attenuators - smt 5 5 - 28 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com hmc274qs16 / 274qs16e 1 db lsb gaas ic 5-bit digital attenuator, 0.7 - 2.7 ghz v01.0505 general description features functional diagram 1 db lsb steps to 31 db single positive control (+3 to +5v) per bit 0.5 db typical bit error small qsop16 plastic package included in the hmc-dk004 designer?s kit typical applications the hmc274qs16 / HMC274QS16E is ideal for: ? cellular/pcs/3g infrastructure ? 2.4 ghz ism radios ? wireless data the hmc274qs16 & HMC274QS16E are broadband 5-bit positive control gaas ic digital attenuators in 16 lead qsop plastic packages. covering 0.7 to 2.7 ghz the insertion loss is typically less than 2.3 db. the attenuator bit values are 1 (lsb), 2, 4, 8, and 16 db for a total attenuation of 31 db. accuracy is excellent at 0.5 db typical with an iip3 of up to +50 dbm. five bit control voltage inputs, toggled between 0 and +3 to +5 volts, are used to select each attenuation state. a single vdd bias of +3 to +5 volts applied through an external 5k ohm resistor is required. electrical speci cations, t a = +25 c, vdd = +3v to +5v & vctl = 0/vdd parameter frequency min. typical max. units insertion loss 0.7 - 1.4 ghz 1.4 - 2.3 ghz 2.3 - 2.7 ghz 2.0 2.3 2.5 2.4 2.7 3.1 db db db attenuation range 0.7 - 2.7 ghz 31 db return loss (rf1 & rf2, all atten. states) 0.7 - 1.4 ghz 1.4 - 2.7 ghz 10 12 15 17 db db attenuation accuracy: (referenced to insertion loss) all attenuation states all attenuation states all attenuation states 0.7 - 1.4 ghz 1.4 - 2.3 ghz 2.3 - 2.7 ghz 0.35 + 5% of atten. setting max 0.25 + 3% of atten. setting max 0.30 + 5% of atten. setting max db db db input power for 0.1 db compression vdd = 5v vdd = 3v 0.7 - 2.7 ghz 29 20 dbm dbm input third order intercept point (two-tone input power = 0 dbm each tone) vdd = 5v vdd = 3v 0.7 - 2.7 ghz 54 52 dbm dbm switching characteristics trise, tfall (10/90% rf) ton, toff (50% ctl to 10/90% rf) 0.7 - 2.7 ghz 560 600 ns ns
attenuators - smt 5 5 - 29 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com hmc274qs16 / 274qs16e return loss rf1, rf2 (only major states are shown) insertion loss normalized attenuation (only major states are shown) v01.0505 1 db lsb gaas ic 5-bit digital attenuator, 0.7 - 2.7 ghz note: all data typical over voltage (+3v to +5v). bit error vs. attenuation state bit error vs. frequency (only major states are shown) relative phase vs. frequency (only major states are shown) -5 -4 -3 -2 -1 0 0.5 1 1.5 2 2.5 3 +25 c +85 c -40 c insertion loss (db) frequency (ghz) -1.5 -1 -0.5 0 0.5 1 1.5 0 4 8 12 16 20 24 28 32 0.9 ghz 1.9 ghz 2.4 ghz bit error (db) attenuation state (db) -35 -30 -25 -20 -15 -10 -5 0 0.5 1 1.5 2 2.5 3 normalized attenuation (db) frequency (ghz) -100 -50 0 50 100 150 0.5 1 1.5 2 2.5 3 1 db 2 db 4 db 8 db 16 db 31 db relative phase (deg) frequency (ghz) -2 -1 0 1 2 0.5 1 1.5 2 2.5 3 1 db 2 db 4 db 8 db 16 db 31 db bit error (db) frequency (ghz) -30 -25 -20 -15 -10 -5 0 0.5 1 1.5 2 2.5 3 i.l. 1 db 2 db 4 db 8 db 16 db 31 db return loss (db) frequency (ghz)
attenuators - smt 5 5 - 30 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com truth table application circuit dc blocking capacitors c1 & c2 are required on rf1 & rf2. choose c1 = c2 = 100 ~ 300 pf to allow lowest customer speci c frequency to pass with minimal loss. r1 = 5k ohm is required to supply voltage to the circuit through either pin 9 or pin 16. control voltage input attenuation setting rf1 - rf2 v1 16 db v2 8 db v3 4 db v4 2 db v5 1 db high high high high high reference i.l. high high high high low 1 db high high high low high 2 db high high low high high 