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general description the MAX2267/max2268/max2269 power amplifiers are optimized for is-98-based cdma and pdc cellular tele- phones operating in the japanese cellular-frequency band. when matched for cdma operation, the ampli- fiers achieve 27dbm output power with 35% efficiency (max2268), with margin over the adjacent and alternate channel specification. at a + 17dbm output? very common power level for cdma phones?he max2268 still has 7% efficiency, yielding excellent overall talk time. at the same power level, the MAX2267/max2269 have an unprecedented 12%/17% efficiency, while still obtaining 28%/29% efficiency at maximum output power. the MAX2267/max2268/max2269 have internally refer- enced bias ports that are normally terminated with sim- ple resistors. the bias ports allow customization of acpr margin and gain. they can also be used to ?hrottle back?bias current when generating low power levels. the MAX2267/max2268/max2269 have excel- lent gain stability over temperature (?.8db), so over- design of driver stages and excess driver current are dramatically reduced, further increasing the phone? talk time. the devices can be operated from +2.7v to +4.5v while meeting all acpr specifications over the entire temperature range. the devices are packaged in a 16-pin tssop with exposed paddle (ep). for module or direct chip attach applications, the MAX2267 is also available in die form. applications cellular-band cdma phones cellular-band pdc phones 2-way pagers power-amplifier modules features low average cdma current consumption in typical urban scenario 55ma (MAX2267) 90ma (max2268) 50ma (max2269) 0.5? shutdown mode eliminates external supply switch ?.8db gain variation over temperature no external reference or logic interface circuitry needed supply current and acpr margin dynamically adjustable +2.7v to +4.5v single-supply operation 35% efficiency at +2.7v operation MAX2267/max2268/max2269 +2.7v, single-supply, cellular-band linear power amplifiers ________________________________________________________________ maxim integrated products 1 top view MAX2267/max2269 in1 in0 bias2h v cc gnd nfp out0 bias1l out1 pwr v cc shdn bias1h v cc bias2l out1 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 bias tssop-ep 19-1567; rev 1; 2/01 pin configurations/ functional diagrams ordering information selector guide * contact factory for dice specifications. pin configurations continued at end of data sheet. 16 tssop-ep dice* 16 tssop-ep pin- package temp. range -40? to +85? -40? to +85? -40? to +85? max2268 eue MAX2267e/d MAX2267 eue part 16 tssop-ep -40? to +85? max2269 eue tssop-ep 5mm x 6.4mm max2269 29 17 device MAX2267 max2268 34 28 12 7 41 pdc at +29dbm cdma at +17dbm cdma at +27dbm high power-added efficiency (%) for price, delivery, and to place orders, please contact maxim distribution at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. evaluation kit available
MAX2267/max2268/max2269 +2.7v, single-supply, cellular-band linear power amplifiers 2 _______________________________________________________________________________________ absolute maximum ratings dc electrical characteristics (v cc = +2.7v to +4.5v no input signal applied, v shdn = 2.0v, t a = t min to t max , unless otherwise noted. typical values are at v cc = +3.5v and t a = +25?.) (note 8) 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. v cc to gnd (no rf input) ........................................-0.3v to +5v logic inputs to gnd...................................-0.3v to (v cc + 0.3v) bias_ _ to gnd ..........................................-0.3v to (v cc + 0.3v) rf input power ...................................................+6dbm (20mw) logic input current...........................................................?0ma output vswr with +6dbm input ..........................................2.5:1 total dc power dissipation (t paddle = +100?) 16-pin tssop-ep (derate 60mw/? above t paddle = +100?)