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| 1 of 14 optimum technology matching? applied gaas hbt ingap hbt gaas mesfet sige bicmos si bicmos sige hbt gaas phemt si cmos si bjt gan hemt functional block diagram rf micro devices?, rfmd?, optimum technology matching?, enabling wireless connectivity?, powerstar?, polaris? total radio? and ultimateblue? are trademarks of rfmd, llc. bluetooth is a trade- mark owned by bluetooth sig, inc., u.s.a. and licensed for use by rfmd. all other trade names, trademarks and registered tradem arks are the property of their respective owners. ?2012, rf micro devices, inc. product description 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or customerservice@rfmd.com . ordering information bifet hbt v c c 1 r x v r x g n d g n d 1 2 3 4 5 1 7 1 6 1 5 1 4 1 3 2 4 2 3 2 2 2 1 p d e t v r e g 3 7 8 p d o w n 9 g n d 1 0 t x i n 1 1 g n d v b i a s v c c 3 2 0 g n d g n d g n d v t x 6 v r e g 2 1 2 g n d v c c 2 1 8 g n d 1 9 g n d a n t i n p u t m a t c h b i a s i n t e r s t a g e m a t c h i n t e r s t a g e m a t c h v r e g 1 rffm4201 3.3v to 5v, 2.4ghz to 2.5ghz high power front end module rffm4201 is a 1 x 1 mimo module that is intently specified to address ieee 802.11b/g/n wifi 2.4ghz to 2.5ghz customer premises equipment (cpe) applica- tions. the module has an integrated three- stage linear power amplifier, tx harmonic filtering and spdt switch. the rffm4201 has fully matched input and output for a 50 ? system and incorporates matching networks optimized for linear output power and efficiency. the rffm4201 is housed in a 6mm x 6mm laminate. features ? 34db typical gain across frequency band ? p out = 25dbm <2.5% dynamic evm ? 2.4ghz to 2.5ghz frequency range ? integrated three-stage pa, filtering and t/r switch ? high impedance control integrated power detector applications ? wifi ieee802.11b/g/n applications ? customer premises equipment (cpe) ? spread-spectrum and mmds systems ds121008 ? ? package: 6mm x 6mm laminate rffm4201 3.3v to 5v, 2.4ghz to 2.5ghz high power front end module rffm4201pck-410 rffm4201 eval board and 5-piece bag rffm4201sb 5-piece bag rffm4201sr 100-piece reel rffm4201tr7 2500-piece reel RFFM4201SQ 25-piece bag
2 of 14 rffm4201 ds121008 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or customerservice@rfmd.com . absolute maximum ratings parameter rating unit supply voltage (rf applied) -0.5 to +5.25 v supply voltage (no rf applied) -0.5 to +6.0 v dc supply current 750 ma input rf power +10* dbm operating temperature -30 to +85 c storage temperature -40 to +150 c moisture sensitivity msl3 *maximum input power with a 50 ? load. parameter specification unit condition min. typ. max. typical conditions t = 25c, v cc = 5.0v, v reg = 2.9v, using an ieee802.11g waveform, 54mbps, unless other- wise noted frequency 2412 2484 mhz tx performance - 11g/n compliance with standard 802.11g/n 802.11n output power 25 25.5 dbm 802.11n ht20 and ht40 mcs7 11n dynamic evm 2.5 3 % 802.11n output power 25.8 dbm at v cc = 5.25v; 802.11n ht20 and ht40 mcs7 11n dynamic evm 2.5 3 % 802.11g output power 25.5 26 dbm 802.11g 64qam 54mbps 11g dynamic evm 2.5 3 % second harmonic -47 -42 dbm/mhz 11n ht40 mcs0/7. at rated p out third harmonic -50 -42 dbm/mhz 1 1n ht40 mcs0/7. at rated p out tx performance - spectral mask compliance with standard 802.11b/n 802.11b output power 27.5 dbm meet 802.11b 1mbps mask spec 802.11n output power 25 dbm meet 802.11n ht20/ht40 mcs7 mask tx performance - generic gain 31.5 34 37 db at rated p out gain variation over temp +/-2.5 db over temerature of -40 c to +85 ? c low gain mode - gain reduction 23 db drop in gain versus high gain mode by setting v reg2 = 0 power detect range 0.125 2.3 v p out = 5dbm to 30dbm power detect voltage 1.45 v at rated p out input return loss - tx_in pin 10 15 db in specified frequency band output return loss at ant pin 6 8 db in specified frequency band operating current 435 500 ma at rated p out quiescent current 160 210 ma v cc = 5.0, v reg = 2.9v and rf = off pae (power added efficiency) 20 % at rated p out (pa only) i