rf micro devices inc . 7628 thorndike road, greensboro, nc 27409 - 9421 ds1 40106 for sales or technical support, contact rfmd at +1.336.678.5570 or customerservice@rfmd.com . rf micro devices ? and rfmd ? 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 8 rffm8502 4.9ghz to 5.85ghz 802.11a/n wifi front end module the rffm8502 provides a complete integrated solution in a single front end module (fem) for wifi 802.11a/n systems. the ultra - small form factor and integrated matching minimizes the layout area in the customer's application and greatly reduces the number of external components. this simplifies the total front end solution by reducing the bill of mate rials, system footprint, and manufacturability cost. the rffm8502 integrates a 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 2.5mm x 2.5mm x 0. 45mm, 16 - pin qfn package. this module meets or exceeds the rf front end needs of ieee 802.11a/n wifi rf systems . tx pa_en nc vcc c_rx ant pdet nc nc rx 3 1 lna_en vcc vmode 12 2 13 11 10 9 8 7 6 5 4 14 15 16 vcc nc nc functional block diagram ordering information rffm8502sb standard 5 - piece sample bag rffm8502 sq standard 25- piece sample bag rffm8502 sr standard 100- pieces reel rffm8502 tr7 standard 2500 - piece reel rffm8502 pck - 410 fully assembled eval board w/ 5 - piece sample bag package: q fn, 16 - pin, 2.5mm x 2.5 mm x 0.45mm features p out = 17.5dbm, 11a, ofdm at 2.5% evm voltage range 3.0v to 4.8v input and output matched to 50 ? integrated 5ghz pa, sp2t, switch, lna, and pdet low height package, suited for sip and cob designs applications cellular handsets mobile devices tablets consumer electronics gaming n etbooks/notebooks tv/monitors/video rffm8502
rf micro devices inc . 7628 thorndike road, greensboro, nc 27409 - 9421 ds1 40106 for sales or technical support, contact rfmd at +1.336.678.5570 or customerservice@rfmd.com . the information in this publication is believed to be accurate. however, no responsibility is assumed by rf micro devices, in c. ("rfmd") for its use, nor for any infringement of patents or other rights of thi rd parties resulting from its use. no license is granted by implication or otherwise under any patent or patent rights of rfm d. rfmd reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 2 of 8 rffm8502 absolute maximum rat ings parameter rating unit dc supply voltage (no rf applied) 6 v pa enable voltage - 0.5 to 5 vdc dc supply current 500 ma storage temperature - 40 to +150 c maximum tx input power into 50 ? load for 11a/n (no damage) +10 dbm maximum rx input power for both lna_en mode and bypass mode (no damage) +10 dbm moisture sensitivity msl1 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 any 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 802.11a, 802.11n operating frequency 5.18 5.825 ghz extended frequency 4.9 5.15 ghz functional with derated performance extended operating temperature - 40 25 +85 c power supply v cc 3 3.3 4.35 v recommended operating voltage range extended v cc 3 3.3 4.8 v functional with derated performance control voltage - high 2.8 vcc v pa_en, crx, lna_en , vmode control voltage - low 0 0.2 v transmit (tx - ant) high power mode 802.11a/n p out = 17 dbm, t = 25 c, v cc = 3.3v , pa_en = high, lna_en = low, c_rx = low, vmode = low freq = 5.18ghz to 5.825ghz unless otherwise noted 802.11a/n output power 17 17.5 dbm t = 25c dynamic evm - nominal 2.5 3 % t = 25c, p out = 17dbm - 32 - 30.5 db 802.11a/n output power 1 4 15.5 dbm t= - 40 c to +85 c ; v cc =3.0v to 4.8 v dynamic evm 2.5 3 % - 32 - 30.5 db tx port return loss 10 12 db t= - 40 c to +85 c ; v cc =3.0v to 4.8v ant port return loss 10 12 db nominal gain 25 30 db t = 25c, v cc = 3.3v gain 22 30 db t= - 40 c to +85 c ; v cc =3.0v to 4.8v nominal operating current 225 250 ma p out = 17dbm, t=25c, v cc = 3.3v operating current 225 285 ma t= - 40 c to +85 c ; v cc =3.0v to 4.8v quiescent current 160 22 0 ma pa_en current 0 20 50 a leakage current 0 2 10 a v cc = 4.8v, rf off
