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general description the max2839 direct conversion, zero-if, rf transceiver is designed specifically for 2ghz 802.16e mimo mobile wimax systems. the device incorporates one transmit- ter and two receivers, with >40db isolation between each receiver. the max2839 completely integrates all circuitry required to implement the rf transceiver func- tion, providing rf to baseband receive path, and base- band to rf transmit path, vco, frequency synthesizer, crystal oscillator, and baseband/control interface. the device includes a fast-settling sigma-delta rf synthe- sizer with smaller than 40hz frequency steps and a crystal oscillator that allows the use of a low-cost crystal in place of a tcxo. the transceiver ic also integrates circuits for on-chip dc-offset cancellation, i/q error, and carrier leakage detection circuits. an internal trans- mit to receive loopback mode allows for receiver i/q imbalance calibration. the local oscillator i/q quadra- ture phase error can be digitally corrected in approxi- mately 0.125 steps. only an rf bandpass filter (bpf), crystal, rf switch, pa, and a small number of passive components are needed to form a complete wireless broadband rf radio solution. the max2839 completely eliminates the need for an external saw filter by implementing on-chip program- mable monolithic filters for both the receiver and trans- mitter, for all 2ghz and 802.16e profiles and wibro. the baseband filters along with the rx and tx signal paths are optimized to meet the stringent noise figure and linearity specifications. the device supports up to 2048 fft ofdm and implements programmable chan- nel filters for 3.5mhz to 20mhz rf channel bandwidths. the transceiver requires only 2? tx-rx switching time. the ic is available in a small 56-pin tqfn package measuring 8mm x 8mm x 0.8mm. applications 802.16e mobile wimax systems korean wibro systems proprietary wireless broadband systems 802.11g or n wlan with mrc or mimo down link features ? 2.3ghz to 2.7ghz wideband operation ? dual receivers for mimo, single transmitter ? complete rf transceiver, pa driver, and crystal oscillator 2.3db rx noise figure on each receiver -35db rx evm for 64qam signal 0dbm linear ofdm transmit power (64qam) -70dbr tx spectral emission mask -35dbc lo leakage automatic rx dc offset correction monolithic low-noise vco with -39dbc integrated phase noise programmable rx i/q lowpass channel filters programmable tx i/q lowpass anti-aliasing filters sigma-delta fractional-n pll with < 40hz step 62db tx gain control range with 1db step size, digitally controlled 95db rx gain control range with 1db step size, digitally controlled 60db analog rssi instantaneous dynamic range 4-wire spi digital interface i/q analog baseband interface digital tx/rx mode control digitally tuned crystal oscillator on-chip digital temperature sensor readout ? +2.7v to +3.6v transceiver supply ? low-power shutdown current ? small, 56-pin tqfn package (8mm x 8mm x 0.8mm) max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver ________________________________________________________________ maxim integrated products 1 19-3218; rev 1; 3/08 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. wimax is a trademark of the wimax forum. spi is a trademark of motorola, inc. part temp range pin- package pkg code max2839etn+td -40c to +85c 56 tqfn-ep* t5688+2 ordering information + denotes a lead-free package. t = tape and reel. * ep = exposed paddle. d = dry pack. pin configuration and block diagram/typical operating circuit appear at end of data sheet.
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver 2 _______________________________________________________________________________________ dc electrical characteristics table (max2839 evaluation kit, v cc _ = 2.7v to 3.6v, t a = -40? to +85?, rx set to the maximum gain. rxtx set according to operating mode, enable = cs = high, sclk = din = low, no input signal at rf inputs, all rf inputs and outputs terminated into 50 . 90mv rms differential i and q signals (1mhz) applied to i, q baseband inputs of transmitter in transmit mode, all registers set to rec- ommended settings and corresponding test mode, unless otherwise noted. typical values are at v cc_ = 2.8v, f lo = 2.5ghz and t a = +25?, unless otherwise noted.) (note 1) 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. parameter conditions min typ max units supply voltage v cc _ 2.7 3.6 v shutdown mode, t a = +25? 2 a clock-out only mode 1.4 3.5 standby mode 32 45 one receiver on 76 95 rx mode both receivers on 117 145 16 qam 116 tx mode 64 qam (note 4) 140 170 rx calibration mode, both receivers on 153 195 supply current tx calibration mode 102 135 ma d9:d8 = 00 in a4:a0 = 00100 0.85 1.0 1.2 d9:d8 = 01 in a4:a0 = 00100 1.1 d9:d8 = 10 in a4:a0 = 00100 1.2 rx i/q output common-mode voltage d9:d8 = 11 in a4:a0 = 00100 1.35 v tx baseband input common- mode voltage operating range dc-coupled 0.5 1.2 v tx baseband input bias current source current 10 20 ? logic inputs: rxtx, enable, sclk, din, cs , b7:b0, load, rxhp 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 ? caution! esd sensitive device absolute maximum ratings v cc_ pins to gnd..................................................-0.3v to +3.6v rf inputs: rxina+, rxina-, rxinb+, rxinb- to gnd .............................................ac-coupled only rf outputs: txout+, txout- to gnd.................-0.3v to +3.6v analog inputs: txbbi+, txbbi-, txbbq+, txbbq- to gnd..................................................-0.3v to +3.6v analog input: refclk, xtal1 .........................-0.3v to +3.6v p-p analog outputs: rxbbia+, rxbbia-, rxbbqa+, rxbbqa-, rxbbib+, rxbbib-, rxbbqb+, rxbbqb-, cpout+, cpout-, pabias, rssi to gnd.........................-0.3v to +3.6v digital inputs: rxtx, cs , sclk, din, b0?7, load, rxhp, enable to gnd .............-0.3v to +3.6v digital outputs: dout, clkout ..........................-0.3v to +3.6v bias voltages: vcobyp .......................................-0.3v to +3.6v short-circuit duration on all output pins ...............................10s rf input power: all rxin_ ..............................................+15dbm rf output differential load vswr: all txout .......................6:1 continuous power dissipation (t a = +70?) 56-pin tqfn (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?