..............................................4w ja .................................................................................8?/w operating temperature range ...........................-40? to +85? junction temperature ......................................................+150? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? ac electrical characteristics?ax2267 (MAX2267 ev kit, v cc = v pwr = v shdn = +3.5v, f in = 906mhz, cdma modulation, shdn = v cc , matching networks tuned for 887mhz to 925mhz operation, 50 ? system, t a = +25?, unless otherwise noted.) MAX2267/max2269 max2268 shdn = pwr = gnd logic = v cc logic = gnd conditions 34 100 i cc v 2.7 4.5 v cc operating voltage range idle current v 0.8 logic threshold low v 2.0 logic threshold high 90 ? 0.5 10 i cc shutdown supply current ? -1 5 logic input current high ? -1 1 logic input current low units min typ max symbol parameter pwr = v cc pwr = gnd 14 15.5 pwr = gnd, v cc = 2.8v pwr = gnd pwr = v cc = 2.8v pwr = v cc db 24.5 26 g p power gain (note 1) pwr = v cc or gnd acpr specification met with f in = 887mhz to 925mhz acpr specification met with f in = 887mhz to 925mhz conditions mhz 887 925 f in frequency range (notes 1, 2) dbm 27 p out output power (high-power mode) (note 1) 24.5 25.5 dbm 16 17.5 p out output power (low-power mode) (note 1) units min typ max symbol parameter ma t a = +25? t a = t min to t max , relative to t a = +25? db ?.8 gain variation vs. temperature (note 1) 20.5 23 23 pwr = gnd t a = t min to t max
MAX2267/max2268/max2269 +2.7v, single-supply, cellular-band linear power amplifiers _______________________________________________________________________________________ 3 ac electrical characteristics?ax2268 (max2268 ev kit, v cc = v shdn = +3.5v, f in = 906mhz, cdma modulation, matching networks tuned for 887mhz to 925mhz opera- tion, 50 ? system, t a = +25?, unless otherwise noted.) parameter symbol min typ max units adjacent-channel power ratio limit (notes 1, 2) acpr -44 -48 dbc alternate-channel power ratio limit (notes 1, 2) acpr -56 -57.5 dbc power-mode switching time 550 ns turn-on time (notes 1, 4) 15 ? maximum input vswr vswr 2.3:1 nonharmonic spurious due to load mismatch (notes 1, 5) -60 dbc noise power (note 6) -137 -134 harmonic suppression 32 dbc conditions (note 4) v cc = 2.8v to 4.5v, offset = 885khz, 30khz bw, f in = 887mhz to 925mhz v cc = 2.8v to 4.5v, offset = 1980khz, 30khz bw, f in = 887mhz to 925mhz pwr = v cc or gnd f in = 887mhz to 925mhz, pwr = gnd or v cc p in = +6dbm measured at 851mhz pwr = gnd, measured at 851mhz (note 7) dbm/hz parameter symbol min typ max units 24.5 25.5 output power (note 1) p out 27 dbm gain variation vs. temperature (note 1) ?.7 db adjacent-channel power ratio (notes 1, 2) acpr -44 -48 dbc alternate-channel power ratio (notes 1, 2) acpr -56 -57.5 dbc frequency range (notes 1, 2) f in 887 925 mhz 24 conditions acpr specification met with f in = 887mhz to 925mhz t a = t min to t max , relative to t a = +25? v cc = 2.8v to 4.5v, offset = 885khz, 30khz bw, f in = 887mhz to 925mhz v cc = 2.8v to 4.5v, offset = 1980khz, 30khz bw, f in = 887mhz to 925mhz t a = t min to t max power gain (note 1) g p 25.5 27 db t a = +25? ac electrical characteristics?ax2267 (continued) (MAX2267 ev kit, v cc = v pwr = v shdn = +3.5v, f in = 906mhz, cdma modulation, shdn = v cc , matching networks tuned for 887mhz to 925mhz operation, 50 ? system, t a = +25?, unless otherwise noted.) 28 pwr = v cc , p out = +27dbm power-added efficiency (note 3) pae 12 % pwr = gnd, p out = 17.5dbm v cc = 3.5v v cc = 2.8v power-added efficiency (note 3) pae 35 % p in adjusted to give p out = 27dbm turn-on time (notes 1, 4) 15 ? maximum input vswr vswr 1.5:1 f in = 887mhz to 925mhz p in adjusted for p out = 13.6dbm 5.5