reg 4 8.5 ma in tx mode p down current - v reg supply 7 10 ma p down = 0v, v reg = 2.9v, v cc = 5v p down current - v cc supply 0.51map down = 0v, v reg = 2.9v, v cc = 5v leakage current 0.2 0.6 ma v cc = 5v, v reg = 0v, p down = 0v power supply - v cc 55.25v caution! esd sensitive device. exceeding any one or a combination of the absolute maximum rating conditions may cause permanent damage to the device. ex tended application of absolute maximum rating conditions to the device may reduce device reliability. specified typical perfor- mance or functional operation of the devi ce under absolute maximum rating condi- tions is not implied. the information in this publication is believed to be accurate and reliable. however, no responsibility is assumed by rf micro devices, inc. ("rfmd") for its use, nor for any infringement of patents, or other rights of third parties, resulting from its use. no license is granted by implication or otherwise under any patent or patent rights of rfmd. rfmd reserves the right to change component circuitry, recommended appli- cation circuitry and specifications at any time without prior notice. rfmd green: rohs compliant per eu directive 2002/95/ec, halogen free per iec 61249-2-21, < 1000ppm each of antimony trioxide in polymeric materials and red phosphorus as a fl ame retardant, and <2% antimony in solder. 3 of 14 rffm4201 ds121008 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or customerservice@rfmd.com . parameter specification unit condition min. typ. max. typical conditions (continued) power supply - v reg1 , v reg2 , v reg3 2.8 2.9 3 v turn-on time from setting of v reg1 , v reg2 , v reg3 400 ns output stable to within 90% of final gain turn-off time from setting of v reg1 , v reg2 , v reg3 800 ns output stable to within 90% of final gain stability -25 30 dbm no spurs above -47dbm into 4:1 vswr cw p1db 32 dbm tx mode in 50% duty cycle rx performance rx insertion loss - rx 0.8 1 db noise figure 0.8 1 db in specified frequency band return loss - rx 10 16 db rx to ant isolation while in tx mode 30 db rx to tx isolation while in tx mode 25 30 db generic performance t/r switching time 0.5 ? s voltage logic high 2.75 2.9 3.4 v voltage logic low 0 0.3 v control current - logic high 1 10 ? a thermal r th_i 30 c/w esd human body model 250 v eia/jesd22-114a rf pins 500 v eia/jesd22-114a dc pins charge device model 500 v jesd22-c101c all pins truth table status pdown vtx vrx tx mode 1 1 0 rx mode 0 0 1 4 of 14 rffm4201 ds121008 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or customerservice@rfmd.com . pin names and descriptions pin name description 1vrx switch control for rx mode 2rx rf output is internally matched to 50 ? and dc blocked. 3gnd ground connection 4pdet power detector provides an output voltage proportional to the rf output power level. 5vreg3 third stage bias voltage. this pin requires regulated supply for best performance. 6vreg2 second stage bias voltage. this pin requires regulated supply for best performance. 7vreg1 first stage bias voltage. this pin requires regulated supply for best performance. 8pdown power down pin. apply <0.3v dc to power down the three power amplifier stages. apply 1.75v dc to 5.0v dc to power up. if function is not desired, pin may be connected to vreg. 9gnd ground connection 10 txin rf input is internally matched to 50 ? and dc blocked. 11 gnd ground connection 12 gnd ground connection 13 vbias supply voltage for the bias reference and control circuits. 14 vcc1 this pin is connected internally to the collector of the 1st stage rf device. to achieve specified performance, the layout of these pins sh ould match the recommended land pattern. 15 gnd ground connection 16 vcc2 this pin is connected internally to the collector of the 2nd stage rf device. to achieve specified performance, the layout of these pins sh ould match the recommended land pattern. 17 vcc3 this pin is connected internally to the collector of the 3rd stage rf device. to achieve specified performance, the layout of these pins sh ould match the recommended land pattern. 