rf micro devices inc . 7628 thorndike road, greensboro, nc 27409 - 9421 ds1 40106 for sales or technical support, contact rfmd at +1.336.678.5570 or customerservice@rfmd.com . the information in this publication is believed to be accurate. however, no responsibility is assumed by rf micro devices, in c. ("rfmd") for its use, nor for any infringement of patents or other rights of thi rd parties resulting from its use. no license is granted by implication or otherwise under any patent or patent rights of rfm d. rfmd reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 3 of 8 rffm8502 parameter specification unit condition min typ max transmit (tx - ant) high power mode (continued) 802.11a/n p out = 17 dbm, t = 25 c, v cc = 3.3v , pa_en = high, lna_en = low, c_rx = low, vmode = low, freq = 5.18ghz to 5.825ghz unless otherwise noted second harmonic - 35 - 30 dbm /mhz - 25 dbm /mhz t= - 40 c to +85 c ; v cc =3.0v to 4.8 v third harmonic - 50 - 41 power detector voltage 0.3 0.45 v t= - 40 c to +85 c ; v cc =3.0v to 4.8 v , p out = 0db m 0.6 0.9 v t= - 40 c to +85 c ; v cc =3.0v to 4.8 v , p out = 20db m transmit (tx - ant) low power mode 802.11a/n p out = 8 dbm, t = 2 5c , v cc = 3.3 v, pa_en = high, lna_en = low, c_rx = low, vmode = high , freq = 5.18ghz to 5.825ghz unless otherwise noted dynamic evm - nominal 2.5 3 % t = 25c, v cc = 3.3v, p out = 8dbm - 32 - 30.5 db dynamic evm 2.5 3 % t= - 40 c to +85 c ; v cc =3.0v to 4.8 v , p out = 6db m - 32 - 30.5 db operating current 125 16 0 ma vmode control line current 500 a receive (ant - rx) ? lna on t = 25c, v cc = 3.3v, lna_en = high, c_rx = h igh, vmode = low, pa_en = low nominal gain 8 12.5 17 db t = 25c, v cc = 3.3v gain 6 13 18 db t= - 40 c to +85 c ; v cc =3.0v to 4.8 v nf - nominal 2.5 3 db t = 25c, v cc = 3.3v noise figure 4.5 db t= - 40 c to +85 c ; v cc =3.0v to 4.8 v rx port return loss 5 10 db ant port return loss 5 10 db input ip3 3 5 dbm input p1db - 5 0 dbm i dd 15 2 1 ma t = 25c, v cc = 3.3v 1 6 2 2 ma t= - 40 c to +85 c ; v cc =3.0v to 4.8 v lna _en control current 30 100 a lna turn on time 200 500 ns receive (ant - rx) ? bypass mode t = 25c, v cc = 3.3v, lna_en = low, c_rx = h igh, vmode = low, pa_en = low insertion loss 5 8 13 db t= - 40 c to +85 c ; v cc =3.0v to 4.8 v 6 8 12 db t = 25c, v cc = 3.3v rx port return loss 8 10 db t= - 40 c to +85 c ; v cc =3.0v to 4.8 v ant port return loss 5 10 db input ip3 15 20 dbm input p1db 5 10 dbm
rf micro devices inc . 7628 thorndike road, greensboro, nc 27409 - 9421 ds1 40106 for sales or technical support, contact rfmd at +1.336.678.5570 or customerservice@rfmd.com . the information in this publication is believed to be accurate. however, no responsibility is assumed by rf micro devices, in c. ("rfmd") for its use, nor for any infringement of patents or other rights of thi rd parties resulting from its use. no license is granted by implication or otherwise under any patent or patent rights of rfm d. rfmd reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 4 of 8 rffm8502 parameter specification unit condition min typ max general specifications switch control current - high - each line 5 60 a switch control current - low each line 0.1 1 a switching speed 100 ns esd 1000 v pa turn - on time 200 500 ns 10% to 90% switch control logic truth table operating mode pa_en lna_en c_rx vmode standby low low low low 802.11a/n tx high power high low low low 802.11a/n tx low power high low low high 802.11a/n rx gain low high high low 802.11a/n rx bypass low low high low note: ? pa_en and tx switch control are tied together internally ? high = 2.8v to v cc , low = 0v to 0.2v