MAX2267/max2268/max2269 +2.7v, single-supply, cellular-band linear power amplifiers 4 _______________________________________________________________________________________ ac electrical characteristics?ax2268 (continued) (max2268 ev kit, v cc = v shdn = +3.5v, f in = 906mhz, cdma modulation, matching networks tuned for 887mhz to 925mhz opera- tion, 50 ? system, t a = +25?, unless otherwise noted.) parameter symbol min typ max units nonharmonic spurious due to load mismatch (notes 1, 5) -60 dbc noise power (note 6) -138 dbm/hz harmonic suppression 47 dbc conditions p in = +6dbm measured at 851mhz (note 7) ac electrical characteristics?ax2269 (max2269 ev kit, v cc = v pwr = v shdn = +3.5v, f in = 906mhz, cdma modulation, shdn = v cc , matching networks tuned for 887mhz to 925mhz operation, 50 ? system, t a = +25?, unless otherwise noted.) 17 pwr = gnd, p out = 17dbm pwr = v cc , p out = +27dbm % 29 pae power-added efficiency (note 3) v cc = 2.8v to 4.5v, offset = 1980khz, 30khz bw, f in = 887mhz to 925mhz dbc -56 -57.5 acpr alternate-channel power ratio limit (notes 1, 2) v cc = 2.8v to 4.5v, offset = 885khz, 30khz bw, f in = 887mhz to 925mhz dbc -44 -48 acpr adjacent-channel power ratio limit (notes 1, 2) pwr = gnd, v cc = 2.8v 13.5 15 pwr = gnd pwr = v cc = 2.8v pwr = v cc db 24.5 26 g p power gain (note 1) pwr = v cc pwr = v cc or gnd acpr specification met with f in = 887mhz to 925mhz acpr specification met with f in = 887mhz to 925mhz conditions mhz 887 925 f in frequency range (notes 1, 2) dbm 27 p out output power (high-power mode) (note 1) 24.5 25.5 dbm 15.5 17 p out output power (low-power mode) (note 1) units min typ max symbol parameter t a = +25? t a = t min to t max , relative to t a = +25? db ?.8 gain variation vs. temperature (note 1) pwr = gnd t a = t min to t max 23.5 26 23
MAX2267/max2268/max2269 +2.7v, single-supply, cellular-band linear power amplifiers _______________________________________________________________________________________ 5 note 1: minimum and maximum values are guaranteed by design and characterization, not production tested. note 2: p max is met over this frequency range at the acpr limit with a single matching network. for optimum performance at other frequencies, the output matching network must be properly designed. see the applications information section. operation between 750mhz and 1000mhz is possible but has not been characterized. note 3: pae is specified into a 50 ? load, while meeting the acpr requirement. note 4: time from logic transition until p out is within 1db of its final mean power. note 5: murata isolator as load with 20:1 vswr any phase angle after isolator. note 6: noise power can be improved by using the circuit in figures 1 and 2. note 7: harmonics measured on the evaluation kit, which provides some harmonic attenuation in addition to the rejection provided by the ic. the combined suppression is specified. note 8: +25? guaranteed by production test, +25? guaranteed through correlation to worst-case temperature testing. ac electrical characteristics?ax2269 (continued) (max2269 ev kit, v cc = v pwr = v shdn = +3.5v, f in = 906mhz, cdma modulation, shdn = v cc , matching networks tuned for 887mhz to 925mhz operation, 50 ? system, t a = +25?, unless otherwise noted.) parameter symbol min typ max units power-mode switching time 550 ns turn-on time (notes 1, 4) 15 ? maximum input vswr vswr 2.4:1 nonharmonic spurious due to load mismatch (notes 1, 5) -60 dbc noise power (note 6) -137 -130 harmonic suppression 32 dbc conditions (note 4) pwr = v cc or gnd f in = 887mhz to 925mhz, pwr = gnd or v cc p in = +6dbm measured at 851mhz pwr = gnd, measured at 851mhz (note 7) dbm/hz 0 20 40 60 80 100 120 140 2.5 3.5 3.0 4.0 4.5 5.0 5.5 MAX2267 shutdown current vs. supply voltage MAX2267/9-01 supply voltage (v) supply current (na) t a = +85? t a = -40? t a = +25? pwr = gnd shdn = gnd no input drive 20 22 26 24 28 30 2.5 3.5 3.0 4.0 4.5 5.0 MAX2267 gain vs. supply voltage MAX2267/9-02 supply voltage (v) gain (db) pwr = v cc t a = -40 c t a = +85 c t a = +25 c 18 20 24 22 26 28 2.5 4.0 3.0 3.5 4.5 5.0 MAX2267 gain vs. supply voltage MAX2267/9-03 supply voltage (v) gain (db) pwr = gnd t a = -40 c t a = +85 c t a = +25 c typical operating characteristics (MAX2267/max2268/max2269 ev kits, v cc = +3.5v, shdn = v cc , cdma modulation, t a = +25?, unless otherwise noted.)