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver _______________________________________________________________________________________ 3 parameter conditions min typ max units digital input current low, i il -1 +1 ? logic outputs: dout, clkout digital output voltage high, v oh sourcing 100? v cc - 0.4 v digital output voltage low, v ol sinking 100? 0.4 v dc electrical characteristics table (continued) (max2839 evaluation kit, v cc _ = 2.7v to 3.6v, t a = -40? to +85?, rx set to the maximum gain. rxtx set according to operating mode, enable = cs = high, sclk = din = low, no input signal at rf inputs, all rf inputs and outputs terminated into 50 . 90mv rms differential i and q signals (1mhz) applied to i, q baseband inputs of transmitter in transmit mode, all registers set to rec- ommended settings and corresponding test mode, unless otherwise noted. typical values are at v cc_ = 2.8v, f lo = 2.5ghz and t a = +25?, unless otherwise noted.) (note 1) parameter conditions min typ max units rf input to i, q baseband-loaded output rf input frequency range 2.3 2.7 ghz peak-to-peak gain variation over rf input frequency range tested at band edges and band center 0.8 db rf input return loss all lna settings 12 db maximum gain, b7:b0 = 0000000 90 99 total voltage gain t a = -40? to +85? minimum gain, b7:b0 = 1111111 5 13 db from max rf gain to max rf gain - 8db 8 from max rf gain to max rf gain - 16db 16 rf gain steps from max rf gain to max rf gain - 32db 32 db any rf or baseband gain change; gain settling to within ?db of steady state; rxhp = 1 200 gain change settling time any rf or baseband gain change; gain settling to within ?.1db of steady state; rxhp = 1 2000 ns baseband gain range from maximum baseband gain (b5:b0 = 000000) to minimum gain (b5:b0 = 111111), t a = -40? to +85? 58 63 66 db baseband gain minimum step size 1db voltage gain = 65db with max rf gain (b7:b6 = 00) 2.3 v ol tag e g ai n = 50d b w i th m ax rf g ai n - 8d b ( b7:b6 = 01) 5.5 voltage gain = 45db with max rf gain - 16db (b7:b6 = 10) 13 dsb noise figure voltage gain = 15db with max rf gain - 32db (b7:b6 = 11) 27 db ac electrical characteristics table?x mode (max2839 evaluation kit, v cc_ = 2.8v, t a = +25?, f rf = 2.4999ghz, f lo = 2.5ghz; baseband output signal frequency = 100khz, f ref = 40mhz, enable = rxtx = cs = high, sclk = din = low, with power matching for the differential rf pins using the typical applications circuit and registers set to default settings and corresponding test mode, unless otherwise noted. lowpass filter is set to 10mhz rf channel bw. unmodulated single tone rf input signal is used with specifications which normally apply over the entir e operating conditions, unless otherwise indicated.) (note 1)
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver 4 _______________________________________________________________________________________ parameter conditions min typ max units agc set for -65dbm wanted signal, max rf gain (b7:b6 = 00) -13 agc set for -55dbm wanted signal, max rf gain - 8db (b7:b6 = 01) -9 agc set for -40dbm wanted signal, max rf gain - 16db (b7:b6 = 10) -7 out-of-band input ip3 (note 2) agc set for -30dbm wanted signal, max rf gain - 32db (b7:b6 = 11) +16 dbm max rf gain (b7:b6 = 00) -37 max rf gain - 8db (b7:b6 = 01) -29 max rf gain - 16db (b7:b6 = 01) -21 inband input p-1db max rf gain - 32db (b7:b6 = 11) -4 dbm maximum output signal level over passband frequency range; at any gain setting; 1db compression point 1.5 v p-p i/q gain imbalance 100khz iq baseband output; 1 variation 0.1 db i/q phase error 100khz iq baseband output; 1 variation 0.125 degrees minimum differential resistance 10 k rx i/q output load impedance (r || c) maximum differential capacitance 5 pf loopback gain (for receiver i/q calibration) transmitter i/q input to receiver i/q output; transmitter b6:b1 = 000011, receiver b5:b0 = 101000 programmed through spi -5 0 +5 db i/q output dc droop after switching rxhp to 0; average over 1? after any gain change, or 2? after receive enabled with 100hz ac-coupling 1 v/s i/q static dc offset no rf input signal; measure at 3? after receive enable; rxhp = 1 for 0 to 2? and set to 0 after 2?, 1 variation 2mv isolation between rx channels a and b any rf gain settings 40 db receiver baseband filters at 15mhz 57 at 20mhz 75 baseband filter rejection at > 40mhz 90 db rxhp = 1 (used before agc completion) 650 d5:d4 = 00 0.1 d5:d4 = 01 1 d5:d4 = 10 30 baseband highpass filter corner frequency rxhp = 0 (used after agc completion) address a4:a0 = 01110 d5:d4 = 11 100 khz ac electrical characteristics table?x mode (continued) (max2839 evaluation kit, v cc_ = 2.8v, t a = +25?, f rf = 2.4999ghz, f lo = 2.5ghz; baseband output signal frequency = 100khz, f ref = 40mhz, enable = rxtx = cs = high, sclk = din = low, with power matching for the differential rf pins using the typical applications circuit and registers set to default settings and corresponding test mode, unless otherwise noted. lowpass filter is set to 10mhz rf channel bw. unmodulated single tone rf input signal is used with specifications which normally apply over the entire operating conditions, unless otherwise indicated.) (note 1)
