rf micro devices inc . 7628 thorndike road, greensboro, nc 27409 - 9421 ds1407 31 for sales or technical support, contact rfmd at +1.336.678.5570 or customerservice@rfmd.com . rf micro devices ? and rfm d ? are trademarks of rfmd, llc. bluetooth is a trademark owned by bluetooth sig, inc., u.s.a. and licensed for use by rfmd. all other trade names, trademarks, and registered trademarks are the property of their respective owners. ?2013, rf micro devices, inc. 1 of 10 r f fm8 528 wifi front end module 5180 mhz to 5825 mhz the RFFM8528 provides a complete integrated solution in a single front end module (fem) for wifi 802.11a/n/ac systems. the next generation ultra - small factor and integrated matching minimizes layout area in the customer?s application, reduces the bill of materials and greatly reduces the number of external components. performance is focused on a balance of efficiency to enable long battery life and linear power that increases the range of connection. the RFFM8528 integrates a 5ghz power amplifier (pa), single pole double throw switch (sp2t), lna with bypass, and a power detector coupler for improved accuracy. the device is provided in a 2.3mm x 2.3mm x 0.33mm, 16 - pin qfn package. 1 2 3 4 5 6 7 8 12 11 10 9 16 15 14 13 gnd rx gnd vcc pdet pa _ en gnd tx vmode vcc vcc gnd lna _ en nc gnd ant functional block diagram ordering information rffm8 528 sb standard 5 - piece bag rf fm8 528 sq s t andard 25- piece bag rf fm8 528 sr s tandard 100 - piece reel rf fm8 528 tr7 standard 2500 - piece reel rf fm8 528tr7 - 5k standard 5000 - piece reel rf fm8528 pc k - 410 fully assembled evaluation board w/ 5 - piece bag package: q fn, 16 - pin, 2. 3 mm x 2. 3 mm x 0. 33 mm max features p out = +17.5 dbm , 802.11ac , 80mhz mcs9 at 1.8% ( - 35db) dynamic evm high efficiency input and output matched to 50? integrated 5ghz pa, sp2t, lna with bypass and p det supports low power mode for increased efficiency operation optional logic schemes for control low height package, suited for sip and cob designs applications smartphones tablets netbooks/ notebooks mobile devices automotive RFFM8528
rf micro devices inc . 7628 thorndike road, greensboro, nc 27409 - 9421 ds1407 31 for sales or technical support, contact rfmd at +1.336.678.5570 or customerservice@rfmd.com . the inf ormation in this publication is believed to be accurate. however, no responsibility is assumed by rf micro devices, inc. ("rf md") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. no license is grante d by implication or otherwise under any patent or patent rights of rfmd. rfmd reserves the right to change component circuitr y, recommended application circuitry and specifications at any time without prior notice. 2 o f 10 rf fm8528 absolute maximum rat ing s parameter rating unit dc supply voltage (no rf applied) - 0.5 to + 6.0 v dc pa enable voltage - 0.5 to 5 v dc dc supply current 500 ma storage temperature - 40 to +150 oc maximum tx input power into 50? load for 11a/n (no damage) +12 dbm lna on maximum rx input power (no damage) +12 dbm bypass mode maximum rx input power (no damage) +25 dbm moisture sensitivity msl2 caution! esd sensitive device. rfmd green: rohs status based on eu directive 2011/65/eu (at time of this document revision) , halogen free per iec 61249 - 2 - 21, < 1000ppm each of antimony trioxide in polymeric materials and red phosphorus as a flame retardant, and <2% antimony in solder. exceeding a ny one or a combination of the absolute maximum rating conditions may cause permanent damage to the device. extended application of absolute maximum rating conditions to the device may reduce device reliability. specified typical performance or functional operation of the device under absolute maximum rating conditions is not implied. nominal operating parameters parameter specification unit condition min typ max compliance 802.11 a , 802.11 n , 802.11 ac operating frequency 5.18 5. 8 25 ghz exten ded frequency 4.9 5.925 ghz functional with reduced performance operating temperature - 2 0 25 + 65 oc extended operating temperature - 40 25 + 85 oc functional with reduced performance power supply v cc 3 .0 3.3 3. 6 v extended v cc 3 .0 4. 2 v functional w ith reduced performance control voltage - h igh 2.8 2.95 v cc v for pa_en, lna_en, vmode control voltage - l ow 0 0. 