MAX2267/max2268/max2269 +2.7v, single-supply, cellular-band linear power amplifiers 6 _______________________________________________________________________________________ pwr = v cc t a = +25 c t a = -40 c t a = +85 c 24 26 30 28 32 34 2.5 3.5 3.0 4.0 4.5 5.0 MAX2267 power-added efficiency vs. supply voltage MAX2267/9-04 supply voltage (v) pae (%) 8 9 11 10 13 12 14 2.5 4.0 3.0 3.5 4.5 5.0 MAX2267 power-added efficiency vs. supply voltage MAX2267/9-05 supply voltage (v) pae (%) t a = -40 c t a = +85 c t a = +25 c pwr = gnd 25 28 27 26 29 30 31 32 04 2 68 MAX2267 output power vs. input power MAX2267/9-06 input power (dbm) output power (dbm) pwr = v cc t a = -40 c t a = +25 c t a = +85 c typical operating characteristics (continued) (MAX2267/max2268/max2269 ev kits, v cc = +3.5v, shdn = v cc , cdma modulation, t a = +25?, unless otherwise noted.) 8 12 16 20 24 -14 -8 -12 -10 -6 -4 -2 MAX2267 output power vs. input power MAX2267/9-07 input power (dbm) output power (dbm) t a = +25 c t a = +85 c t a = -40 c pwr = gnd 23 25 24 26 27 28 015 5 10 20 25 30 35 MAX2267 gain vs. output power MAX2267/9-08 output power (dbm) gain (db) pwr = v cc t a = +25 c t a = +85 c t a = -40 c 21 22 24 23 25 26 -10 5 -5 0 10 15 20 MAX2267 gain vs. output power MAX2267/9-09 output power (dbm) gain (db) pwr = gnd t a = -40 c t a = +85 c t a = +25 c 0 200 400 600 800 015 5 10 20 25 30 35 MAX2267 supply current vs. output power MAX2267/9-10 output power (dbm) supply current (ma) pwr = v cc pwr = gnd 0 40 80 120 160 09 3 6 12 15 18 MAX2267 supply current vs. output power MAX2267/9-11 output power (dbm) supply current (ma) t a = +85 c t a = -40 c t a = +25 c -80 -70 -50 -60 -40 -30 515 10 20 25 30 MAX2267 adjacent-channel power ratio vs. output power MAX2267/9-12 output power (dbm) acpr (dbc) pwr = v cc t a = +25 c t a = +85 c t a = -40 c
MAX2267/max2268/max2269 +2.7v, single-supply, cellular-band linear power amplifiers _______________________________________________________________________________________ 7 pwr = gnd -80 -70 -50 -60 -40 -30 -10 5 -5 0 10 15 20 MAX2267 adjacent-channel power ratio vs. output power MAX2267/9-13 output power (dbm) acpr (dbc) t a = -40 c t a = +85 c t a = +25 c -90 -70 -80 -60 -50 -40 515 10 20 25 30 MAX2267 alternate-channel power ratio vs. output power MAX2267/9-14 output power (dbm) acpr (dbc) pwr = v cc t a = +85 c t a = -40 c t a = +25 c -80 -70 -50 -60 -40 -30 880 900 890 910 920 930 MAX2267 adjacent-channel power ratio vs. frequency MAX2267/9-16 frequency (mhz) acpr (dbc) pwr = v cc p out = +27dbm t a = +25 c t a = -40 c t a = +85 c -90 -80 -60 -70 -50 -40 880 900 890 910 920 930 MAX2267 alternate-channel power ratio vs. frequency MAX2267/9-17 frequency (mhz) acpr (dbc) pwr = v cc p out = +27dbm t a = +25 c t a = -40 c t a = +85 c typical operating characteristics (continued) (MAX2267/max2268/max2269 ev kits, v cc = +3.5v, shdn = v cc , cdma modulation, t a = +25?, unless otherwise noted.) pwr = v cc 0 25 15 5 30 35 40 10 20 45 50 55 020 25 51015 30 35 MAX2267 power-added efficiency vs. output power output power (dbm) pae (%) MAX2267/9-18 v cc = 3.5v v cc = 2.7v 0 5 10 15 20 -10 5 -5 0 10 15 20 MAX2267 power-added efficiency vs. output power MAX2267/9-19 output power (dbm) pae (%) pwr = gnd t a = +25 c t a = -40 c t a = +85 c 24 26 30 28 32 34 890 880 910 900 920 930 MAX2267 power-added efficiency vs. frequency MAX2267/9-20 frequency (mhz) pae (%) pwr = v cc p out = +27dbm t a = +25 c t a = +85 c t a = -40 c pwr = gnd p out = +17dbm 5 15 10 20 890 880 910 900 920 930 MAX2267 power-added efficiency vs. frequency MAX2267/9-21 frequency (mhz) pae (%) t a = -40 c t a = +25 c t a = +85 c pwr = gnd -5 5 0101520 MAX2267 alternate-channel power ratio vs. output power MAX2267/9-15 output power (dbm) -90 -70 -80 -60 -50 -40 acpr (dbc) t a = +85 c t a = +25 c t a = -40 c