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver _______________________________________________________________________________________ 5 parameter conditions min typ max units a4:a0 = 00100 serial bits d9:d6 = 0000 1.75 a4:a0 = 00100 serial bits d9:d6 = 0001 2.25 a4:a0 = 00100 serial bits d9:d6 = 0010 3.5 a4:a0 = 00100 serial bits d9:d6 = 0011 5.0 a4:a0 = 00100 serial bits d9:d6 = 0100 5.5 a4:a0 = 00100 serial bits d9:d6 = 0101 6.0 a4:a0 = 00100 serial bits d9:d6 = 0110 7.0 a4:a0 = 00100 serial bits d9:d6 = 0111 8.0 a4:a0 = 00100 serial bits d9:d6 = 1000 9.0 a4:a0 = 00100 serial bits d9:d6 = 1001 10.0 a4:a0 = 00100 serial bits d9:d6 = 1010 12.0 a4:a0 = 00100 serial bits d9:d6 = 1011 14.0 a4:a0 = 00100 serial bits d9:d6 = 1100 15.0 a4:a0 = 00100 serial bits d9:d6 = 1101 20.0 a4:a0 = 00100 serial bits d9:d6 = 1110 24.0 rf channel bw supported by baseband filter a4:a0 = 00100 serial bits d9:d6 = 1111 28.0 mhz 0 to 2.3mhz for bw = 5mhz 1.3 baseband gain ripple 0 to 4.6mhz for bw = 10mhz 1.3 db p-p 0 to 2.3mhz for bw = 5mhz 90 baseband group delay ripple 0 to 4.6mhz for bw = 10mhz 50 ns p-p at 3.3mhz 6 baseband filter rejection for 5mhz rf channel bw at > 21mhz 85 db at 6.7mhz 6 baseband filter rejection for 10mhz rf channel bw at > 41.6mhz 85 db rssi rssi minimum output voltage r load 10k 0.4 v rssi maximum output voltage r load 10k 2.2 v rssi slope 30 mv/db +32db signal step 200 rssi output settling time to within 3db of steady state -32db signal step 800 ns ac electrical characteristics table?x mode (continued) (max2839 evaluation kit, v cc_ = 2.8v, t a = +25?, f rf = 2.4999ghz, f lo = 2.5ghz; baseband output signal frequency = 100khz, f ref = 40mhz, enable = rxtx = cs = high, sclk = din = low, with power matching for the differential rf pins using the typical applications circuit and registers set to default settings and corresponding test mode, unless otherwise noted. lowpass filter is set to 10mhz rf channel bw. unmodulated single tone rf input signal is used with specifications which normally apply over the entire operating conditions, unless otherwise indicated.) (note 1)
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver 6 _______________________________________________________________________________________ parameter conditions min typ max units tx baseband i/q inputs to rf outputs rf output frequency range 2.3 2.7 ghz peak-to-peak peak gain variation over rf band output optimally matched over 200mhz rf bw 2.5 db total voltage gain max gain -3db; at unbalanced 50 matched output 12 db max output power over frequency for any given 200mhz band 64 qam ofdm signal conforming to spectral emission mask and -36db evm after i/q imbalance calibration by modem (note 3) 0 dbm rf output return loss given 200mhz band in the 2.3ghz to 2.7ghz range, for which the matching has been optimized 8db rf gain control range b6:b1 = 000000 to 111111 62 db unwanted sideband suppression without calibration by modem, and excludes modem i/q imbalance; p out = 0dbm 45 dbc b1 1 b2 2 b3 4 b4 8 b5 16 rf gain control binary weights b6 32 carrier leakage relative to 0dbm output power; without calibration by modern -35 dbc differential resistance 100 k tx i/q input impedance (r||c) differential capacitance 0.5 pf 0 to 2.3mhz 0.2 baseband frequency response for 5mhz rf channel bw at > 25mhz 80 db 0 to 4.6mhz 0.2 baseband frequency response for 10mhz rf channel bw at > 41.6mhz 80 db 0 to 2.3mhz (bw = 5mhz) 20 baseband group delay ripple 0 to 4.6mhz (bw = 10mhz) 12 ns ac electrical characteristics table?x mode (max2839 evaluation kit, v cc_ = 2.8v, t a = +25?, f rf = 2.501ghz, f lo = 2.5ghz, f ref = 40mhz, enable = cs = high, rxtx = sclk = din = low, with power matching for the differential rf pins using the typical applications and registers set to default settings and corresponding test mode, unless otherwise noted. lowpass filter is set to 10mhz rf channel bw. 1mhz 90mv rms cosine and sine signals applied to i/q baseband inputs of transmitter (differential dc coupled)). (note 1)
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver _______________________________________________________________________________________ 7 parameter conditions min typ max units rf channel center frequency range 2.3 2.7 ghz channel center frequency programming minimum step size 39 hz charge-pump comparison frequency 11 40 mhz reference frequency range 11 40 80 mhz reference frequency input levels ac-coupled to refclk pin 0.8 v p-p resistance (refclk pin) 10 k reference frequency input impedance (r||c) capacitance (refclk pin) 1 pf programmable reference divider values 1 2 4 closed-loop integrated phase noise integrate phase noise from 200hz to 5mhz; charge- pump comparison frequency = 40mhz -39 dbc charge-pump output current on each differential side 0.8 ma f offset = 0 to 1.8mhz -40 f offset = 1.8mhz to 7mhz -70 close-in spur level f offset > 7mhz -80 dbc reference spur level -85 dbc turnaround lo frequency error relative to steady state; measured 35s after tx-rx or rx-tx switching instant, and 4s after any receiver gain changes 50 hz temperature range over which vco maintains lock relative to the ambient temperature t a , as long as the vco lock temperature range is within operating temperature range t a 40 c reference output clock divider values 2 output clock drive level 20mhz output, 1x drive setting 1.5 v p-p resistance 10 k output clock load impedance (r||c) capacitance 2 pf ac electrical characteristics table?requency synthesis (max2839 evaluation kit, v cc_ = 2.8v, t a = +25?, f lo = 2.5ghz, f ref = 40mhz, cs = high, sclk = din = low, pll 3db loop noise bandwidth = 120khz. vco and rf synthesis enabled, unless otherwise noted.) (note 1)
