbps 802.11a ofdm signal b6:b1 = 111100 -6.5 dbm output power (cw) v in = 100mv rms at 1mhz i/q cw signal, b6:b1 = 111111 -4.5 dbm f rf = 4.9ghz -6 f rf = 5.35ghz -0.5 output power variation relative to 5.25ghz f rf = 5.875ghz -1 db output power range b6:b1 = 111111 to b6:b1 = 000000 30 db carrier leakage without dc offset cancellation -27 dbc unwanted sideband suppression uncalibrated -51 dbc tx output acp measured with 1mhz resolution bandwidth at 30mhz offset from channel center (b6:b1 = 111100), ofdm signal -80 dbm/ mhz rf output return loss with external 50 ? match -16 db 4/5 x f rf -55 6/5 x f rf -64 7/5 x f rf -65 rf spurious signal emissions b6:b1 = 111100, ofdm signal 8/5 x f rf -49 dbm/ mhz nominal mode 12 turbo mode 1 18 baseband -3db corner frequency (see the lowpass filter register definition section) turbo mode 2 24 mhz baseband filter rejection at 30mhz, in nominal mode (see the lowpass filter register definition section) 60 db minimum differential resistance 60 k ? tx baseband input impedance maximum differential capacitance 0.7 pf transmitter lo leakage and i/q calibration using lo leakage and sideband detector (see the tx/rx calibration mode section) tx baseband i/q inputs to receiver outputs output at 1 x f tone (for lo leakage = -29dbc), f tone = 2mhz, 100mv rms -4.5 lo leakage and sideband- detector output calibration register, d12:d11 = 1, a3:a0 = 0110 output at 2 x f tone (for sideband suppression = -40dbc), f tone = 2mhz, 100mv rms -14.5 dbv rms amplifier gain range d12:d11 = 00 to d12:d11 = 11, a3:a0 = 0110 26 db lower -3db corner frequency 1 mhz
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics ______________________________________________________________________________________ 11 ac electrical characteristics frequency synthesis (max2828/max2829 evaluation kits: v cc = +2.7v, f rf = 2.437ghz (802.11g) or f rf = 5.25ghz (802.11a), f refosc = 40mhz, shdn = cs = high, sclk = din = low, pll loop bandwidth = 150khz, r bias = 11k ? , t a = +25 c, unless otherwise noted.) parameter conditions min typ max units frequency synthesizer 802.11g mode 2412 2500 802.11a low-band mode 4900 5350 rf channel center frequency 802.11a high-band mode 5470 5875 mhz charge-pump comparison frequency 20 mhz f refosc input frequency 20 44 mhz reference-divider ratio 14 f refosc input levels ac-coupled 800 mv p-p f refosc input impedance 10 k ? f offset = 1khz -87 f offset = 10khz -103 f offset = 100khz -99 f offset = 1mhz -112 802.11g f offset = 10mhz -125 f offset = 1khz -84 f offset = 10khz -95 f offset = 100khz -92 f offset = 1mhz -108 closed-loop phase noise 802.11a f offset = 10mhz -124 dbc/hz 802.11g 0.6 closed-loop integrated phase noise rms phase jitter, integrate from 10khz to 10mhz offset 802.11a 1 d eg r ees charge-pump output current 4ma charge-pump output voltage >70% of i cp 0.5 v cc - 0.5v v 802.11g -65 reference spurs 20mhz offset 802.11a -58 dbc voltage-controlled oscillator vco tuning voltage range 0.4 2.3 v v tune = 0.4v 135 802.11g v tune = 2.3v 62 v tune = 0.3v 324 low band v tune = 2.2v 167 v tune = 0.3v 330 lo tuning gain 802.11a high band v tune = 2.2v 175 mhz/v
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 12 ______________________________________________________________________________________ ac electrical characteristics miscellaneous blocks (max2828/max2829 evaluation kits: v cc = +2.7v, f rf = 2.437ghz (802.11g) or f rf = 5.25ghz (802.11a), f refosc = 40mhz, shdn = cs = high, sclk = din = low, r bias = 11k ? , t a = +25 c, unless otherwise noted.) parameter conditions min typ max units pa bias dac number of programmable bits 6 bits minimum output sink current d5:d0 = 000000 (see the pa bias dac register definition section) 0a maximum output sink current d5:d0 = 111111 (see the pa bias dac register definition section), output voltage = 0.8v 313 a turn-on time d9:d6 = 0000 (see the pa bias dac register definition section) 0.2 s dnl 1 lsb on-chip temperature sensor t a = -40 c 0.5 t a = +25 c 1.05 output voltage d11 = 1 (see the rx control/rssi register definition section) t a = +85 c 1.6 v ac electrical characteristics timing (max2828/max2829 evaluation kits: v cc = 2.7v, f rf = 2.437ghz (802.11g) or f rf = 5.25ghz (802.11a), f refosc = 40mhz, shdn = cs = high, sclk = din = low, pll loop bandwidth = 150khz, r bias = 11k ? , t a = +25 c, unless otherwise noted.) parameter conditions min typ max units system timing (see figure 1) turn-on time from shdn rising edge (pll locked) 50 s shutdown time 2s f rf = 2.412ghz to 2.5ghz 25 f rf = 5.15ghz to 5.35ghz 35 f rf = 5.45ghz to 5.875ghz 130 channel switching time f rf = 4.9ghz to 5.875ghz 130 s rx to tx 1 rx/tx turnaround time measured from tx or rx enable rising edge; signal settling to within 2db of steady state tx to rx, rxhp = 1 1.2 s tx turn-on time (from standby mode) from tx enable rising edge; signal settling to within 2db of steady state 1s rx turn-on time (from standby mode) from rx enable rising edge; signal settling to within 2db of steady state 1.2 s
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics ______________________________________________________________________________________ 13 ac electrical characteristics timing (continued) (max2828/max2829 evaluation kits: v cc = 2.7v, f rf = 2.437ghz (802.11g) or f rf = 5.25ghz (802.11a), f refosc = 40mhz, shdn = cs = high, sclk = din = low, pll loop bandwidth = 150khz, r bias = 11k ? , t a = +25 c, unless otherwise noted.) parameter conditions min typ max units 3-wire serial interface timing (see figure 2) sclk-rising-edge to cs -falling- edge wait time, t cso 6ns falling edge of cs to rising edge of first sclk time, t css 6ns din-to-sclk setup time, t ds 6ns din-to-sclk hold time, t dh 6ns sclk pulse-width high, t ch 6ns sclk pulse-width low, t cl 6ns last rising edge of sclk to rising edge of cs or clock to load enable setup time, t csh 6ns cs high pulse width, t csw 20 ns time between the rising edge of cs and the next rising edge of sclk, t cs1 6ns clock frequency, f clk 40 mhz rise time, t r 2ns fall time, t f 2ns note 1: devices are production tested at +85 c only. min and max limits at temperatures other than +85 c are guaranteed by design and characterization. note 2: register settings for mimo mode. a3:a0 = 0101 and a3:a0 = 0010, d13 = 1. note 3: the expected part-to-part variation of the rf gain step is 1db. note 4: tx i/q inputs = 100mv rms . set tx vga gain to max. table 1. receiver front-end gain-control settings b7 b6 gain 1 1 high 1 0 medium 0 x low table 2. receiver baseband vga gain settings b5:b1 gain 11111 max 11110 max - 2db 11101 max - 4db :: 00000 min