4 db high low high high high 8 db low high high high high 16 db low low low low low 31 db max. atten. any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. compression point & ip3 attenuation state (db) control voltage (v) input p1db (dbm) input p0.1db (dbm) input ip3 (dbm) +25c +85c -40c +25c +85c -40c +25c +85c -40c 1 5 32.3 31.8 32.9 29.4 28.8 29.8 54.7 49.1 52.2 2 5 32.3 31.8 32.8 29.2 28.6 29.4 52.2 49.1 52.2 4 5 32.8 32.1 33.3 29.4 28.7 29.3 54.1 48.65 52.7 1 3 24.8 25.7 25.2 19.7 18.6 21.1 52.2 48.1 52.5 2 3 24.7 24.1 25.1 19.7 18.3 21.0 52. 2 48.1 52. 2 4 3 26.0 25.6 26.6 19.6 18.6 21.1 53.1 47.65 53.2 hmc274qs16 / 274qs16e v01.0505 1 db lsb gaas ic 5-bit digital attenuator, 0.7 - 2.7 ghz
attenuators - smt 5 5 - 31 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com control voltages absolute maximum ratings outline drawing state bias condition low 0 to +0.2 v @ 20 ua max high vdd 0.2v @ 100 ua max note: vdd = +3v to 5v 0.2v control voltage (v1 - v5) vdd + 0.5 vdc bias voltage (vdd) +8.0 vdc storage temperature -65 to +150 c operating temperature -40 to +85 c rf input power (0.7 - 2.7 ghz) +30 dbm electrostatic sensitive device observe handling precautions part number package body material lead finish msl rating package marking [3] hmc274qs16 low stress injection molded plastic sn/pb solder msl1 [1] hmc274 xxxx HMC274QS16E rohs-compliant low stress injection molded plastic 100% matte sn msl1 [2] hmc274 xxxx [1] max peak re ow temperature of 235 c [2] max peak re ow temperature of 260 c [3] 4-digit lot number xxxx package information hmc274qs16 / 274qs16e v01.0505 1 db lsb gaas ic 5-bit digital attenuator, 0.7 - 2.7 ghz notes: 1. leadframe material: copper alloy 2. dimensions are in inches [millimeters]. 3. dimension does not include moldflash of 0.15mm per side. 4. dimension does not include moldflash of 0.25mm per side. 5. all ground leads must be soldered to pcb rf ground.
attenuators - smt 5 5 - 32 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com pin descriptions pin number function description interface schematic 1, 2, 8, 10 - 15 gnd this pin must be dc grounded. 3 - 7 v1 - v5 see truth table and control voltage table. 9rf1 this pin is dc coupled and matched to 50 ohm. blocking capacitors are required. 16 rf1 this pin is dc coupled and matched to 50 ohm. blocking capacitors are required. hmc274qs16 / 274qs16e v01.0505 1 db lsb gaas ic 5-bit digital attenuator, 0.7 - 2.7 ghz
attenuators - smt 5 5 - 33 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com evaluation pcb the circuit board used in the nal application should use rf circuit design techniques. signal lines should have 50 ohm impedance while the package ground leads should be connected directly to the ground plane similar to that shown below. a sufficient number of via holes should be used to connect the top and bottom ground planes. the evaluation circuit board as shown is available from hittite microwave corporation upon request. list of materials for evaluation pcb 104976 [1] * r2 - r6 = 100 ohm. these resistors are optional and may be used to enhance decoupling of the rf path from the control inputs. item description j1 - j2 pcb mount sma connector j3 - j11 dc pin r1 5k ohm resistor, 0402 chip r2 - r6 100 ohm resistor, 0402 chip c1, c2 0402 chip capacitor, select for lowest frequency of operation u1 hmc274qs16 / HMC274QS16E digital attenuator pcb [2] 104931 evaluation pcb [1] reference this number when ordering complete evaluation pcb [2] circuit board material: rogers 4350 hmc274qs16 / 274qs16e v01.0505 1 db lsb gaas ic 5-bit digital attenuator, 0.7 - 2.7 ghz
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