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver 8 _______________________________________________________________________________________ parameter conditions min typ max units pa bias dac: voltage mode output high level 10ma source current v cc - 0.1 v output low level 100a sink current 0.1 v turn-on time excludes programmable delay of 0 to 7s in steps of 0.5s 200 ns crystal oscillator maximum capacitance, a4:a0 = 11000, d6:d0 = 1111111 15.5 on-chip tuning capacitance range minimum capacitance, a4:a0 = 11000, d6:d0 = 0000000 0.5 pf on-chip tuning capacitance step size 0.12 pf on-chip temperature sensor t a = +25c 01111 t a = +85c 11101 digital output code readout at dout pin through spi a4:a0 = 01011, d4:d0 t a = -40c 00001 ac electrical characteristics table?iscellaneous blocks (max2839 evaluation kit, v cc = 2.8v, f ref = 40mhz, cs = high, sclk = din = low, and t a = +25?, unless otherwise noted.) (note 1) parameter symbol conditions min typ max units system timing rx to tx 2 turnaround time measured from tx or rx enable edge; signal settling to within 2db of steady state tx to rx, rxhp = 1 2 ? tx turn-on time (from standby mode) measured from tx-enable edge; signal settling to within 2db of steady state 2s tx turn-off time (to standby mode) from tx-disable edge 0.1 ? rx turn-on time (from standby mode) measured from rx-enable edge; signal settling to within 2db of steady state 2s rx turn-off time (to standby mode) from rx-disable edge 0.1 ? transmitter and receiver parallel gain control load rising edge setup time b7:b0 stable to load rising edge 10 ns load rising edge hold time load rising edge to b7:b0 stable 10 ns ac electrical characteristics table?iming (max2839 evaluation kit, v cc_ = 2.8v, f lo = 2.5ghz, f ref = 40mhz, cs = high, sclk = din = low, 3db pll noise bandwidth = 120khz, and t a = +25?, unless otherwise noted.) (note 1)
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver _______________________________________________________________________________________ 9 parameter symbol conditions min typ max units load falling edge setup time b7:b0 stable to load falling edge 10 ns load falling edge hold time load falling edge to b7:b0 stable 10 ns load rise and fall time between 10% and 90% of static levels 100 ns 4-wire serial parallel interface timing (see figure 1) 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 rising edge of cs and the next rising edge of sclk t cs1 6ns clock frequency f clk 45 mhz rise time t r 0.1/f clk ns fall time t f 0.1/f clk ns sclk falling edge to valid dout t d 12.5 ns ac electrical characteristics table?iming (continued) (max2839 evaluation kit, v cc_ = 2.8v, f lo = 2.5ghz, f ref = 40mhz, cs = high, sclk = din = low, 3db pll noise bandwidth = 120khz, and t a = +25?, unless otherwise noted.) (note 1) note 1: min/max limits are production tested at t a = +85?. min/max limits at t a = -40? and t a = +25? are guaranteed by design and characterization. the power-on register settings are not production tested. load register setting 500ns after v cc is applied. note 2: two tones at +20mhz and +39mhz offset with -35dbm/tone. measure im3 at 1mhz. note 3: gain adjusted over max gain and max gain -3db. optimally matched over given 200mhz band. note 4: tx mode supply current is specified for 64 qam while achieving the tx output spectrum mask shown in the typical operating characteristics . the supply current can be reduced for 16 qam signal by adjusting the tx bias settings through the spi.
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver 10 ______________________________________________________________________________________ typical operating characteristics (v cc = 2.8v, t a = +25?, f lo = 2.5ghz, f ref = 40mhz, cs = high, rxhp = sclk = din = low, rf bw = 10mhz, tx output at 50 unbalanced output of balun, using the max2839 evalutation kit.) single rx supply current vs. supply voltage supply voltage (v) supply current (ma) max2839 toc01 2.7 3.0 3.3 3.6 60 65 70 75 80 85 90 t a = -40 c t a = +25 c t a = +85 c dual rx supply current vs. supply voltage supply voltage (v) supply current (ma) max2839 toc02 2.7 3.0 3.3 3.6 80 90 100 110 120 130 140 t a = -40 c t a = +25 c t a = +85 c noise figure vs. baseband gain setting baseband vga code noise figure (db) max2839 toc03 0 9 18 27 36 45 54 63 0 10 20 30 40 50 lna = max lna = max - 8db lna = max - 16db lna = max - 32db rx voltage gain vs. frequency frequency (mhz) gain (db) max2839 toc04 2300 2380 2460 2540 2620 2700 40 50 60 70 80 90 100 110 lna = max lna = max - 8db lna = max - 16db lna = max - 32db rx voltage gain vs. frequency (maximum lna gain) frequency (mhz) gain (db) max2939 toc05 2300 2380 2460 2540 2620 2700 95 97 99 101 103 t a = -40 c t a = +25 c t a = +85 c rx voltage gain vs. baseband gain setting baseband vga code voltage gain (db) max2839 toc06 0 9 18 27 36 45 54 63 0 40 80 120 lna = max lna = max - 8db lna = max - 16db lna = max - 32db rx output v 1db vs. gain setting baseband vga code output v 1db (v rms ) max2839 toc07 0 9 18 27 36 45 54 63 0 0.4 0.8 1.2 1.6 rx isolation vs. lna gain setting lna gain setting (db) receiver isolation (db) max2839 toc08 -35 -25 -15 -5 5 30 35 40 45 50 lna = max lna = max - 8db lna = max - 16db lna = max - 32db