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 14 ______________________________________________________________________________________ table 3. receiver baseband vga gain step control bit gain step (typ) b1 2db b2 4db b3 8db b4 16db b5 32db table 4. tx vga gain control settings number b6:b1 output signal power 63 111111 max 62 111110 max - 0.5db 61 111101 max - 1.0db :: : 49 110001 max - 7db 48 110000 max - 7.5db 47 101111 max - 8db 46 101110 max - 8db 45 101101 max - 9db 44 101100 max - 9db :: : 5 000101 max - 29db 4 000100 max - 29db 3 000011 max - 30db 2 000010 max - 30db 1 000001 max - 30db 0 000000 max - 30db sclk power supply on xtal-osc shutdown mode standby mode din shutdown sclk (clock) din (data) txena rxena pabias receive mode transmit mode transmitter on receiver on pa bias d/a pa enable (drives rf t/r switch) (drives rf t/r switch and pa on/off) (drives power ramp control) 3-wire serial interface available power spi: program 2.4ghz or 5ghz mode, channel frequency, pa bias, transmitter linearity, receiver rssi operation, calibration mode, etc. mac spi mac 0 to 7 s cs shdn cs (select) max2828/max2829 figure 1. system timing diagram
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics ______________________________________________________________________________________ 15 a3 d12 d13 a0 a1 d0 t ch din t css sclk t cso t ds t dh t cl t csw t csh t cs1 a2 t cs figure 2. 3-wire serial-interface timing diagram typical operating characteristics (v cc = 2.7v, f rf = 2.437ghz (802.11g) or f rf = 5.25ghz (802.11a), f refosc = 40mhz, shdn = cs = high, rxhp = sclk = din = low, r bias = 11k ? , t a = +25 c using the max2828/max2829 evaluation kits.) 100 110 105 125 120 115 135 130 140 2.7 3.0 3.1 2.8 2.9 3.2 3.3 3.4 3.5 3.6 rx i cc vs. v cc max2828/9 toc01 v cc (v) i cc (ma) t a = +85 c t a = +25 c t a = -40 c 105 115 110 130 125 120 145 135 155 150 140 2.7 3.0 3.1 2.8 2.9 3.2 3.3 3.4 3.5 3.6 tx i cc vs. v cc max2828/9 toc02 v cc (v) i cc (ma) t a = +85 c t a = +25 c t a = -40 c 110 115 120 130 125 135 -35 -20 -15 -30 -25 -10 -5 0 tx i cc vs. p out max2828/9 toc03 p out (dbm) i cc (ma) 0 10 5 25 20 15 35 30 40 01014 2 6 18 20 24 28 12 16 4 8 22 26 30 32 noise figure vs. baseband gain settings max2828/9 toc04 gain settings nf (db) lna = low gain lna = medium gain lna = high gain 0 20 10 50 40 30 90 70 80 60 100 01014 2 6 18 20 24 28 12 16 4 8 22 26 30 32 rx voltage gain vs. baseband gain settings max2828/9 toc05 gain settings gain (db) lna = low gain lna = medium gain lna = high gain -4 -2 -3 1 0 -1 3 2 4 25 75 35 55 85 45 65 95 rx in-band output p-1db vs. gain max2828/9 toc06 gain (db) output p-1db (dbv rms ) lna medium-/high-gain switch point lna low-/medium- gain switch point 802.11g
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 16 ______________________________________________________________________________________ rx i/q dc offset settling response (-32db bb vga gain step) mmax2828/9 toc13 400ns/div 3v 2v 1v 0 6mv 4mv 2mv 0 0 5 2 11 9 7 4 3 1 10 8 6 12 -80 -20 -70 -60 -40 -10 -50 -30 0 rx evm vs. p in max2828/9 toc14 p in (dbm) evm (%) lna = low gain lna = medium gain lna = high gain 0 2.5 1.5 0.5 2.0 1.0 3.0 -29 -15 -27 -25 -21 -11 -17 -13 -23 -19 -9 rx evm vs. v out max2828/9 toc15 v out (dbv rms ) evm (%) p in = -50dbm typical operating characteristics (continued) (v cc = 2.7v, f rf = 2.437ghz (802.11g) or f rf = 5.25ghz (802.11a), f refosc = 40mhz, shdn = cs = high, rxhp = sclk = din = low, r bias = 11k ? , t a = +25 c using the max2828/max2829 evaluation kits.) 0 4 2 10 8 6 14 12 3 1 9 7 5 13 11 15 -110 -50 -30 -90 -70 -10 ofdm evm with ofdm jammer vs. ofdm jammer level with jammer offset frequency max2828/9 toc07 p jammer (dbm) evm (%) p in = -62dbm f offset = 20mhz f offset = 25mhz f offset = 40mhz f offset = 100mhz 0 1.0 0.5 2.5 2.0 1.5 3.0 -120 -20 -100 -60 0 -80 -40 20 rx rssi output vs. input power max2828/9 toc08 p in (dbm) rssi output (v) lna = low gain lna = medium gain lna = high gain -140 -120 -130 -60 -80 -100 -110 -50 -70 -90 -40 1ghz 7ghz (dbm) rx emission spectrum, lna input (tx off, lna = low gain) max2828/9 toc09 rx i/q dc offset settling response (-8db bb vga gain step) max2828/9 toc10 20ns/div 3v 2v 1v 0 6mv 4mv 2mv 0 rx i/q dc offset settling response (+8db bb vga gain step) max2828/9 toc11 20ns/div 3v 2v 1v 0 6mv 4mv 2mv 0 rx i/q dc offset settling response (-16db bb vga gain step) max2828/9 toc12 400ns/div 3v 2v 1v 0 6mv 4mv 2mv 0 802.11g
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics ______________________________________________________________________________________ 17 1k 10k 100k 1m 10m closed-loop phase noise max2828/9 toc22 frequency offset (hz) (dbm) -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -150 (khz) 0 50 40 -40 30 -30 20 -20 10 -10 -50 0 250 time ( s) channel-switching frequency settling (2500mhz to 2400mhz) max2828/9 toc23 -25khz 5khz/div 25khz 0 time ( s) 50 tx-rx turnaround frequency settling max2828/9 toc24 typical operating characteristics (continued) (v cc = 2.7v, f rf = 2.437ghz (802.11g) or f rf = 5.25ghz (802.11a), f refosc = 40mhz, shdn = cs = high, rxhp = sclk = din = low, r bias = 11k ? , t a = +25 c using the max2828/max2829 evaluation kits.) -6 -5 -1 -3 0 -2 -4 1 2.7 3.4 2.8 2.9 3.1 3.3 3.5 3.0 3.2 3.6 tx output power vs. v cc (b6:b1 = 111111) max2828/9 toc16 v cc (v) p out (dbm) t a = +85 c t a = +25 c t a = -40 c -6 -5 -1 -3 0 -2 -4 1 2.40 2.48 2.42 2.44 2.46 2.50 tx output power vs. frequency (b6:b1 = 111111) max2828/9 toc17 frequency (ghz) p out (dbm) t a = +85 c t a = +25 c t a = -40 c -100 -40 -60 -80 -90 -20 -30 -50 (dbm/100khz) -70 -10 2.397ghz 2.477ghz tx output spectrum (54mbps ofdm signal) max2828/9 toc18 b6:b1 = 111011 b6:b1 = 110101 -100 -40 -60 -80 -90 -20 -30 -50 -70 -10 0 1mhz (dbm) 26.5ghz tx output spectrum max2828/9 toc19 f = 2.4ghz f = 2.48ghz f = 2.56ghz f = 6.4ghz -35 -25 -30 -5 -15 p out (dbm) -20 -10 0 0 8 16 24 32 40 48 64 gain settings 56 tx output power vs. gain settings max2828/9 toc20 2.30 2.32 2.40 2.36 2.58 2.48 rf lo (ghz) 2.44 2.52 2.38 2.34 2.56 2.54 2.46 2.42 2.50 2.60 0.4 0.6 0.8 1.0 1.2 1.4 1.6 2.4 v tune (v) 2.0 1.8 2.2 lo frequency vs. v tune max2828/9 toc21 802.11g