18 gnd ground connection 19 gnd ground connection 20 vtx switch control for tx mode 21 gnd ground connection 22 gnd ground connection 23 ant rf output is internally matched to 50 ? and dc blocked. 24 gnd ground connection pkg base gnd ground connection 5 of 14 rffm4201 ds121008 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or customerservice@rfmd.com . theory of operation and applications the rffm4201 is a single-chip integrated front end module (fem ) for high performance wifi applications in the 2.4ghz to 2.5ghz ism band. the fem greatly reduces the number of external components minimizing footpr int and assembly cost of the overall 802.11b/g/n solution. the rffm4201 has an integrated b/g/ n power amplifier, a power detector, and tx filtering and a switch, which is capable of switching between wifi rx, wifi tx operations. the device is manufactured using ingap hbt and phemt processes on a 6mm x 6mm x 0.95mm la minate package. the module meets or exceeds the rf front end needs of the 802.11b/g/n wifi rf systems. the rffm4201 is a very easy part to implement. to reduce the design and optimization pro- cess on the customer application, the evaluation board layout shou ld be copied as close as possible, in particular the ground and via configurations. gerber files of rfmd pcba designs will be provided upon request. the supply voltage lines should pres- ent an rf short to the fem by using bypass capacitors on the v cc traces. to simplify bias conditions, the rffm4201 requires a single positive supply voltage (v cc ), a positive current control bias (v reg ) supply, and a positive suppl y for switch control. the built-in power detector of the rffm4201 can be used as powe r monitor in the system. all inputs and outputs are internally matched to 50 ? . transmit path the rffm4201 has a typical gain of 34db form 2.4ghz to 2.5ghz, and delivers 25.5dbm typical output power in 11n ht20 mcs7 and 26dbm typical in 11g 54mbps. the rffm4201 requires a single positive of 5.0v to operate at full specifications. the vreg pin requires a regulated supply at 2.9v to maintain nominal bias current. out of band rejection the rffm4201 contains a low pass filtering (lpf) to attenuate th e 2nd harmonics to -47dbm/mhz (typical), to meet the out of band rejection requirements of the system for fcc specification. receive path the rx path has a 50 ? single-ended port. the receive port return loss is 9.6db minimum. in this mode, the fem has an inser- tion loss of 0.8db and 30db (typical) isolation to tx port. rffm4201 biasing instructions to the evaluation board: ? 802.11b/g/n transmit: ? connect the fem to a signal generator at the input and a spectr um analyzer at the output. set the pin at signal generator is at -20dbm. ?bias v cc to 5.0v first with v reg = 0.0v. if available, enable the current limiting function of the power supply to 750ma. ? refer to switch operational truth table to set th e control lines at the proper levels for wifi tx. ?turn on v reg to 2.9v (typ.). on v reg (of evaluation board), regulated supply is recommended. be extremely careful not to exceed 3.0v on the vreg pin or the part may exceed device current limits. ?turn on p down to 2.9v (typ.). pdown pin can be tied to v reg supply. note: it is important to adjust the v cc voltage source so that +5v is measur ed at the board; and the +2.9v of v reg is mea- sured at the board. the high collector currents will drop the co llector voltage significantly if long leads are used. adjust th e bias voltage to compensate. ? turn on rf of signal generator and gradually increase power level to the rated power. caution: if the input signal exceeds the rated power, the rffm4201 evaluation board can be permanently damaged. ? to turn off fem, turn off rf power of signal generator; then p down , v reg and v cc . ?802.11b/g/n receive ? to receive wifi set the switch control lines per the truth table. 