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver ______________________________________________________________________________________ 11 typical operating characteristics (continued) (v cc = 2.8v, t a = +25?, f lo = 2.5ghz, f ref = 40mhz, cs = high, rxhp = sclk = din = low, rf bw = 10mhz, tx output at 50 unbalanced output of balun, using the max2839 evalutation kit.) rx evm vs. p in (channel bandwidth = 10mhz, 64 qam fusc) p in (dbm) evm (%) max2839 toc09 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 0 2 4 6 8 10 12 14 16 18 20 22 lna = max lna = max - 32db lna = max - 16db lna = max - 8db rx evm vs. v out (channel bandwidth = 10mhz, 64 qam fusc) v out (dbv rms ) evm (%) max2839 toc10 -30 -26 -22 -18 -14 -10 -6 0 4 8 12 lna = max p in = -50dbm wimax evm vs. ofdm jammer (10mhz channel bandwidth, 64 qam fusc) p wanted = p sensitivity + 3db = -70.3dbm at antenna (including 4db front-end loss). evm at p sensitivity = 6.37%, without jammer. p jammer at antenna (dbm) evm (%) max2839 toc11 -70 -60 -50 -40 -30 -20 0 2 4 6 8 10 12 14 f offset =10mhz f offset = 20mhz -130 -110 -120 -90 -100 -70 -80 -60 -40 -50 -30 0 26.5g rx emission spectrum at lna input (tx off, lna gain = max) max2839 toc12 frequency (hz) (db)
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver 12 ______________________________________________________________________________________ 33.90 34.20 34.80 34.50 35.10 35.40 -89.0 -85.0 -77.0 -81.0 -73.0 -69.0 rx a input differential impedance vs. frequency max2839 toc13 frequency (ghz) real component ( ) imaginary component ( ) 2.3 2.5 2,4 2.6 2.7 real imaginary rx b input differential impedance vs. frequency max2839 toc14 frequency (ghz) real component ( ) imagianry component ( ) 2.6 2.5 2.4 33.90 34.00 34.10 34.20 34.30 34.40 34.50 34.60 34.70 34.80 33.80 -84.0 -82.0 -80.0 -78.0 -76.0 -74.0 -72.0 -70.0 -68.0 -66.0 -86.0 2.3 2.7 imaginary real rx input return loss vs. frequency frequency (mhz) rx input return loss (db) max2839 toc15 2300 2400 2500 2600 2700 -70 -60 -50 -40 -30 -20 -10 0 lna = max lna = max - 8db lna = max - 16db lna = max - 32db rssi voltage vs. input power p in (dbm) rssi voltage (v) max2839 toc16 -110 -80 -50 -20 10 0 0.5 1.0 1.5 2.0 2.5 lna = max lna = max - 8db lna = max - 16db lna = max - 32db rx rssi step response (+32db signal step) max2839 toc17 200ns/div 3v 0v 1.45v 0.45v lna gain control rssi output rx rssi step response (-32db signal step) max2839 toc18 200ns/div 3v 0v 1.45v 0.45v lna gain control rssi typical operating characteristics (continued) (v cc = 2.8v, t a = +25?, f lo = 2.5ghz, f ref = 40mhz, cs = high, rxhp = sclk = din = low, rf bw = 10mhz, tx output at 50 unbalanced output of balun, using the max2839 evalutation kit.)
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver ______________________________________________________________________________________ 13 rx lpf group delay vs. frequency frequency (mhz) lpf group delay (ns) max2839 toc19 0246810121416 0 50 100 150 200 250 300 350 channel bw = 5mhz channel bw = 8mhz channel bw = 9mhz channel bw = 10mhz rx dc offset settling response (+8db bb vga gain step) max2839 toc20 10 s/div 2v/div 0v 0v 5mv/div vga gain control rx dc offset settling response (-8db bb vga gain step) max2839 toc21 10 s/div 2v/div 0v 0v 5mv/div vga gain control rx dc offset settling response (-16db bb vga gain step) max2839 toc22 10 s/div 2v/div 0v 0v 5mv/div vga gain control rx dc offset settling response (-32db bb vga gain step) max2839 toc23 10 s/div 2v/div 0v 0v 5mv/div vga gain control rx bb vga settling response (+8db bb vga gain step) max2839 toc24 200ns/div 2v/div 0v 1v/div vga gain control rx bb vga settling response (-8db bb vga gain step) max2839 toc25 200ns/div 2v/div 0v 1v/div vga gain control rx bb vga settling response (-16db bb vga gain step) max2839 toc26 200ns/div 2v/div 0v 1v/div vga gain control rx bb vga settling response (-32db bb vga gain step) max2839 toc27 200ns/div 2v/div 0v 1v/div vga gain control typical operating characteristics (continued) (v cc = 2.8v, t a = +25?, f lo = 2.5ghz, f ref = 40mhz, cs = high, rxhp = sclk = din = low, rf bw = 10mhz, tx output at 50 unbalanced output of balun, using the max2839 evalutation kit.)
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver 14 ______________________________________________________________________________________ rx lna settling response (max to max - 8db) max2839 toc28 200ns/div 2v/div 0v 1v/div lna gain control rx lna settling response (max to max - 32db) max2839 toc29 200ns/div 2v/div 0v 1v/div lna gain control rx bb frequency response frequency (mhz) response (db) max2839 toc30 -70 -60 -50 -40 -30 -20 -10 0 10 0.1 1 10 100 channel bw = 1.5mhz channel bw = 5mhz channel bw = 10mhz channel bw = 28mhz rx bb frequency response frequency (mhz) response (db) max2839 toc31 -6 -5 -4 -3 -2 -1 0 1 2 0.1 1 10 100 channel bw = 1.5mhz channel bw = 5mhz channel bw = 10mhz channel bw = 28mhz histogram: iq gain imbalance max2839 toc32 1 /div 316 395 79 237 158 474 mean = 0 dev = 51.8mv sample size = 7839 histogram: rx phase imbalance max2839 toc33 1 /div 516 645 129 387 258 774 mean = 0 dev = 0.11878 sample size = 7841 histogram: rx static dc offset max2839 toc34 1 /div 664 830 166 498 332 996 mean = 0 dev = 0.23981mv sample size = 7841 power-on dc offset cancellation with input signal max2839 toc35 1 s/div 5v/div 0v 200mv/div vga code = -36 lna gain = max i/q output enable power-on dc offset cancellation without input signal max2839 toc36 1 s/div 5v/div 0v 10mv/div vga code = -36 lna gain = max i/q output enable typical operating characteristics (continued) (v cc = 2.8v, t a = +25?, f lo = 2.5ghz, f ref = 40mhz, cs = high, rxhp = sclk = din = low, rf bw = 10mhz, tx output at 50 unbalanced output of balun, using the max2839 evalutation kit.)