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 18 ______________________________________________________________________________________ 0 34 17 68 51 85 102 802.11g tx p out at 2.4ghz max2828/9 toc31 1 /div mean = -3.32db dev = 0.518db sample size = 2196 1.50 1.70 1.60 1.90 evm (%) 1.80 1.65 1.55 1.85 1.75 1.95 2.00 -35 -30 -25 -20 0 p out (dbm) -10 -15 -5 tx evm vs. p out max2828/9 toc25 0 46 23 92 69 115 138 rx static dc offset max2828/9 toc26 1 /div mean = -826 v dev = 1.75mv sample size = 2270 0 64 32 128 96 160 192 rx gain imbalance max2828/9 toc27 1 /div mean = 0.044db dev = 0.08db sample size = 2221 0 64 32 128 96 160 192 rx phase imbalance max2828/9 toc28 1 /div mean = 90.2 dev = 0.63 sample size = 2221 0 36 18 72 54 90 108 tx lo leakage max2828/9 toc29 1 /div mean = -29.5dbc dev = 5.23db sample size = 2196 0 48 24 96 72 120 144 tx sideband suppression max2828/9 toc30 1 /div mean = -46.1dbc dev = 4.94db sample size = 2196 typical operating characteristics (continued) (v cc = 2.7v, f rf = 2.437ghz (802.11g) or f rf = 5.25ghz (802.11a), f refosc = 40mhz, shdn = cs = high, rxhp = sclk = din = low, r bias = 11k ? , t a = +25 c using the max2828/max2829 evaluation kits.) 802.11g
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics ______________________________________________________________________________________ 19 typical operating characteristics (continued) (v cc = 2.7v, f rf = 2.437ghz (802.11g) or f rf = 5.25ghz (802.11a), f refosc = 40mhz, shdn = cs = high, rxhp = sclk = din = low, r bias = 11k ? , t a = +25 c using the max2828/max2829 evaluation kits.) 802.11a 120 115 125 130 140 135 145 -35 -20 -15 -30 -25 -10 -5 0 tx i cc vs. p out max2828/9 toc34 p out (dbm) i cc (ma) 0 10 5 20 15 35 30 25 45 40 50 01014 2 6 18 20 24 28 12 16 4 8 22 26 30 32 noise figure vs. baseband gain settings max2828/9 toc35 gain settings nf (db) 5.25ghz 5.85ghz 5.25ghz 5.85ghz lna = medium lna = low lna = high 0 10 5 20 15 35 30 25 40 4.9 5.4 5.6 5.0 5.2 5.8 5.9 5.5 5.7 5.1 5.3 noise figure vs. frequency max2828/9 toc36 frequency (ghz) nf (db) gain = 15db, b7:b6 = 0x gain = 45db, b7:b6 = 10 gain = 50db, b7:b6 = 11 gain > 65db, b7:b6 = 11 0 20 40 100 80 60 120 01014 2 6 18 20 24 28 12 16 4 8 22 26 30 32 rx voltage gain vs. baseband gain setting max2828/9 toc37 gain settings gain (db) lna = low gain lna = medium gain lna = high gain -6 -4 -2 4 2 0 6 4.9 5.5 5.7 5.0 5.3 5.9 5.6 5.8 5.1 5.2 5.4 rx voltage gain variation vs. frequency max2828/9 toc38 frequency (mhz) gain variation (db) lna = high gain lna = medium gain lna = low gain -4 -2 -3 1 0 -1 3 2 4 25 75 35 55 85 45 65 95 rx in-band output p-1db vs. gain max2828/9 toc39 gain (db) output p-1db (dbv rms ) lna medium-/high-gain switch point 0 1.0 0.5 2.5 2.0 1.5 3.0 -110 -10 -90 -50 10 -70 -30 rx rssi output vs. input power max2828/9 toc40 p in (dbm) rssi output (v) lna = low gain lna = medium gain lna = high gain 110 120 150 140 130 170 160 2.7 3.0 3.1 2.8 2.9 3.2 3.3 3.4 3.5 3.6 rx i cc vs. v cc max2828/9 toc32 v cc (v) i cc (ma) t a = +85 c t a = +25 c t a = -40 c 100 110 140 130 120 160 150 2.7 3.0 3.1 2.8 2.9 3.2 3.3 3.4 3.5 3.6 tx i cc vs. v cc max2828/9 toc33 v cc (v) i cc (ma) t a = +85 c t a = +25 c t a = -40 c
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 20 ______________________________________________________________________________________ -12 -6 -10 -4 -8 -2 -0 4.9 5.6 5.7 5.8 5.0 5.1 5.2 5.3 5.4 5.5 5.9 tx output power vs. frequency (b6:b1 = 111111) max2828/9 toc49 frequency (ghz) p out (dbm) t a = +85 c t a = +25 c t a = -40 c rx i/q dc offset settling response (-8db bb vga gain step) max2828/9 toc43 20ns/div 3v 2v 1v 0 6mv 4mv 2mv 0 rx i/q dc offset settling response (-16db bb vga gain step) max2828/9 toc44 400ns/div 3v 2v 1v 0 6mv 4mv 2mv 0 rx i/q dc offset settling response (-32db bb vga gain step) max2828/9 toc45 400ns/div 3v 2v 1v 0 6mv 4mv 2mv 0 0 2 4 10 12 14 8 6 16 -80 -20 -70 -60 -40 -10 -50 -30 0 rx evm vs. p in max2828/9 toc46 p in (dbm) evm (%) lna = low gain lna = medium gain lna = high gain 0 2.5 1.5 0.5 2.0 1.0 3.0 3.5 4.0 -29 -15 -27 -25 -21 -11 -17 -13 -23 -19 -9 rx evm vs. v out p out (dbv rms ) evm (%) p in = -50dbm max2828/9 toc47 -9 -8 -4 -6 -3 -5 -7 -2 2.7 3.4 2.8 2.9 3.1 3.3 3.5 3.0 3.2 3.6 tx output power vs. v cc (b6:b1 = 111111) max2828/9 toc48 v cc (v) p out (dbm) t a = +85 c t a = +25 c t a = -40 c -90 -60 -70 -80 -85 -55 -65 (dbm) -75 -50 1ghz 14ghz rx emission spectrum, lna input (tx off, lna = low gain) max2828/9 toc41 f = 4.1ghz f = 8.3ghz rx i/q dc offset settling response (+8db bb vga gain step) max2828/9 toc42 20ns/div 3v 2v 1v 0 6mv 4mv 2mv 0 typical operating characteristics (continued) (v cc = 2.7v, f rf = 2.437ghz (802.11g) or f rf = 5.25ghz (802.11a), f refosc = 40mhz, shdn = cs = high, rxhp = sclk = din = low, r bias = 11k ? , t a = +25 c using the max2828/max2829 evaluation kits.) 802.11a
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics ______________________________________________________________________________________ 21 typical operating characteristics (continued) (v cc = 2.7v, f rf = 2.437ghz (802.11g) or f rf = 5.25ghz (802.11a), f refosc = 40mhz, shdn = cs = high, rxhp = sclk = din = low, r bias = 11k ? , t a = +25 c using the max2828/max2829 evaluation kits.) 802.11a -40 -30 -35 -10 -5 -20 p out (dbm) -25 -15 0 0 8 16 24 32 40 48 64 gain settings 56 tx output power vs. gain settings max2828/9 toc52 lo frequency vs. v tune max2828/29 toc53 v tune (v) lo frequency (mhz) 2.0 1.8 1.4 1.6 0.8 1.0 1.2 0.6 4600 4800 5000 5200 5400 5600 5800 6000 6200 4400 0.4 2.2 high-band vco d10:d9 = 11 d10:d9 = 11 low-band vco 10 10 01 01 00 00 0250 channel-switching frequency settling (5.35ghz to 5.15ghz) max2828/9 toc55 (khz) 0 time ( s) 50 40 -40 30 -30 20 -20 10 -10 -50 0250 channel-switching frequency settling (5.875ghz to 4.9ghz) max2828/9 toc56 (khz) 0 time ( s) 50 40 -40 30 -30 20 -20 10 -10 -50 tx-rx turnaround frequency settling max2828/9 toc57 25khz -25khz 5khz/div 050 time ( s) 1.7 2.1 1.9 evm (%) 2.3 2.0 1.8 2.2 2.4 -35 -30 -25 -20 0 p out (dbm) -10 -15 -5 tx evm vs. p out max2828/9 toc58 1k 10k 100k 1m 10m closed-loop phase noise max2828/9 toc54 frequency offset (hz) (dbm) -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -150 -110 -40 -70 -90 -100 -20 -50 -30 -60 -80 -10 5.21ghz (dbm/100khz) 5.29ghz tx output spectrum (54mbps ofdm signal) max2828/9 toc50 b6:b1 = 111100 0 -40 -70 -90 -100 -20 -50 -30 -60 -80 -10 1mhz 26.5ghz tx output spectrum max2828/9 toc51 f = 8.2ghz f = 7.2ghz f = 6.2ghz f = 5.2ghz (dbm)