rf micro devices inc . 7628 thorndike road, greensboro, nc 27409 - 9421 ds1 40106 for sales or technical support, contact rfmd at +1.336.678.5570 or customerservice@rfmd.com . the information in this publication is believed to be accurate. however, no responsibility is assumed by rf micro devices, in c. ("rfmd") for its use, nor for any infringement of patents or other rights of thi rd parties resulting from its use. no license is granted by implication or otherwise under any patent or patent rights of rfm d. rfmd reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 5 of 8 rffm8502 evaluation board schematic
rf micro devices inc . 7628 thorndike road, greensboro, nc 27409 - 9421 ds1 40106 for sales or technical support, contact rfmd at +1.336.678.5570 or customerservice@rfmd.com . the information in this publication is believed to be accurate. however, no responsibility is assumed by rf micro devices, in c. ("rfmd") for its use, nor for any infringement of patents or other rights of thi rd parties resulting from its use. no license is granted by implication or otherwise under any patent or patent rights of rfm d. rfmd reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 6 of 8 rffm8502 pin out tx pa_en nc vcc c_rx ant pdet nc nc rx 3 1 lna_en vcc vmode 12 2 13 11 10 9 8 7 6 5 4 14 15 16 vcc nc nc package drawing
rf micro devices inc . 7628 thorndike road, greensboro, nc 27409 - 9421 ds1 40106 for sales or technical support, contact rfmd at +1.336.678.5570 or customerservice@rfmd.com . the information in this publication is believed to be accurate. however, no responsibility is assumed by rf micro devices, in c. ("rfmd") for its use, nor for any infringement of patents or other rights of thi rd parties resulting from its use. no license is granted by implication or otherwise under any patent or patent rights of rfm d. rfmd reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 7 of 8 rffm8502 pcb patterns note: shaded area represents pin 1 location
rf micro devices inc . 7628 thorndike road, greensboro, nc 27409 - 9421 ds1 40106 for sales or technical support, contact rfmd at +1.336.678.5570 or customerservice@rfmd.com . the information in this publication is believed to be accurate. however, no responsibility is assumed by rf micro devices, in c. ("rfmd") for its use, nor for any infringement of patents or other rights of thi rd parties resulting from its use. no license is granted by implication or otherwise under any patent or patent rights of rfm d. rfmd reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. 8 of 8 rffm8502 pin names and descriptions pin name description 1 nc* no connect. this pin is not connected internally and can be left floating or connected to ground. 2 rx rf output port for the 802.11a/n lna. this port is matched to 50? and dc blocked internally. 3 nc* no connect. this pin is not connected internally and can be left floating or connected to ground. 4 vcc supply voltage for 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 the pa and tx switch. see truth table for proper settings. 7 nc* no connect. this pin is not connected internally and can be left floating or connected to ground. 8 tx rf input port for the 802.11a/n pa. input is matched to 50? and dc blocked internally. 9 vmode high/low power mode control signal. vmode can be low or floating for nominal conditions (high power mode). applying 2.8v or greater to this pin enables low power mode. 10 vcc supply voltage for the first and second 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 schematic for biasing and bypassing components. 12 nc* no connect. 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 nc* not internally connected. this pin can be left floating or grounded. 15 c_rx receive switch control pin. see switch truth table for proper level. 16 lna_en control voltage for the lna. when this pin is set to a low logic state, the bypass mode is enabled. 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 a re recommended. *it is recommended to ground all nc pins.
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