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver ______________________________________________________________________________________ 15 tx supply current vs. supply voltage supply voltage (v) supply current (ma) max2839 toc37 2.7 3.0 3.3 3.6 130 134 138 142 146 150 t a = -40 c t a = +25 c t a = +85 c tx baseband frequency response frequency (mhz) response (db) max2839 toc38 -70 -60 -50 -40 -30 -20 -10 0 10 0.1 1 10 100 channel bw = 1.5mhz channel bw = 5mhz channel bw = 10mhz channel bw = 28mhz tx baseband frequency response frequency (mhz) response (db) max2839 toc39 -6 -5 -4 -3 -2 -1 0 1 2 0.1 1 10 100 channel bw = 1.5mhz channel bw = 5mhz channel bw = 10mhz channel bw = 28mhz tx output power vs. frequency frequency (mhz) p out (dbm) max2839 toc40 2300 2350 2400 2450 2500 2550 2600 2650 2700 -4 -3 -2 -1 0 1 2 3 4 t a = -40 c t a = +25 c t a = +85 c tx gain set to max - 3db tx output power vs. gain setting tx gain code p out (dbm) max2839 toc41 0 16324864 -70 -50 -30 -10 10 t a = -40 c t a = +25 c t a = +85 c 0dbr 10db/div -70dbr 2.495ghz 2.5ghz 2.555ghz tx output spectrum (10mhz channel bandwidth, 16 qam fusc) max2839 toc42 p out = 0dbm mask 0dbr 10db/div -70dbr 2.495ghz 2.5ghz 2.555ghz tx output spectrum (10mhz channel bandwidth, 64 qam fusc) max2839 toc43 p out = 0dbm mask tx carrier leakage vs. frequency frequency (mhz) carrier leakage (dbc) max2839 toc44 2300 2350 2400 2450 2500 2550 2600 2650 2700 -60 -55 -50 -45 -40 -35 -30 tx gain set to max - 3db t a = -40 c t a = +25 c t a = +85 c tx carrier leakage vs. gain setting tx gain code carrier leakage (dbc) max2839 toc45 0 9 18 27 36 45 54 63 -70 -65 -60 -55 -50 -45 -40 -35 -30 -25 -20 t a = -40 c t a = +25 c t a = +85 c typical operating characteristics (continued) (v cc = 2.8v, t a = +25?, f lo = 2.5ghz, f ref = 40mhz, cs = high, rxhp = sclk = din = low, rf bw = 10mhz, tx output at 50 unbalanced output of balun, using the max2839 evalutation kit.)
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver 16 ______________________________________________________________________________________ tx sideband level vs. frequency frequency (mhz) sideband level (dbc) max2839 toc46 2300 2350 2400 2450 2500 2550 2600 2650 2700 -80 -75 -70 -65 -60 -55 -50 -45 -40 -35 -30 tx gain set to max - 3db t a = -40 c t a = +25 c t a = +85 c tx sideband level vs. gain setting tx gain code sideband level (dbc) max2839 toc47 0 9 18 27 36 45 54 63 -80 -70 -60 -50 -40 -30 t a = -40 c t a = +25 c t a = +85 c evm vs. tx output power (64 qam fusc, 10mhz channel bandwidth) p out (dbm) evm (%) max2839 toc48 -50 -40 -30 -20 -10 0 0 0.5 1.0 1.5 2.0 2.5 3.0 -80 0 -10 -20 -30 -40 -50 (dbm) -60 -70 -90 -100 0hz 26.5ghz tx output emission spectrum max2839 toc49 rbw = 200khz histogram: tx lo leakage max2839 toc50 1 /div 248 310 62 186 124 372 mean = -46.235dbc dev = 5.1577db sample size = 7841 histogram: tx sideband suppression max2839 toc51 1 /div 336 420 84 252 168 504 mean = -47.856dbc dev = 2.8827db sample size = 7841 25db 5db/div -25db 2ghz 3ghz frequency tx output return loss vs. frequency max2839 toc52 lo frequency vs. differential tune voltage differential tune voltage (v) lo frequency (ghz) max2839 toc53 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 2.5 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 -130 -50 -60 -70 -80 -90 -100 phase noise (dbc/hz) -110 -120 -140 -150 0.0001 0.001 0.01 offset frequency (mhz) 0.1 1 10 phase noise vs. offset frequency max2839 toc54 typical operating characteristics (continued) (v cc = 2.8v, t a = +25?, f lo = 2.5ghz, f ref = 40mhz, cs = high, rxhp = sclk = din = low, rf bw = 10mhz, tx output at 50 unbalanced output of balun, using the max2839 evalutation kit.)
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver ______________________________________________________________________________________ 17 vco gain vs. differential tune voltage differential tune voltage (v) vco gain (mhz/v) max2839 toc55 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 2.5 0 20 40 60 80 100khz 20khz/div -100khz 0 time (ms) 1.498 channel-switching frequency settling (2.3ghz to 2.7ghz, automatic vco sub-band selection) max2839 toc56 100khz 20khz/div -100khz 0 time (ms) 1.498 channel-switching frequency settling (2.7ghz to 2.3ghz, automatic vco sub-band selection) max2839 toc57 100khz 20khz/div -100khz 0 time ( s) 199.89 channel-switching frequency settling (2.3ghz to 2.7ghz, manual vco sub-band selection) max2839 toc58 100khz 20khz/div -100khz 0 time ( channel-switching frequency settling (2.7ghz to 2.3ghz, manual vco sub-band selection) max2839 toc59 10khz/div 2v/div 1 s/div tx-to-rx turnaround frequency glitch settling max2839 toc60 tx to rx switching frequency error frequency error rx-to-tx turnaround frequency glitching settling max2839 toc61 1 s/div 2v/div 10khz/div rx to tx switching typical operating characteristics (continued) (v cc = 2.8v, t a = +25?, f lo = 2.5ghz, f ref = 40mhz, cs = high, rxhp = sclk = din = low, rf bw = 10mhz, tx output at 50 unbalanced output of balun, using the max2839 evalutation kit.)