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 22 ______________________________________________________________________________________ rx rssi step response (-40db signal step) max2828/9 toc67 2v 1.5v 1v 0.5v 0 200ns/div 0 80 40 160 120 200 240 rx phase imbalance max2828/9 toc61 1 /div mean = 90.3 dev = 0.55 sample size = 2268 0 32 16 64 48 80 96 tx lo leakage max2828/9 toc62 1 /div mean = -29.5dbc dev = 5.24db sample size = 2236 0 32 16 64 48 80 96 tx sideband suppression max2828/9 toc63 1 /div mean = -47.9dbc dev = 3.3db sample size = 2237 0 34 17 68 51 85 102 802.11a tx p out at 5.25ghz 4max2828/9 toc64 1 /div mean = -2.8db dev = 0.68db sample size = 2237 i/q output dc error droop (rxhp = 1?; a3:a1 = 1000, d2 = 0) max2828/9 toc65 20ms/div 20mv/div rx rssi step response (+40db signal step) max2828/9 toc66 2v 1.5v 1v 0.5v 0 200ns/div 0 46 23 92 69 115 138 rx static dc offset max2828/9 toc59 1 /div mean = -826 v dev = 1.75mv sample size = 2270 0 62 31 124 93 155 186 rx gain imbalance max2828/9 toc60 1 /div mean = -0.007db dev = 0.08db sample size = 2268 typical operating characteristics (continued) (v cc = 2.7v, f rf = 2.437ghz (802.11g) or f rf = 5.25ghz (802.11a), f refosc = 40mhz, shdn = cs = high, rxhp = sclk = din = low, r bias = 11k ? , t a = +25 c using the max2828/max2829 evaluation kits.) 802.11a 802.11g/802.11a
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics ______________________________________________________________________________________ 23 0 32 16 64 48 80 96 rx i/q common-mode voltage spread max2828/9 toc76 1 /div mean = 917mv dev = 17.2mv sample size = 2270 rx bb vga settling response (-16db gain step) max2828/9 toc70 4v 2v 0 2v 1.5v 1v 0.5v 0 40ns/div rx bb vga settling response (-32db gain step) max2828/9 toc71 4v 2v 0 2v 1.5v 1v 0.5v 0 40ns/div rx bb frequency response vs. fine setting (coarse setting = 9.5mhz) max2828/9 toc72 30 15 0 -15 -30 -45 -60 -75 -105 -90 -120 -135 70mhz 1mhz (db) rx bb frequency response vs. coarse setting (fine setting = 010) max2828/9 toc73 30 15 0 -15 -30 -45 -60 -75 -105 -90 -120 -135 70mhz 1mhz (db) 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 110100 tx baseband frequency response max2828/9 toc74 p out (dbm) evm (%) 0 10 20 30 40 50 156 34 2 7 8 9 10 11 group delay ripple vs. frequency (coarse setting = 9.5mhz) max2828/9 toc75 frequency (mhz) group delay ripple (ns) typical operating characteristics (continued) (v cc = 2.7v, f rf = 2.437ghz (802.11g) or f rf = 5.25ghz (802.11a), f refosc = 40mhz, shdn = cs = high, rxhp = sclk = din = low, r bias = 11k ? , t a = +25 c using the max2828/max2829 evaluation kits.) rx bb vga settling response (+8db gain step) max2828/9 toc68 6v 4v 2v 0 0.3v 0.2v 0.1v 0 40ns/div rx bb vga settling response (-8db gain step) max2828/9 toc69 4v 2v 0 0.8v 0.6v 0.4v 0.2v 0 40ns/div 802.11g/802.11a
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 24 ______________________________________________________________________________________ block diagrams/typical operating circuits tx analog input signal from baseband ic reference oscillator input serial input from baseband ic rx analog output to baseband ic 5ghz tx rf output to bpf and pa pa bias current to pa mode-control logic signal from baseband ic 5ghz rx rf output from switch and bpf rx front-end gain-control bit from baseband ic rx front-end and tx baseband gain-control bit from baseband ic rx/tx baseband-control bits from baseband ic control bit from baseband ic mode-control logic signal from baseband ic rssi output mode-control logic signal from baseband ic lock-detect output to baseband ic 0.5pf 0.5pf 1.2pf 1.2pf 620 ? 300 ? 10nf c1 150pf c2 560pf 2nh 1.8nh 2 1 3 4 5 6 7 8 b6 v cc v cc b7 n.c. n.c. n.c. gnd rxrfh gnd txrfh+ b2 gnd b4 v cc v cc v cc v cc b5 b3 9 txrfh- txena pabias v cc v cc v cc v cc txbbi+ txbbi- txbbq+ txbbq- r bias v ref gnd din sclk rxena rxhp rssi v cc v cc bypass gnd gnd cpout gnd rosc ld b1 rxbbi+ rxbbi- rxbbq+ rxbbq- 10 11 12 13 15 16 17 18 19 20 14 21 22 23 24 25 26 27 28 29 33 32 31 34 35 36 37 38 39 40 41 42 55 54 53 52 51 50 49 48 47 46 45 44 43 56 30 tune cs max2828 shdn mux rssi mux pll serial interface 0 90
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics ______________________________________________________________________________________ 25 block diagrams/typical operating circuits (continued) tx analog input signal from baseband ic reference oscillator input serial input from baseband ic rx analog output to baseband ic 5ghz tx rf output to bpf and pa pa bias current to pa mode-control logic signal from baseband ic 5ghz rx rf output from switch and bpf rx front-end gain-control bit from baseband ic rx front-end and tx baseband gain-control bit from baseband ic rx/tx baseband-control bits from baseband ic control bit from baseband ic mode-control logic signal from baseband ic rssi output mode-control logic signal from baseband ic lock-detect output to baseband ic 0.5pf 0.5pf 1.2pf 1.2pf 620 ? 300 ? 10nf c1 150pf c2 560pf 2nh 2.4ghz tx rf output to bpf and pa 1.8pf 1.8pf 6.8nh 2 1 3 4 5 6 7 8 b6 v cc v cc b7 rxrfl txrfl+ txrfl- gnd rxrfh gnd txrfh+ b2 gnd b4 v cc v cc v cc v cc b5 b3 9 txrfh- txena pabias v cc v cc v cc v cc txbbi+ txbbi- txbbq+ txbbq- r bias v ref gnd din sclk rxena rxhp rssi v cc v cc bypass gnd gnd cpout gnd rosc ld b1 rxbbi+ rxbbi- rxbbq+ rxbbq- 10 11 12 13 15 16 17 18 19 20 14 21 22 23 24 25 26 27 28 29 33 32 31 34 35 36 37 38 39 40 41 42 55 54 53 52 51 50 49 48 47 46 45 44 43 56 30 tune cs max2829 shdn mux rssi mux pll serial interface 0 90 0 90 3.6nh 8.2pf 1pf 2.40ghz rx rf output from switch and bpf 2 1.8nh
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 26 ______________________________________________________________________________________ pin description pin max2828 max2829 name function 1 1 b6 rx front-end and tx gain-control digital input bit 6 22v cc 2.4ghz/5ghz lna supply voltage. bypass with a capacitor as close to the pin as possible. do not share the bypass-capacitor ground vias with any other branches. 3 3 b7 rx front-end gain-control digital input bit 7 4, 11, 12 n.c. no connection. leave unconnected. 5 5 gnd lna ground. make connections to ground vias as short as possible. do not share ground vias with any of the other branches. 6 6 rxrfh 5ghz single-ended lna input. requires ac-coupling and external matching network. 7 7 gnd lna ground. make connections to ground vias as short as possible. do not share ground vias with any other branches. 88 txrfh+ 9 9 txrfh- 5ghz tx pa driver differential outputs. requires ac-coupling and external matching network (and balun) to the external pa input. 10 10 v cc tx rf supply voltage. bypass with a capacitor as close to the pin as possible. do not share the bypass-capacitor ground vias with any other branches. 