6 of 14 rffm4201 ds121008 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or customerservice@rfmd.com . general layout guidelines and considerations: for best performance the following layout guidelines and consid erations must be followed regardless of final use or configura- tion: 1. the ground pad of the rffm4201 has special electrical and thermal grounding requirements. this pad is the main rf ground and main thermal conduit path for heat dissipation. th e gnd pad and vias pattern and size used on the rfmd eval- uation board should be replicated. the rfmd layout files in gerber format can be provided upon request. ground paths (under device) should be made as short as possible. 2. the rf lines should be well separated with solid ground in between the traces to eliminate any possible rf leakages or cross-talking. 3. bypass capacitors should be used on the dc supply lines. the vcc lines may be connected after the rf bypass and decou- pling capacitors to provide better isolation between each vcc line. rffm4201 tx production and system calibration recommendation: it is highly recommended to follow the dc biasing step an d rf power settings in the production calibration or test. 1. connect the rf cables of input and output then connect to the proper equipment. 2. apply v cc , then v reg as per the data sheet recommendations. 3. set rf input to the desired frequency and initial rf input powe r at -20dbm. this will insure the power amplifier is in a line ar state and not over driven. 4. set fem in tx mode by the truth table. 5. apply p down = high 6. sweep rf from low to high output power and take measurements at the rated output power. 7. ensure that the output power at turn on does not saturate the power amplifier. the recommended output power should be about 10db to 20db below the rated power. start calibrating from low to high power in reasonable steps until the rated power is reached then take the measurements. caution: if the input signal exceeds the maximum input power specifications, the rffm4201 could be permanently dam- aged. 7 of 14 rffm4201 ds121008 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or customerservice@rfmd.com . package drawing note: thermal vias for center slug ?b? should be incorporated in to the pcb design. the number and size of thermal vias will depend on the application. example of th e number and size of vias can be foun d on the rfmd evaluation board layout. 8 of 14 rffm4201 ds121008 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or customerservice@rfmd.com . pin out evaluation board top layer bottom layer v c c 1 r x v r x g n d g n d 1 2 3 4 5 1 7 1 6 1 5 1 4 1 3 2 4 2 3 2 2 2 1 p d e t v r e g 3 7 v r e g 1 8 p d o w n 9 g n d 1 0 t x i n 1 1 g n d v b i a s v c c 3 2 0 g n d g n d g n d v t x 6 v r e g 2 1 2 g n d v c c 2 1 8 g n d 1 9 g n d a n t 9 of 14 rffm4201 ds121008 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or customerservice@rfmd.com . evaluation board schematic j1 ant pdet vreg r2 ??? j3 txin c3 10 f vcc p1 1 2 3 4 hdr_1x4 vcc p2 hdr_1x7 1 2 3 4 5 6 7 vreg vreg2 c4 1 f 1 2 3 4 5 1 7 1 6 1 5 1 4 1 3 2 4 2 3 2 2 2 1 7 8 9 1 0 1 1 2 0 6 1 2 1 8 1 9 rffm4201 r1 20k ? pdown j2 rx vtx vrx pdet pdown c1 1000pf vrx vtx c2 dnp vreg2 r3 dnp r4 ??? r5 ??? r4 and r5 are place holder for higher v cc option. for v cc = 5v application, they can be removed. 10 of 14 rffm4201 ds121008 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or customerservice@rfmd.com . bill of materials description qty reference designator manufacturer manufacturer's p/n cap, 1000pf, 10%, 50v, x7r, 0402 1 c1 murata electronics grm155r71h102ka01d cap, 1 ? f, 10%, 10v, x5r, 0603 1 c4 murata electronics grm188r61a105ka61d cap, 10 ? f, 10%, 10v, x5r, 0805 1 c3 murata electronics rm21br61a106ke19l conn, sma, end lnch, univ, hyb mnt, flt 3 j1, j2, j3 molex sd-73251-4000 res, 20k, 5%, 1/16w, 0402 1 r1 panasonic industrial co erj-2gej203 res, 0 ? , 0402 3 r2, r4, r5 kamaya, inc rmc1/16sjpth dni 2 r3, c2 rffm4201 1 u1 rfmd rffm4201 11 of 14 rffm4201 ds121008 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or customerservice@rfmd.com . wifi 802.11n ht20 mcs7 performance plots in 100% duty cycle 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 evm (%) output power (dbm) evm (%) versus p out (dbm) -40c v cc = 5v dc v reg = 