2 v for pa_en, lna_en, vmode transmit (tx - ant) high power mode v cc =3.3v; pa_en = high; lna_en = low; vmode = low; t=+25oc; unless otherwi se noted small signal gain (5.18 to 5.85ghz) 28 db gain f latness across the band - 1 1 db gain flatness a cross any 80mhz channel - 0.5 0.5 db 20mhz output power * 19 dbm 11n 2 0mh z dynamic evm 2 .5 % 802.11n ht20 mcs7 - 3 2 db 80mhz output power * 17.5 dbm 11ac 80 mhz dynamic evm 1 .8 % 802.11ac vht80 mcs9 - 35 db tx port return loss 12 18 db ant port return loss 14 20 db 802.11a 6mbps operating current 3 28 ma p out = + 22dbm 20mhz 802.11n operating current 2 50 ma p out = + 19 dbm 80mhz 802.11ac operating current 2 25 ma p out = + 17 .5 dbm second harmonic - 33 dbm/mhz fundamental frequency is between 4900 and 5850mhz; rf p out = + 22dbm . measured in 1mhz resolution bandwidth (fcc limit max = - 30dbm) third harmonic - 3 3 dbm/mhz
rf micro devices inc . 7628 thorndike road, greensboro, nc 27409 - 9421 ds1407 31 for sales or technical support, contact rfmd at +1.336.678.5570 or customerservice@rfmd.com . the inf ormation in this publication is believed to be accurate. however, no responsibility is assumed by rf micro devices, inc. ("rf md") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. no license is grante d by implication or otherwise under any patent or patent rights of rfmd. rfmd reserves the right to change component circuitr y, recommended application circuitry and specifications at any time without prior notice. 3 o f 10 rf fm8528 parameter specification unit condition min typ max transmit (tx - ant) high power mode (continued) v cc =3.3v; pa_en = high; lna_en = low; vmode = low; t=+25oc; unless otherwise noted margin to 20mhz spectral mask * 2 dbc 802.11n ht20 at p out = +20 dbm margin to 80mhz spectral mask * 2 dbc 802.11ac vht80 at p out = +20 dbm power detector voltage 0.8 1.05 v p out = +17.5 dbm variation across band - 0.5 0.5 db variation over temperature - 1.5 1.5 db transmit (tx - ant) low power mode v cc =3.3v; pa_en = high; lna_en = low; vmode = high ; t=+25oc; unless otherwise noted 20mhz output power * 9 dbm 11n 20mhz dynamic evm 1 % 802.11n ht20 mcs7 - 40 db 80mhz output power * 9 10 dbm 11ac 80mhz dynamic evm 1.2 % 802.11ac vht80 mcs9 - 38.5 db 20 mhz 802.11n current 1 45 ma p out = + 9dbm 80 mhz 802.11ac current 1 45 ma p out = +9 dbm receive (ant - rx) lna on v cc =3.3v; pa_en = low ; lna_en = high ; vmode = low; t=+25oc; unless otherwise noted gain 11 13 15 db gain f latness a cross b and - 1 1 db noise figure 2.5 3 db rx po rt return loss 12 db ant port return loss 8 db rx current 10 ma input p1db - 4 dbm receive (ant - rx) bypass mode v cc =3.3v; pa_en = low ; lna_en = low; vmode = low; t=+25oc; unless otherwise noted bypass loss 2 3 4.5 db gain flatness a cross band - 1 1 db rx port return loss 7 db ant port return loss 11 db general specifications ant to rx isolation 38 db switch in tx mod e tx to rx isolation 25 db pa_en current 250 ua lna_ en current 8 3 ua leakage current 0.1 2 5 ua v cc =3.3v, no rf applied, pa_en=lna_en=vmode=low switch control current ? high 5 100 ua per line switch control current ? low 0.5 2 ua switching speed 100 200 ns esd ? human body model 1000 v esd ? charge device model 1000 v p a turn - on time from pa_en edge 150 200 ns 10% to 90% of final gain
rf micro devices inc . 7628 thorndike road, greensboro, nc 27409 - 9421 ds1407 31 for sales or technical support, contact rfmd at +1.336.678.5570 or customerservice@rfmd.com . the inf ormation in this publication is believed to be accurate. however, no responsibility is assumed by rf micro devices, inc. ("rf md") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. no license is grante d by implication or otherwise under any patent or patent rights of rfmd. rfmd reserves the right to change component circuitr y, recommended application circuitry and specifications at any time without prior notice. 4 o f 10 rf fm8528 parameter specification unit condition min typ max general specifications pa turn - off time from pa_en edge 150 200 ns 90% to 10% of final gain ruggedness 10:1 vswr at typical operating conditions *for 4900mhz to 5150mhz, p out is reduced by 1db switch con trol logic truth table note : 1. tx low power mode is enabled either internally or with an option for external v mode . 2. high = 2.8 v to v cc , low = 0v to 0.2v. operating mode pa_en lna _ en vmode standby low low low 802.11a/n/ac tx high power mode high low low 802.11a/n/ac tx low power mode high low high 802.11a/n/ac tx low power mode (optional) high high low 802.11a/n/ac rx gain low hig h low 802.11a/n/ac rx bypass low low low