MAX2267/max2268/max2269 +2.7v, single-supply, cellular-band linear power amplifiers 8 _______________________________________________________________________________________ -80 -70 -50 -60 -40 -30 515 10 20 25 30 max2268 adjacent-channel power ratio vs. output power MAX2267/9-28 output power (dbm) acpr (dbc) t a = +25 c t a = +85 c t a = -40 c -90 -80 -60 -70 -50 -40 515 10 20 25 30 max2268 alternate-channel power ratio vs. output power MAX2267/9-29 output power (dbm) acpr (dbc) t a = +85 c t a = +25 c t a = -40 c -80 -70 -50 -60 -40 -30 880 900 890 910 920 930 max2268 adjacent-channel power ratio vs. frequency MAX2267/9-30 frequency (mhz) acpr (dbc) t a = +25 c t a = -40 c t a = +85 c 0 20 40 60 80 100 120 140 2.5 3.5 3.0 4.0 4.5 5.0 5.5 max2268 shutdown current vs. supply voltage MAX2267/9-22 supply voltage (v) supply current (na) t a = +85 c t a = -40 c t a = +25 c 20 22 26 24 28 30 2.5 3.5 3.0 4.0 4.5 5.0 max2268 gain vs. supply voltage MAX2267/9-23 supply voltage (v) gain (db) t a = -40 c t a = +85 c t a = +25 c 30 32 36 34 38 40 2.5 3.5 3.0 4.0 4.5 5.0 max2268 power-added efficiency vs. supply voltage MAX2267/9-24 supply voltage (v) pae (%) t a = +85 c t a = -40 c t a = +25 c 25 28 27 26 29 30 31 32 04 2 68 max2268 output power vs. input power MAX2267/9-25 input power (dbm) output power (dbm) t a = -40 c t a = +85 c t a = +25 c v cc = 3.5v typical operating characteristics (continued) (MAX2267/max2268/max2269 ev kits, v cc = +3.5v, shdn = v cc , cdma modulation, t a = +25?, unless otherwise noted.) 23 25 24 26 27 28 015 5 10 20 25 30 35 max2268 gain vs. output power MAX2267/9-26 output power (dbm) gain (db) t a = +85 c t a = +25 c t a = -40 c v cc = 3.5v 0 200 400 600 800 015 5 10 20 25 30 35 max2268 supply current vs. output power MAX2267/9-27 output power (dbm) supply current (ma) using optional tb circuit in figure 2
MAX2267/max2268/max2269 +2.7v, single-supply, cellular-band linear power amplifiers _______________________________________________________________________________________ 9 -90 -80 -60 -70 -50 -40 880 900 890 910 920 930 max2268 alternate-channel power ratio vs. frequency MAX2267/9-31 frequency (mhz) acpr (dbc) t a = +25 c t a = -40 c t a = +85 c 0 25 15 5 30 35 40 10 20 45 50 55 020 25 51015 30 35 max2268 power-added efficiency vs. output power output power (dbm) pae (%) MAX2267/9-32 v cc = 3.5v v cc = 2.7v 0 20 40 60 80 100 120 140 2.5 3.5 3.0 4.0 4.5 5.0 5.5 max2269 shutdown current vs. supply voltage MAX2267/9-34 supply voltage (v) supply current (na) t a = +85 c t a = -40 c t a = +25 c pwr = gnd shdn = gnd no input drive 20 22 26 24 28 30 2.5 3.5 3.0 4.0 4.5 5.0 max2269 gain vs. supply voltage MAX2267/9-35 supply voltage (v) gain (db) pwr = v cc t a = -40 c t a = +85 c t a = +25 c typical operating characteristics (continued) (MAX2267/max2268/max2269 ev kits, v cc = +3.5v, shdn = v cc , cdma modulation, t a = +25?, unless otherwise noted.) pwr = v cc t a = +25 c t a = -40 c t a = +85 c 24 26 30 28 32 34 2.5 3.5 3.0 4.0 4.5 5.0 max2269 power-added efficiency vs. supply voltage MAX2267/9-37 supply voltage (v) pae (%) 20 22 26 24 28 30 2.5 4.0 3.0 3.5 4.5 5.0 max2269 gain vs. supply voltage MAX2267/9-36 supply voltage (v) gain (db) pwr = gnd t a = -40 c t a = +85 c t a = +25 c t a = -40 c t a = +85 c t a = +25 c 13 14 16 15 18 17 19 2.5 4.0 3.0 3.5 4.5 5.0 max2269 power-added efficiency vs. supply voltage MAX2267/9-38 supply voltage (v) pae (%) pwr = gnd 30 32 36 34 38 40 880 900 890 910 920 930 max2268 power-added efficiency vs. frequency MAX2267/9-33 frequency (mhz) pae (%) t a = -40 c t a = +85 c t a = +25 c