2.9v dc 2412mhz 2450mhz 2484mhz 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 evm (%) output power (dbm) evm (%) versus p out (dbm) 25c v cc = 5v dc v reg = 2.9v dc 2412mhz 2450mhz 2484mhz 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0 28.0 30.0 evm (%) output power (dbm) evm (%) versus p out (dbm) 85c v cc = 5v dc v reg = 2.9v dc 2412mhz 2450mhz 2484mhz 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 !" #$% 2412mhz 2450mhz 2484mhz 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 024681012141618202224262830 # !" #$% 2412mhz 2450mhz 2484mhz 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 024681012141618202224262830 & !" #$% 2412mhz 2450mhz 2484mhz 12 of 14 rffm4201 ds121008 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or customerservice@rfmd.com . wifi 802.11n ht20 mcs7 performance plots in 100% duty cycle 26.0 28.0 30.0 32.0 34.0 36.0 38.0 40.0 024681012141618202224262830 "'() "'() !" #$% 2412mhz 2450mhz 2484mhz "'() "'() # !" #$% 26.0 28.0 30.0 32.0 34.0 36.0 38.0 40.0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 "'() "'() & !" #$% 2412mhz 2450mhz 2484mhz 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 024681012141618202224262830 ! * !" #$% 2412mhz 2450mhz 2484mhz 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 ! * # !" #$% 2412mhz 2450mhz 2484mhz 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 ! * & !" #$% 2412mhz 2450mhz 2484mhz 13 of 14 rffm4201 ds121008 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or customerservice@rfmd.com . wifi 802.11n ht20 mcs7 performance plots in 50% duty cycle 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 evm (%) output power (dbm) evm (%) versus p out (dbm) -40c v cc = 5v dc v reg = 2.9v dc 2412mhz 2450mhz 2484mhz 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 evm (%) output power (dbm) evm (%) versus p out (dbm) 25c v cc = 5v dc v reg = 2.9v dc 2412mhz 2450mhz 2484mhz 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 024681012141618202224262830 evm (%) output power (dbm) evm (%) versus p out (dbm) 85c v cc = 5v dc v reg = 2.9v dc 2412mhz 2450mhz 2484mhz 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 i cc (a) output power (dbm) i cc (a) versus p out (dbm) -40c v cc = 5v dc v reg = 2.9v dc 2412mhz 2450mhz 2484mhz 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 024681012141618202224262830 i cc (a) output power (dbm) i cc (a) versus p out (dbm) 25c v cc = 5v dc v reg = 2.9v dc 2412mhz 2450mhz 2484mhz 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 024681012141618202224262830 i cc (a) output power (dbm) i cc (a) versus p out (dbm) 85c v cc = 5v dc v reg = 2.9v dc 2412mhz 2450mhz 2484mhz 14 of 14 rffm4201 ds121008 7628 thorndike road, greensboro, nc 27409-9421 for sales or technical support, contact rfmd at (+1) 336-678-5570 or customerservice@rfmd.com . wifi 802.11n ht20 mcs7 performance plots in 50% duty cycle 26.0 28.0 30.0 32.0 34.0 36.0 38.0 40.0 024681012141618202224262830 gain (db) output power (dbm) gain (db) versus p out (dbm) -40c v cc = 5v dc v reg = 2.9v dc 2412mhz 2450mhz 2484mhz 26.0 28.0 30.0 32.0 34.0 36.0 38.0 40.0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 gain (db) output power (dbm) gain (db) versus p out (dbm) 25c v cc = 5v dc v reg = 2.9v dc 2412mhz 2450mhz 2484mhz 26.0 28.0 30.0 32.0 34.0 36.0 38.0 40.0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 gain (db) output power (dbm) gain (db) versus p out (dbm) 85c v cc = 5v dc v reg = 2.9v dc 2412mhz 2450mhz 2484mhz 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 024681012141618202224262830 p det (v) output power (dbm) power detect (v) versus p out (dbm) -40c v cc = 5v dc v reg = 2.9v dc 2412mhz 2450mhz 2484mhz 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 p det (v) output power (dbm) power detect (v) versus p out (dbm) 25c v cc = 5v dc v reg = 2.9v dc 2412mhz 2450mhz 2484mhz 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 p det (v) output power (dbm) power detect (v) versus p out (dbm) 85c v cc = 5v dc v reg = 2.9v dc 2412mhz 2450mhz 2484mhz |
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