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver 18 ______________________________________________________________________________________ pin description pin name function 1 gndrxlna_a receiver a lna ground 2 vccrxlna_a receiver a lna supply voltage. bypass with a 22pf capacitor as close as possible to the pin. 3 b0 receiver gain-control logic input bit 0 4 load receiver gain select. positive edge trigger latches digital gain inputs b0?7 to receive a. negative edge trigger latches digital gain inputs b0?7 to receive b. 5 vccrxlna_b receiver b lna supply voltage. bypass with a 22pf capacitor as close as possible to the pin. 6 gndrxlna_b receiver b lna ground 7 rxinb+ 8 rxinb- receiver b lna differential input. input is internally dc-coupled. 9 b4 receiver and transmitter gain-control logic input bit 4 10 b3 receiver and transmitter gain-control logic input bit 3 11 vcctxpad supply voltage for transmitter pa driver. bypass with a 22pf capacitor as close as possible to the pin. 12 b2 receiver and transmitter gain-control logic input bit 2 13 txout+ 14 txout- power amplifier driver differential output. the pins have internal ac blocking capacitors. 15 b1 receiver and transmitter gain-control logic input bit 1 16 b5 receiver and transmitter gain-control logic input bit 5 17 pabias transmit external pa bias dac output 18 vcctxmx transmitter upconverter supply voltage. bypass with a 22pf capacitor as close as possible to the pin. 19 sclk serial-clock logic input of 4-wire serial interface 20 enable transceiver enable 21 clkout reference clock buffer output 22 refclk crystal or reference clock input. ac-couple a crystal or a reference clock to this analog input. 23 xtal1 xtal input. connect the other terminal of the xtal to this pin. 24 vccxtal crystal oscillator supply voltage. bypass with a 100nf capacitor as close as possible to the pin. 25 vcccp pll charge-pump supply voltage. bypass with a 100nf capacitor as close as possible to the pin. 26 gndcp charge-pump circuit ground 27 cpout+ 28 cpout- differential charge-pump output. connect the frequency synthesizer? loop filter between these pins (see the typical operating circuit ). 29 gndvco vco ground 30 vcobyp on-chip vco regulator output bypass. bypass with a 1? capacitor to gnd. do not connect other circuitry to this pin. 31 vccvco vco supply voltage. bypass with a 22nf capacitor as close as possible to the pin. 32 cs chip-select logic input of 4-wire serial interface 33 dout data logic output of 4-wire serial interface 34 din data logic input of 4-wire serial interface 35 rxbbib- 36 rxbbib+ receiver b baseband i-channel differential outputs 37 rxbbqb- 38 rxbbqb+ receiver b baseband q-channel differential outputs
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver ______________________________________________________________________________________ 19 pin description (continued) pin name function 39 rssi receiver signal strength output 40 b7 receiver gain-control logic input bit 7 41 b6 receiver and transmitter gain-control logic input bit 6 42 rxhp receiver baseband ac-coupling highpass corner frequency control logic input. for typical wimax application, connect pin to ground. 43 rxbbqa- 44 rxbbqa+ receiver baseband q-channel differential outputs 45 rxbbia- 46 rxbbia+ receiver a baseband i-channel differential outputs 47 vccrxvga receiver vga supply voltage. bypass with a 100nf capacitor as close as possible to the pin. 48 vccrxfl recei ver baseb and fi l ter s up p l y v ol tag e. byp ass w i th a 100nf cap aci tor as cl ose as p ossi b l e to the p i n. 49 txbbi- 50 txbbi+ transmitter baseband i-channel differential inputs 51 txbbq+ 52 txbbq- transmitter baseband q-channel differential inputs 53 vccrxmx receiver downconverters supply voltage. bypass with a 22pf capacitor as close as possible to the pin. 54 rxtx receive/transmit mode enable 55 rxina- 56 rxina+ receiver a lna differential input. input is internally dc-coupled. ?p exposed paddle. internally connected to gnd. connect to a large ground plane for optimum rf performance and enhanced thermal dissipation. not intended as an electrical connection point.