MAX2267/max2268/max2269 +2.7v, single-supply, cellular-band linear power amplifiers 10 ______________________________________________________________________________________ typical operating characteristics (continued) (MAX2267/max2268/max2269 ev kits, v cc = +3.5v, shdn = v cc , cdma modulation, t a = +25?, unless otherwise noted.) 8 12 16 20 24 -14 -8 -12 -10 -6 -4 -2 max2269 output power vs. input power MAX2267/9-40 input power (dbm) output power (dbm) pwr = gnd t a = +85 c t a = -40 c t a = +25 c 23 25 24 26 27 28 015 5 10 20 25 30 35 max2269 gain vs. output power MAX2267/9-41 output power (dbm) gain (db) pwr = v cc t a = -40 c t a = +85 c t a = +25 c 24 25 27 26 28 29 -10 5 -5 0 10 15 20 max2269 gain vs. output power MAX2267/9-42 output power (dbm) gain (db) pwr = gnd t a = -40 c t a = +85 c t a = +25 c pwr = v cc 0 200 400 600 800 015 5 10 20 25 30 35 max2269 supply current vs. output power MAX2267/9-43 output power (dbm) supply current (ma) pwr = gnd 0 40 80 120 160 09 3 6 12 15 18 max2269 supply current vs. output power MAX2267/9-44 output power (dbm) supply current (ma) t a = +25 c t a = +85 c t a = -40 c -80 -70 -50 -60 -40 -30 515 10 20 25 30 max2269 adjacent-channel power ratio vs. output power MAX2267/9-45 output power (dbm) acpr (dbc) pwr = v cc t a = +85 c t a = -40 c t a = +25 c pwr = gnd -80 -70 -50 -60 -40 -30 -10 5 -5 0 10 15 20 max2269 adjacent-channel power ratio vs. output power MAX2267/9-46 output power (dbm) acpr (dbc) t a = +85 c t a = +25 c t a = -40 c -90 -80 -60 -70 -50 -40 515 10 20 25 30 max2269 alternate-channel power ratio vs. output power MAX2267/9-47 output power (dbm) acpr (dbc) pwr = v cc t a = +85 c t a = -40 c t a = +25 c 25 28 27 26 29 30 31 32 04 2 68 max2269 output power vs. input power MAX2267/9-39 input power (dbm) output power (dbm) pwr = v cc t a = -40 c t a = +85 c t a = +25 c
MAX2267/max2268/max2269 +2.7v, single-supply, cellular-band linear power amplifiers ______________________________________________________________________________________ 11 -80 -70 -50 -60 -40 -30 880 900 890 910 920 930 max2269 adjacent-channel power ratio vs. frequency MAX2267/9-49 frequency (mhz) acpr (dbc) pwr = v cc p out = +27dbm t a = +85 c t a = -40 c t a = +25 c -90 -80 -60 -70 -50 -40 880 900 890 910 920 930 max2269 alternate-channel power ratio vs. frequency MAX2267/9-50 frequency (mhz) acpr (dbc) pwr = v cc p out = +27dbm t a = +85 c t a = -40 c t a = +25 c 0 25 15 5 30 35 40 10 20 45 50 55 020 25 51015 30 35 max2269 power-added efficiency vs. output power output power (dbm) pae (%) MAX2267/9-51 pwr = v cc v cc = 3.5v v cc = 2.7v t a = -40 c t a = +85 c t a = +25 c 0 5 10 15 20 -10 5 -5 0 10 15 20 max2269 power-added efficiency vs. output power MAX2267/9-52 output power (dbm) pae (%) pwr = gnd 24 26 30 34 32 28 890 880 910 900 920 930 max2269 power-added efficiency vs. frequency MAX2267/9-53 frequency (mhz) pae (%) pwr = v cc p out = +27dbm t a = +85 c t a = -40 c t a = +25 c 10 20 15 25 890 880 910 900 920 930 max2269 power-added efficiency vs. frequency MAX2267/9-54 frequency (mhz) pae (%) pwr = gnd p out = +17dbm t a = +85 c t a = -40 c t a = +25 c typical operating characteristics (continued) (MAX2267/max2268/max2269 ev kits, v cc = +3.5v, shdn = v cc , cdma modulation, t a = +25?, unless otherwise noted.) pwr = gnd -90 -80 -60 -70 -50 -40 -5 5 0101520 max2269 alternate-channel power ratio vs. output power MAX2267/9-48 output power (dbm) acpr (dbc) t a = -40 c t a = +85 c t a = +25 c