13 13 txena tx mode enable digital input. set high to enable tx (see figure 1). 14 14 pabias dac current output. connect directly to the external pa bias pin. 15 15 v cc tx baseband filter supply voltage. bypass with a capacitor as close to the pin as possible. do not share the bypass-capacitor ground vias with any other branches. 16 16 txbbi+ 17 17 txbbi- tx baseband i-channel differential inputs 18 18 txbbq+ 19 19 txbbq- tx baseband q-channel differential inputs 20 20 v cc tx upconverter supply voltage. bypass with a capacitor as close to the pin as possible. do not share the bypass-capacitor ground vias with any other branches. 21 21 r bias this analog voltage input is internally biased to a bandgap voltage. connect an external precision 11k ? resistor or current source between this pin and ground to set the bias current for the device. 22 22 v cc reference circuit supply voltage. bypass with a capacitor as close to the pin as possible. do not share the bypass-capacitor ground vias with any other branches. 23 23 v ref reference voltage output 24 24 gnd digital circuit ground. make connections to ground vias as short as possible. do not share ground vias with any other branches. 25 25 v cc digital circuit supply voltage. bypass with a capacitor as close to the pin as possible. do not share the bypass-capacitor ground vias with any other branches.
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics ______________________________________________________________________________________ 27 pin description (continued) pin max2828 max2829 name function 26 26 din data digital input of 3-wire serial interface (see figure 2) 27 27 sclk clock digital input of 3-wire serial interface (see figure 2) 28 28 cs active-low enable digital input of 3-wire serial interface (see figure 2) 29 29 ld lock-detect digital output of frequency synthesizer. output high indicates that the frequency synthesizer is locked. 30 30 rosc reference oscillator input. connect an external reference oscillator to this analog input. 31 31 v cc pll charge-pump supply voltage. bypass with a capacitor as close to the pin as possible. do not share the bypass-capacitor ground vias with any other branches. 32 32 gnd charge-pump circuit ground. make connections to ground vias as short as possible. do not share ground vias with any other branches. 33 33 cpout charge-pump output. connect the frequency synthesizer s loop filter between cpout and tune. keep the line from this pin to the tune input as short as possible to prevent spurious pickup. connect c2 as close to cpout as possible. do not share the capacitor ground vias with any other branches (see the typical operating circuit ). 34 34 gnd ground. make connections to ground vias as short as possible. do not share ground vias with any other branches. 35 35 gnd vco ground. make connections to ground vias as short as possible. do not share ground vias with any other branches. 36 36 tune vco tune input. connect c1 as close to tune as possible. connect the ground of c1 to vco ground. do not share the capacitor ground vias with any other branches (see the typical operating circuit ). 37 37 bypass bypass with a 0.1f capacitor to gnd. the capacitor is used by the on-chip vco voltage regulator. 38 38 v cc vco supply voltage. bypass to system ground as close as possible to the pin with capacitors. do not share the ground vias for the bypass capacitors with any other branches. 39 39 shdn active-low shutdown digital input. set high to enable the device. 40 40 rssi rssi or temperature-sensor multiplexed output 41 41 rxena rx mode enable digital input. set high to enable rx. 42 42 rxhp rx baseband ac-coupling highpass corner frequency control digital input selection bit 43 43 rxbbq- 44 44 rxbbq+ rx baseband q-channel differential outputs. in tx calibration mode, these pins are the lo leakage and sideband-detector outputs. 45 45 rxbbi- 46 46 rxbbi+ rx baseband i-channel differential outputs. in tx calibration mode, these pins are the lo leakage and sideband-detector outputs. 47 47 v cc rx baseband buffer supply voltage. bypass with a capacitor as close to the pin as possible. do not share the bypass-capacitor ground vias with any other branches. 48 48 b1 rx/tx gain-control digital input bit 1 49 49 v cc rx baseband filter supply voltage. bypass with a capacitor as close to the pin as possible. do not share the bypass-capacitor ground vias with any other branches.
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 28 ______________________________________________________________________________________ detailed description the max2828/max2829 single-chip, rf transceiver ics are designed for wlan applications. the max2828 is designed for 5ghz 802.11a (ofdm), and the max2829 is designed for dual-band 2.4ghz 802.11b/g and 5ghz 802.11a. the ics include all circuitry required to imple- ment the rf transceiver function, fully integrating the receive path, transmit path, vco, frequency synthesiz- er, and baseband/control interface. modes of operation the max2828/max2829 have seven primary modes of operation: shutdown, spi reset, standby, transmit, receive, transmitter calibration, and receiver calibration (see table 5). pin description (continued) pin max2828 max2829 name function 50 50 b2 rx/tx gain-control digital input bit 2 51 51 gnd rx if ground. make connections to ground vias as short as possible. do not share ground vias with any other branches. 52 52 v cc rx if supply voltage. bypass with a capacitor as close to the pin as possible. do not share the bypass-capacitor ground vias with any other branches. 53 53 b3 rx/tx gain-control digital input bit 3 54 54 b4 rx/tx gain-control digital input bit 4 55 55 v cc rx downconverter supply voltage. bypass with a capacitor as close to the pin as possible. do not share the bypass-capacitor ground vias with any other branches. 56 56 b5 rx/tx gain-control digital input bit 5 4 rxrfl 2.4ghz single-ended lna input. requires ac-coupling and external matching network. 11 txrfl+ 12 txrfl- 2.4ghz tx pa driver differential outputs. requires ac-coupling and external matching network (and balun) to the external pa input. ep ep exposed paddle exposed paddle. connect to the ground plane with multiple vias for proper operation and heat dissipation. logic pins mode shdn txena rxena register settings spi reset 0 1 1 x shutdown 0 0 0 x standby 1 0 0 x rx 1 0 1 x tx 1 1 0 x tx calibration 1 1 0 calibration register d1 = 1 rx calibration 1 0 1 calibration register d0 = 1 table 5. mode table x = don t care or do not apply. spi is a trademark of motorola, inc.