rf micro devices inc . 7628 thorndike road, greensboro, nc 27409 - 9421 ds1407 31 for sales or technical support, contact rfmd at +1.336.678.5570 or customerservice@rfmd.com . the inf ormation in this publication is believed to be accurate. however, no responsibility is assumed by rf micro devices, inc. ("rf md") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. no license is grante d by implication or otherwise under any patent or patent rights of rfmd. rfmd reserves the right to change component circuitr y, recommended application circuitry and specifications at any time without prior notice. 5 o f 10 rf fm8528 evaluation board schematic
rf micro devices inc . 7628 thorndike road, greensboro, nc 27409 - 9421 ds1407 31 for sales or technical support, contact rfmd at +1.336.678.5570 or customerservice@rfmd.com . the inf ormation in this publication is believed to be accurate. however, no responsibility is assumed by rf micro devices, inc. ("rf md") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. no license is grante d by implication or otherwise under any patent or patent rights of rfmd. rfmd reserves the right to change component circuitr y, recommended application circuitry and specifications at any time without prior notice. 6 o f 10 rf fm8528 timing diagram level is set per the data sheet vcc pa _ en vmode 0 . 2 usec time rffm 8528 transmit timing diagram power on / off sequence vmode is low during tx 0 . 2 usec 0 . 2 usec 0 . 2 usec apply 3 . 3 v to pins 4 , 10 , and 11 both controls must be off during transmit . the order is not critical . apply a max of 0 . 2 v to pins 9 and 16 for transmit : apply 2 . 9 v to pin 6 note : 1 . rf signal for each specific mode is applied after the dc bias is applied 2 . total on / off time includes from 10 % of control switching to 90 % of rf power 3 . listed values on diagram are typical . the maximum is 0 . 5 us for each mode lna _ en lna _ en is low during tx rf signal on time is 0 . 5 us max . set rf input to required level . range is set per the data sheet
rf micro devices inc . 7628 thorndike road, greensboro, nc 27409 - 9421 ds1407 31 for sales or technical support, contact rfmd at +1.336.678.5570 or customerservice@rfmd.com . the inf ormation in this publication is believed to be accurate. however, no responsibility is assumed by rf micro devices, inc. ("rf md") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. no license is grante d by implication or otherwise under any patent or patent rights of rfmd. rfmd reserves the right to change component circuitr y, recommended application circuitry and specifications at any time without prior notice. 7 o f 10 rf fm8528 timing sequence notes: 802.11a/n/ac transmit biasing instructions 1. connect the fem to a signal generator at the input and a spectrum analyzer at the output. terminate unused ports with 50 ohms . 2. set the power supply voltag e to 3.3v first with pa_en 0.2 v. leakage current will be <5ua typical. 3. refer to switch operational truth table to set the control lines at the proper levels for wifi tx. all off voltages must be 0. 2v (cannot be floating ) . 4. turn on pa_en with levels indicated in the data sheet. pa_en controls the current drawn by the 802.11a/n/ac power amplifier and the current should quickly rise to ~160ma +/ - 20ma for a typical part but the actual operating current will be based on the output power desired. be extremely careful not to exceed 5.0v on the pa_en pin or the part may exceed device current limits. 802.11a/n/ac transmit turn on sequence (see transmit timing diagram) 1. turn on power supply. 2. turn on pa_en. 3. apply rf. 802.11a/n/ac transmit turn off sequence 1. turn o ff rf. 2. turn off pa_en. 3. turn off power supply. 802.11a/n/ac receive 1. to receive wifi set the switch control lines per the truth table. 2. antenna port is input and rx port is output for this test. 3. follow timing diagram for biasing instructi ons.