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver 20 ______________________________________________________________________________________ detailed description modes of operation the modes of operation for the max2839 are shutdown, clock-out only, standby, receive, transmit, transmitter calibration and receiver calibration. see table 1 for a summary of the modes of operation. when the parts are active, various blocks can be shutdown individually by programming different spi registers. shutdown mode the max2839 features a low-power shutdown mode. in shutdown mode, all circuit blocks are powered down, except the 4-wire serial bus and its internal programma- ble registers. clock-out only in clock-out mode, the entire transceiver is off except the divided reference clock output on the clkout pin and the clock divider, which remains on. standby mode the standby mode is used to enable the frequency synthesizer block while the rest of the device is pow- ered down. in this mode, pll, vco, and lo generator are on so that tx or rx modes can be quickly enabled from this mode. these and other blocks can be selec- tively enabled in this mode by programming different spi registers. receive (rx) mode in receive mode, all rx circuit blocks are powered on and active. antenna signal is applied; rf is downcon- verted, filtered, and buffered at rx bb i and q outputs. either receiver a or both receivers can be enabled. receiver b cannot be enabled by itself. transmit (tx) mode in transmit mode, all tx circuit blocks are powered on. the external pa is powered on after a programmable delay using the on-chip pa bias dac. transmitter (tx) calibration mode all tx circuit blocks except pa driver and external pa are powered on and active. the am detector and receiver i/q channel buffers are also on, along with multiplexers in receiver side to route this am detector? signal to each i and q differential outputs. mode control logic inputs circuit block states mode enable pin rxtx pin spi reg1 d<3> spi reg16 d<1:0> rx path tx path pll, vco, lo gen calibration sections on clock output shutdown 0 0 x xx off off off none off clock-out only 1 x x x0 off off off none on clock-out only x 1 x x0 off off off none on standby 0 1 x 01 off off on or off none on rx (1x2 mimo) 1 1 1 01 on off on none on rx (1x1 siso) 1 1 0 01 on (rxa) off on none on tx 1 0 x 01 off on on none on tx calibration 1 0 x 11 off on (except pa driver) on am detector + rx i, q buffers on rxa calibration (loopback) 1 1 0 11 on (except lna) on (except pa driver) on loopback on rxb calibration (loopback) 1 1 1 11 on (except lna) on (except pa driver) on loopback on table 1. operating mode
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver ______________________________________________________________________________________ 21 receiver (rx) calibration or loopback part of rx and tx circuit blocks except lna and pa dri- ver are powered on and active. the transmitter i/q input signals are upconverted to rf, and the output of the tx gain control block (vga) is fed to the receiver at the input of the downconverter. either receiver a or both receivers can be connected to the transmitter and powered on. the i/q lowpass filters are not present in the transmitter signal path (they are bypassed). programmable registers and 4-wire spi interface the max2839 includes 32 programmable 16-bit regis- ters. the most significant bit (msb) is the read/write selection bit. the next 5 bits are register address. the 10 least significant bits (lsbs) are register data. register data is loaded through the 4-wire spi/microwire-compatible serial interface. data at din is shifted in msb first and is framed by cs . when cs is low, the clock is active, and input data is shifted at the rising edge of the clock. during the read mode, register data selected by address bits is shifted out to dout at the falling edges of the clock. at the cs rising edge, the 10-bit data bits are latched into the register selected by address bits. see figure 1. the register values are preserved in shutdown mode as long as the power-supply voltage is maintained. however, every time the power-supply voltage is turned on, the regis- ters are reset to the default values. din sclk bit 6 bit 2 bit 1 t ds t dh bit 14 bit 13 bit 5 t ch t cl t csh t cso t css t csw t cs1 dout don't care spi register write din sclk bit 2 bit 1 t d bit 5 cs dout don't care spi register read bit 6 bit 14 bit 13 don't care cs figure 1. 4-wire spi serial-interface timing diagram microwire is a trademark of national semiconductor corp.
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver 22 ______________________________________________________________________________________ 56 55 54 53 52 51 50 49 48 47 46 45 44 43 15 16 17 18 19 20 21 22 23 24 25 26 27 28 42 41 40 39 38 37 36 35 34 33 32 31 30 29 1 2 3 4 5 6 7 8 9 10 11 12 13 14 rx basband hpf control rx/tx gain control rx gain control serial input serial output serial input pll filter tx output rx b input tx inputs rx a input rx a outputs imux qmux crystal oscillator/ buffer pll serial interface sclk temp sensor imux qmux rssi mux rssi 90 0 am detector imux/qmux + rxhp b6 b7 rssi rxbbqb- rxbbqb+ rxbbib+ rxbbib- din dout cs vccvco vcobyp gndvco gndcp cpout+ cpout- xtal1 vccxtal vcccp refclk clkout enable sclk vcctxmx pabias b5 b1 gndrxlna_a vccrxlna_a b0 load vccrxlna_b gndrxlna_b rxinb+ rxinb- b4 b3 vcctxpad b2 txout+ txout- rxbbia- vccrxfl vccrxvga rxbbia+ rxbbqa- rxbbqa+ txbbi- txbbi+ txbbq+ txbbq- vccrxmx rxtx rxina- rxina+ mode control rx gain control rx gain select rx/tx gain control rx/tx gain control rx/tx gain control rx/tx gain control serial input mode control reference clock output rx b outputs max2839 serial interface block diagram/typical operating circuit
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver ______________________________________________________________________________________ 23 chip information process: bicmos 56 55 54 53 52 51 50 49 48 47 46 45 44 43 15 16 17 18 19 20 21 22 23 24 25 26 27 28 42 41 40 39 38 37 36 35 34 33 32 31 30 29 1 2 3 4 5 tqfn + 6 7 8 9 10 11 12 13 14 max2839 gndcp cpout+ cpout- xtal1 vccxtal vcccp refclk clkout enable sclk vcctxmx pabias b5 b1 rxhp b6 b7 rssi rxbbqb- rxbbqb+ rxbbib+ rxbbib- din dout cs vccvco vcobyp gndvco rxbbia- vccrxfl vccrxvga rxbbia+ rxbbqa- rxbbqa+ txbbi- txbbi+ txbbq+ txbbq- vccrxmx rxtx rxina- rxina+ gndrxlna_a vccrxlna_a b0 load vccrxlna_b gndrxlna_b rxinb+ rxinb- b4 b3 vcctxpad b2 txout+ txout- *ep *ep = exposed pad. pin configuration
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver 24 ______________________________________________________________________________________ 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 package outline 21-0135 2 1 f 56l thin qfn, 8x8x0.8mm
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver ______________________________________________________________________________________ 25 package information (continued) (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 .) package outline 21-0135 2 2 f 56l thin qfn, 8x8x0.8mm
max2839 2.3ghz to 2.7ghz mimo wireless broadband rf transceiver 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. 26 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2007 maxim integrated products is a registered trademark of maxim integrated products, inc. revision history revision number revision date description pages changed 0 2/08 initial release 1 3/08 corrected ordering information and pin 42 in pin description 1, 19

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