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics ______________________________________________________________________________________ 29 shutdown mode shutdown mode is achieved by driving shdn low. in shutdown mode, all circuit blocks are powered down, except for the serial interface. while the device is in shutdown, the values of the serial interface registers are maintained and can be changed as long as v cc (pin 25) is applied. spi reset by driving rxena and txena high while setting shdn low, all circuit blocks are powered down, as in shut- down mode. however, in spi reset mode, all registers are returned to their default states. it is recommended to reset the spi and all registers at the start of power-up to ensure that the registers are set to the correct values (see table 9). standby mode to place the device in standby mode, set shdn high and rxena and txena low. this mode is mainly used to enable the frequency synthesizer block while the rest of the device is powered down. in this mode, various blocks in the system can be selectively turned on or off according to the standby register table (table 10). receive (rx) mode to place the device in rx mode, set rxena high. all receiver blocks are enabled in this mode. transmit (tx) mode to place the device in tx mode, set txena high. all transmitter blocks are enabled in this mode. tx/rx calibration mode the max2828/max2829 feature tx/rx calibration modes to detect i/q imbalances and transmit lo leak- age. in the tx calibration mode, the lo leakage cali- bration is done only for the lo leakage signal that is present at the center frequency of the channel (i.e., in the middle of the ofdm or qpsk spectrum). the lo leakage calibration includes the effect of all dc offsets in the entire baseband paths of the i/q modulator, and also includes direct leakage of the lo to the i/q modu- lator output. the transmitter lo leakage and sideband-detector out- put is taken at the receiver i- or q-channel output dur- ing this calibration phase. during tx lo leakage and i/q imbalance calibration, a sine and cosine signal (f = f tone ) is input to the base- band i/q tx pins from the baseband ic. at the lo leak- age and sideband-detector output, the lo leakage corresponds to the signal at f tone and the sideband suppression corresponds to the signal at 2 x f tone . the output power of these signals vary 2db for 1db of variation in the lo leakage and unwanted sideband levels. to calibrate the tx path, first set the power- detector gain to 8db (table 14). adjust the dc offset of the baseband inputs to minimize the signal at f tone (lo leakage). then, adjust the baseband input relative magnitude and phase offsets to reduce the signal at 2 x f tone . if required, calibration can be done with higher lo leakage and sideband-detector gain settings to decrease lo leakage and increase image suppression. after calibrating the transmitter, receiver calibration can be done. in rx calibration mode, the calibrated tx rf signal is internally routed to the rx downconverter inputs. in this loopback calibration mode, the voltage regulator must be able to source 350ma total since both tx and rx are turned on simultaneously. rf synthesizer programming in 5ghz mode in the 5ghz mode, the rf frequency synthesizer cov- ers a 4.9ghz to 5.9ghz range. to achieve this large tuning range while maintaining excellent noise perfor- mance, the 1ghz band is divided into sub-bands within which the vco is tuned. the selection of the appropri- ate vco sub-band is done automatically by a finite state machine (fsm). the pll settling time is approxi- mately 300s for a change of 1ghz in the channel fre- quency. a faster pll settling can be achieved by overriding the fsm and manually programming the vco sub-band. automatic vco sub-band selection by enabling this band-selection mode, only 1 bit needs to be programmed to start the frequency acquisition. the fsm will automatically stop after it selects the cor- rect vco sub-band, and after the pll has locked.
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 30 ______________________________________________________________________________________ the following steps should be followed: 1) set d8 = 0 (a3:a0 = 0101) to enable the automatic vco sub-band selection by the fsm. 2) enable the pll and vco if required. if required, program the divider ratios corresponding to the desired channel frequency. 3) set d7 = 1 (a3:a0 = 0101) to start the fsm. the fsm should only be started after pll and vco are enabled, or after channel frequency is changed. 4) the vco sub-band selection and pll settling time takes less than approximately 300s. after the band switching is completed and the pll has locked to the correct channel frequency, the fsm stops automatically. every time the channel frequency is programmed or the pll+vco is enabled, the fsm needs to be reset to be used again for the next time. this reset operation does not affect the pll or vco. to reset the fsm, set d7 = 0 (a3:a0 = 0101). every channel frequency maps to some vco sub- band. each vco sub-band has a digital code, of which the 2 lsbs (b1:b0) are readable. the b1:b0 code can be read through pin ld by programming d3:d0 = 0111 (a3:a1 = 0000) for b1, or d3:d0 = 0110 (a3:a1 = 0000) for b0 (see table 6). manual vco sub-band selection for faster settling, the vco sub-band (b1:b0) can be directly programmed through the spi. first, the b1:b0 code for every channel frequency must be determined. once this is known, the b1:b0 code is directly pro- grammed along with the pll divider values, for the given channel frequency. the pll settling time in this case is approximately 50s. large temperature changes (>+50 c) may cause the channel frequency to move into an adjacent sub-band. to determine the correct sub-band, two on-chip com- parators monitor the vco control voltage (v tune ). these comparator logic outputs can be read through the ld pin to decide whether the frequency sub-band is correct or needs to be reprogrammed. the following steps need to be followed to complete manual pll frequency acquisition and vco sub-band selection: 1) set d8 = 1 (a3:a0 = 0101) to enable manual vco sub-band selection. 2) enable the pll and vco if required. if required, program the divider ratios corresponding to the desired channel frequency. 3) set d10:d9 (a3:a0 = 0101) to program the vco frequency sub-band according to table 7. d10:d9 correspond to the same assignments as b1:b0. after d10:d9 are programmed, 50s is required to allow the pll to settle. 4) after 50s of pll settling time, the comparator out- puts can be read through pin ld (see table 8). 5) based on the comparator outputs, the vco frequen- cy sub-band is programmed again according to table 8 until the frequency acquisition is achieved. large temperature changes if the pll and vco are continuously active (i.e., no reprogramming) and the die temperature changes by 50 c (as indicated by the on-chip temperature sensor), there is a possibility that the pll may get unlocked due b1 b0 vco frequency band 0 0 band 0 (lowest frequency band) 0 1 band 1 1 0 band 2 1 1 band 3 (highest frequency band) table 6. b1:b0 vco sub-band assignments (read back through lock- detect pin) d10 d9 programmed vco frequency band 0 0 band 0 0 1 band 1 1 0 band 2 1 1 band 3 table 7. d10:d9 vco sub-band assignments (for programming through spi) a3:a1 = 0000; d3:d0 = 0101 a3:a1 = 0000; d3:d0 = 0100 response 00 program to a lower sub-band if vco is not in band 0. 0 1 no change. 10 program to a higher sub- band if vco is not in band 3. 11 invalid state, does not occur. table 8. comparator-output definition