rf micro devices inc . 7628 thorndike road, greensboro, nc 27409 - 9421 ds1407 31 for sales or technical support, contact rfmd at +1.336.678.5570 or customerservice@rfmd.com . the inf ormation in this publication is believed to be accurate. however, no responsibility is assumed by rf micro devices, inc. ("rf md") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. no license is grante d by implication or otherwise under any patent or patent rights of rfmd. rfmd reserves the right to change component circuitr y, recommended application circuitry and specifications at any time without prior notice. 8 o f 10 rf fm8528 pin out 1 2 3 4 5 6 7 8 12 11 10 9 16 15 14 13 gnd rx gnd vcc pdet pa _ en gnd tx vmode vcc vcc gnd lna _ en nc gnd ant package outline (dimensions in millimeters)
rf micro devices inc . 7628 thorndike road, greensboro, nc 27409 - 9421 ds1407 31 for sales or technical support, contact rfmd at +1.336.678.5570 or customerservice@rfmd.com . the inf ormation in this publication is believed to be accurate. however, no responsibility is assumed by rf micro devices, inc. ("rf md") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. no license is grante d by implication or otherwise under any patent or patent rights of rfmd. rfmd reserves the right to change component circuitr y, recommended application circuitry and specifications at any time without prior notice. 9 o f 10 rf fm8528 pcb patterns
rf micro devices inc . 7628 thorndike road, greensboro, nc 27409 - 9421 ds1407 31 for sales or technical support, contact rfmd at +1.336.678.5570 or customerservice@rfmd.com . the inf ormation in this publication is believed to be accurate. however, no responsibility is assumed by rf micro devices, inc. ("rf md") for its use, nor for any infringement of patents or other rights of third parties resulting from its use. no license is grante d by implication or otherwise under any patent or patent rights of rfmd. rfmd reserves the right to change component circuitr y, recommended application circuitry and specifications at any time without prior notice. 10 o f 10 rf fm8528 pin names and descriptions pin name description 1 gnd ground connection. this pin is not connected internally and can be left floating or co nnected to ground. 2 rx rf output port for the 802.11 a /n/ac lna. this port is matched to 50? and dc blocked internally . 3 gnd ground connection. this pin is not connected internally and can be left floating or connected to ground. 4 vcc supply voltage f or the lna and pa regulator . see applications schematic for biasing and bypassing components. 5 pdet power detector voltage for the tx path. may need external series r/shunt c to adjust voltage level and to filter rf noise. 6 pa_en control voltage for t he pa and tx switch. optional method to enact low power mode when placed in high state at same time with lna_en in high state. see truth table for proper voltage settings. 7 gnd ground connection. this pin is not connected internally and can be left floa ting or connected to ground. 8 tx rf input port for the 802.11a/n/ac pa. this port is matched to 50? and dc blocked internally . 9 vmode high/low p ower mode control signal. v mode can be l ow or left floating for nominal conditions (high power mode.) app lying 2.8v or greater to this pin enables low power mode 10 vcc supply voltage for the 1 st and 2 nd stage of the pa . see applications schematic for biasing and bypassing components. 11 vcc supply voltage for the final stage of the pa . see applications sc hematic for biasing and bypassing components. 12 gnd ground connection. this pin is not connected internally and can be left floating or connected to ground. 13 ant rf bidirectional antenna port matched to 50?. an external dc block is required. 14 gnd ground connection. this pin is not connected internally and can be left floating or connected to ground. 15 nc no connect. this pin is not connected internally. it can be left floating or connected to ground. 16 lna_en control voltage for the lna. when this pin is set to a l ow logic state, the b ypass m ode is enabled. optional method to enact low power mode when placed in high state at same time with pa_en in high st ate. see truth table for proper voltage settings. pkg base gnd ground connection. the backside of the package should be connected to the ground plane through a short path, i.e., pcb vias under the device are recommended.
|