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics ______________________________________________________________________________________ 31 to the vco drifting to an adjacent sub-band. in this case, it is advisable to reprogram the pll by either manual or automatic sub-band selection. programmable registers the max2828/max2829 include 13 programmable, 18- bit registers: 0, 1, standby, integer-divider ratio, frac- tional-divider ratio, band select and pll, calibration, lowpass filter, rx control/rssi, tx linearity/baseband gain, pa bias dac, rx gain, and tx vga gain. the 14 most significant bits (msbs) are used for register data. the 4 least significant bits (lsbs) of each register con- tain the register address. data is shifted in msb first. the data sent to the devices, in 18-bit words, is framed by cs . when cs is low, the clock is active and data is shifted with the rising edge of the clock. when cs tran- sitions high, the shift register is latched into the register selected by the contents of the address bits. only the last 18 bits shifted into the device are retained in the shift register. no check is made on the number of clock pulses. for programming data words less than 14 bits long, only the required data bits and the address bits are required to be shifted, resulting in faster rx and tx gain control where only the lsbs need to be pro- data bit default description d13 0 mimo select. set to 0 for normal operation. set to 1 for mimo applications. d12 1 set to 1 d11 0 voltage reference (pin 23) d10 0 pa bias dac, in tx mode d9 0 d8 0 d7 0 d6 0 d5 0 d4 0 d3 0 set to 0 d2 1 d1 1 d0 1 set to 1 table 10. standby register (a3:a0 = 0010) default address register d13 d12 d11 d10 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 (a3:a0) table register 0 01000101000000 0000 register 1 00000011001010 0001 standby 01000000000111 0010 10 integer-divider ratio 11000010100010 0011 11 fractional- divider ratio 01110111011101 0100 12 band select and pll 01100000100100 0101 13 calibration 01110000000000 0110 14 lowpass filter 00000000101010 0111 15 rx control/rssi 00000000100101 1000 16 tx linearity/base- band gain 00001000000000 1001 17 pa bias dac 00001111000000 1010 18 rx gain 00000001111111 1011 19 tx vga gain 00000000000000 1100 20 table 9. register default/spi reset settings
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 32 ______________________________________________________________________________________ grammed. the interface can be programmed through the 3-wire spi/microwire -compatible serial port. on startup, it is recommended to reset all registers by placing the device in spi reset mode (table 5). standby register definition (a3:a0 = 0010) various internal blocks can be turned on or off using the standby register (in standby mode, see table 10). setting a bit to 1 turns the block on, while setting a bit to 0 turns the block off. integer-divider ratio register definition (a3:a0 = 0011) this register contains the integer portion of the divider ratio of the synthesizer. this register, in conjunction with the fractional-divider ratio register, permits selection of a precise frequency. the main synthesizer divide ratio is an 8-bit value for the integer portion (see table 11). valid values for this register are from 128 to 255 (d7 d0). the default value is 210. d13 and d12 are reserved for the 2 lsbs of the fractional-divider ratio. fractional-divider ratio register definition (a3:a0 = 0100) this register (along with d13 and d12 of the integer- divider ratio register) controls the fractional-divider ratio with 16-bit resolution. d13 to d0 of this register com- bined with d13 and d12 of the integer-divider ratio reg- ister form the whole fractional-divider ratio (see tables 12a and 12b). data bit default description d13 1 d12 1 2 lsbs of the fractional-divider ratio d11 0 d10 0 d9 0 d8 0 set to 0 d7 1 d6 0 d5 1 d4 0 d3 0 d2 0 d1 1 d0 0 integer-divider ratio word programming bits. valid values are from 128 (d7:d0 = 10000000) to 255 (d7:d0 = 11111111). table 11. integer-divider ratio register (a3:a0 = 0011) integer-divider ratio fractional-divider ratio f rf (mhz) (f rf x 4/3) / 20mhz (divider ratio) a3:a0 = 0011, d7:d0 a3:a0 = 0100, d13:d0 (hex) a3:a0 = 0011, d13:d12 (hex) 2412 160.8000 1010 0000 3333 00 2417 161.1333 1010 0001 0888 10 2422 161.4667 1010 0001 1ddd 11 2427 161.8000 1010 0001 3333 00 2432 162.1333 1010 0010 0888 10 2437 (default) 162.4667 1010 0010 1ddd 11 2442 162.8000 1010 0010 3333 00 2447 163.1333 1010 0011 0888 10 2452 163.4667 1010 0011 1ddd 11 2457 163.8000 1010 0011 3333 00 2462 164.1333 1010 0100 0888 10 2467 164.4667 1010 0100 1ddd 11 2472 164.8000 1010 0100 3333 00 2484 165.6000 1010 0101 2666 01 table 12a. ieee 802.11g frequency plan and divider ratio programming words microwire is a trademark of national semiconductor corp.
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics ______________________________________________________________________________________ 33 integer-divider ratio fractional-divider ratio f rf (mhz) (f rf x 4/5) / 20mhz (divider ratio) a3:a0 = 0011, d7:d0 a3:a0 = 0100, d13:d0 (hex) a3:a0 = 0011, d13:d12 (hex) 5180 207.2 1100 1111 0ccc 11 5200 208.0 1101 0000 0000 00 5220 208.8 1101 0000 3333 00 5240 209.6 1101 0001 2666 01 5260 210.4 1101 0010 1999 10 5280 211.2 1101 0011 0ccc 11 5300 212.0 1101 0100 0000 00 5320 212.8 1101 0100 3333 00 5500 220.0 1101 1100 0000 00 5520 220.8 1101 1100 3333 00 5540 221.6 1101 1101 2666 01 5560 222.4 1101 1110 1999 10 5580 223.2 1101 1111 0ccc 11 5600 224.0 1110 0000 0000 00 5620 224.8 1110 0000 3333 00 5640 225.6 1110 0001 2666 01 5660 226.4 1110 0010 1999 10 5680 227.2 1110 0011 0ccc 11 5700 228.0 1110 0100 0000 00 5745 229.8 1110 0101 3333 00 5765 230.6 1110 0110 2666 01 5785 231.4 1110 0111 1999 10 5805 232.2 1110 1000 0ccc 11 table 12b. ieee 802.11a frequency plan and divider ratio programming words
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 34 ______________________________________________________________________________________ band-select and pll register definition (a3:a0 = 0101) this register configures the programmable-reference frequency dividers for the synthesizers, and sets the dc current for the charge pump. the programmable- reference frequency divider provides the reference fre- quencies to the phase detector by dividing the crystal oscillator frequency (see table 13). calibration register definition (a3:a0 = 0110) this register configures the rx/tx calibration modes (see table 14). data bit default description d13 0 set to 0 for normal operation. set to 1 for mimo applications. d12 1 d11 1 set d12:d11 = 11 d10 0 d9 0 these bits set the vco sub-band when programmed using the spi (d8 = 1). d10:d9 = 00: lowest frequency band; 11: highest frequency band. d8 0 vco spi bandswitch enable. 0: disable spi control, bandswitch is done by fsm; 1: bandswitch is done by spi programming. d7 0 vco bandswitch enable. 0: disable; 1: start automatic bandswitch. d6 0 rf frequency band select in 802.11a mode (d0 = 1). 0: 4.9ghz to 5.35ghz band; 1: 5.47ghz to 5.875ghz band. d5 1 pll charge-pump-current select. 0: 2ma; 1: 4ma. d4 0 set to 0 d3 0 d2 1 d1 0 these bits set the reference-divider ratio. d3:d1 = 001 corresponds to r = 1 and 111 corresponds to r = 7. d0 0 rf frequency band select. 0: 2.4ghz band; 1: 5ghz band. table 13. band-select and pll register (a3:a0 = 0101) data bit default description d13 0 set to 0 d12 1 d11 1 transmitter i/q calibration lo leakage and sideband-detector gain-control bits. d12:d11 = 00: 8db; 01: 18db; 10: 24db; 11: 34db d10 1 set to 1 d9 0 d8 0 d7 0 d6 0 d5 0 d4 0 d3 0 d2 0 set to 0 d1 0 0: tx calibration mode disabled; 1: tx calibration mode enabled (rx outputs provide the lo leakage and sideband-detector signal) d0 0 0: rx calibration mode disabled; 1: rx calibration mode enabled table 14. calibration register (a3:a0 = 0110)
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics ______________________________________________________________________________________ 35 data bit default description d13 0 d12 0 set to 0 d11 0 rssi high bandwidth enable. 0: 2mhz; 1: 6mhz d10 0 d9 0 d8 0 d7 0 set to 0 d6 0 d5 1 tx lpf corner frequency coarse adjustment. d6:d5 = 00: undefined; 01: 12mhz (nominal mode); 10: 18mhz (turbo mode 1); 11: 24mhz (turbo mode 2). d4 0 d3 1 rx lpf corner frequency coarse adjustment. d4:d3 = 00: 7.5mhz; 01: 9.5mhz (nominal mode); 10: 14mhz (turbo mode 1); 11: 18mhz (turbo mode 2). d2 0 d1 1 d0 0 rx lpf corner frequency fine adjustment (relative to the course setting). d2:d0 = 000: 90%; 001: 95%; 010: 100%; 011: 105%; 100: 110%. table 15. lowpass-filter register (a3:a0 = 0111) data bit default description d13 0 set to 0 d12 0 enable rx vga gain programming serially. 0: rx vga gain programmed with external digital inputs (b7:b1); 1: rx vga gain programmed with serial data bits in the rx gain register (d6:d0). d11 0 rssi output range. 0: low range (0.5v to 2v); 1: high range (0.5v to 2.5v). d10 0 rssi operating mode. 0: rssi disabled if rxhp = 0, and enabled if rxhp = 1; 1: rssi enabled independent of rxhp (see table 16c). d9 0 set to 0 d8 0 rssi pin function. 0: outputs rssi signal in rx mode; 1: outputs temperature sensor voltage in rx, tx, and standby modes (see table 16c). d7 0 d6 0 set to 0 d5 1 set to 1 d4 0 d3 0 set to 0 d2 1 rx highpass -3db corner frequency when rxhp = 0. 0: 100hz; 1: 30khz d1 0 d0 1 set d1:d0 = 01 table 16a. rx control/rssi register (a3:a0 = 1000) lowpass filter register definition (a3:a0 = 0111) this register allows the adjustment of the rx and tx lowpass filter corner frequencies (see table 15). rx control/rssi register definition (a3:a0 = 1000) this register allows the adjustment of the rx section and the rssi output (see tables 16a and 16b).
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 36 ______________________________________________________________________________________ tx linearity/baseband gain register definition (a3:a0 = 1001) this register allows the adjustment of the tx gain and linearity (see table 17). rxhp a3:a0 = 1000, d2 rx hp -3db corner frequency 1 x 600khz 0 1 30khz 0 0 100hz table 16b. rx hp -3db corner frequency adjustment input conditions a3:a0 = 1000, d8 a3:a0 = 1000, d10 rxena rxhp rssi output 0 0 0 x no signal 0 0 1 0 no signal 0 0 1 1 rssi 0 1 0 x no signal 0 1 1 x rssi 1 x x x temperature sensor table 16c. rssi pin truth table data bit default description d13 0 d12 0 d11 0 set to 0 d10 0 enable tx vga gain programming serially. 0: tx vga gain programmed with external digital inputs (b6:b1); 1: tx vga gain programmed with data bits in the tx gain register (d5:d0). d9 1 d8 0 pa driver linearity. d9:d8 = 00: 50% current (minimum linearity); 01: 63% current; 10: 78% current; 11: 100% current (maximum linearity). d7 0 d6 0 tx vga linearity. d7:d6 = 00: 50% current (minimum linearity); 01: 63% current; 10: 78% current; 11: 100% current (maximum linearity). d5 0 d4 0 set to 0 d3 0 d2 0 tx upconverter linearity. d3:d2 = 00: 50% current (minimum linearity); 01: 63% current; 10: 78% current; 11: 100% current (maximum linearity). d1 0 d0 0 tx baseband gain. d1:d0 = 00: max baseband gain - 5db; 01: max baseband gain - 3db; 10: max baseband gain - 1.5db; 11: max baseband gain. table 17. tx linearity/baseband gain register (a3:a0 = 1001)
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics ______________________________________________________________________________________ 37 pa bias dac register definition (a3:a0 = 1010) this register controls the output current of the dac, which biases the external pa (see table 18). rx gain register definition (a3:a0 = 1011) this register sets the rx baseband and rf gain when a3:a0 = 1000, d12 = 1 (see table 19). tx vga gain register definition (a3:a0 = 1100) this register sets the tx vga gain when a3:a0 = 1001, d10 = 1 (see table 20). applications information mimo applications the max2828/max2829 support multiple input multiple output (mimo) applications where multiple transceivers are used in parallel. a special requirement for this appli- cation is that all receivers must maintain a constant rela- tive local oscillator phase, and that they continue to do so after any receive-transmit-receive mode switching. the same requirement holds for the transmitters they should all maintain a constant relative phase, and continue to do so after any transmit-receive-transmit mode switching. this feature is enabled in the max2828/max2829 by pro- gramming a3:a0 = 0010, d13 = 1 and a3:a0 = 0101, d13 = 1. the constant relative phases of the multiple transceivers are maintained in the transmit, receive, and standby modes of operation, as long as they are all using a common external reference frequency source (crystal oscillator). data bit default description d13 0 d12 0 d11 0 d10 0 set to 0 d9 1 d8 1 d7 1 d6 1 sets pa bias dac turn-on delay after txena is set high and a3:a0 = 0010, d10 = 1, in steps of 0.5s. d9:d6 = 0001 corresponds to 0s and 1111 corresponds to 7s. d5 0 d4 0 d3 0 d2 0 d1 0 d0 0 sets pa bias dac output current in steps of 5a. d5:d0 = 000000 corresponds to 0a and 111111 corresponds to 315a. table 18. pa bias dac register (a3:a0 = 1010) data bit default description d13 0 d12 0 d11 0 d10 0 d9 0 d8 0 d7 0 not used. for faster rx gain setting, only d6:d0 need to be programmed. d6 1 d5 1 rx lna gain control d4 1 d3 1 d2 1 d1 1 d0 1 rx vga gain control rx baseband and rf gain-control bits. d6 maps to digital input pin b7 and d0 maps to digital input pin b1. d6:d0 = 0000000 corresponds to minimum gain. table 19. rx gain register (a3:a0 = 1011) data bit default description d13 0 d12 0 d11 0 d10 0 d9 0 d8 0 d7 0 d6 0 not used. for faster tx vga gain setting, only d5:d0 need to be programmed. d5 0 d4 0 d3 0 d2 0 d1 0 d0 0 tx vga gain control. d5 maps to digital input pin b6 and d0 maps to digital input pin b1. d5:d0 = 000000 corresponds to minimum gain. table 20. tx vga gain register (a3:a0 = 1100)
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics 38 ______________________________________________________________________________________ 2 1 3 4 5 6 7 8 b6 v cc v cc b7 rxrfl txrfl+ txrfl- gnd rxrfh gnd txrfh+ b2 gnd b4 v cc v cc v cc v cc b5 b3 9 txrfh- txena pabias v cc v cc v cc v cc txbbi+ txbbi- txbbq+ txbbq- r bias v ref gnd din sclk rxena rxhp rssi v cc v cc bypass gnd gnd cpout gnd rosc ld b1 rxbbi+ rxbbi- rxbbq+ rxbbq- 10 11 12 13 15 16 17 18 19 20 14 21 22 23 24 25 26 27 28 29 33 32 31 34 35 36 37 38 39 40 41 42 55 54 53 52 51 50 49 48 47 46 45 44 43 56 30 tune cs max2829 shdn top view pin configurations (continued) rx gain control the receiver gain can be set either by the digital input pins b1 through b7 or by the internal rx gain register. the gain-control characteristic is shown in the typical operating characteristics . rssi the rssi output can be configured for two output voltage ranges: 0.5v to 2v and 0.5v to 2.5v (see table 16a). the rssi output is unaffected by the rx vga gain setting. they are capable of driving loads up to 10k ? || 5pf. tx vga gain control the tx gain can be set either by digital input pins b1 through b6 or by the internal tx vga gain register. the linearity of the tx blocks can also be adjusted (table 17). the tx vga gain-control characteristic is shown in the typical operating characteristics . loop filter the loop-filter topology and component values can be found in the max2828/max2829 evaluation kit data sheet. a 150khz loop bandwidth is recommended to ensure that the loop settles fast enough during tx/rx turnaround times. chip information transistor count: 42,998 process: bicmos
max2828/max2829 single-/dual-band 802.11a/b/g world-band transceiver ics maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ____________________ 39 ? 2004 maxim integrated products printed usa is a registered trademark of maxim integrated products. package information (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation go to www.maxim-ic.com/packages .) 56l thin qfn.eps

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