MAX2267/max2268/max2269 +2.7v, single-supply, cellular-band linear power amplifiers 12 ______________________________________________________________________________________ detailed description the MAX2267/max2268/max2269 are linear power amplifiers (pas) intended for cdma and tdma applica- tions. the devices have been fully characterized in the 887mhz to 925mhz japanese cellular band and can be used from 750mhz to 1000mhz by adjusting the input and output match. in cdma applications, they provide +27dbm of output power and up to 35% power-added efficiency (pae) from a single +2.7v to +4.5v supply. an inherent drawback of traditional pas is that their effi- ciency drops rapidly with reduced output power. for example, in a pa designed for maximum efficiency at +27dbm, the efficiency at +15dbm falls well below 4.5% (over 200ma from a 3.5v supply). this behavior significantly reduces talk time in cdma phones because over 90% of the time they are at output pow- ers below +16dbm. the MAX2267/max2268/max2269 are optimized for lowest current draw at output powers that are most likely to occur in real-life situations. this provides up to 50% reduced average pa current. high-power and low-power modes the MAX2267/max2269 are designed to provide opti- mum pae in both high- and low-power modes. for a +3.5v supply, maximum output power is +27dbm in high-power mode. in low-power mode, output power is +17dbm and +17.5dbm, respectively. use the sys- tem? microcontroller to determine required output power, and switch between the two modes as appropri- ate with the pwr logic pin. bias control the bias current of the first stage in low-power mode is proportional to the current flowing out of bias1l. the voltage at bias1l is fixed by an internal bandgap refer- pin description in1 rf input port. requires external matching network. 1 1 in0 rf input port. requires external matching network. 16 bias1l out0 nfp gnd bias2h bias1h shdn bias2l out1 v cc pwr name low-power mode first stage bias control. see general description . 10 rf output port. requires an appropriate output matching network and collector bias. 11 noise filtering pin. connect noise filtering network as described in noise filtering section. if unused, leave open. 12 12 ground. solder the package slug to high-thermal-conductivity circuit board ground plane. 13, slug 13, slug high-power mode second stage bias control. see general description . 15 15 high-power mode first stage bias control. see general description . 4 4 shutdown control input. drive shdn low to enable shutdown. drive high for normal operation. on the max2268, make sure that both pins get driven simulta- neously. to place the MAX2267 into shutdown mode, also pull the pwr pin low. 2, 6 6 low-power mode second stage bias control. see general description . 7 rf output ports. require an appropriate output matching network and collector bias. 8, 9 8, 9 voltage supply. it is critical to bypass these pins with capacitors to gnd as close to the pins as possible. 3, 5 3, 5, 14 mode-select input. drive low to select the low-power mode (bias1l and bias2l). drive high to select high-power mode (bias1h and bias2h). 2 pin max2268 MAX2267 max2269 function n.c. not internally connected. do not make any connections to these pins. 7, 10, 11, 14, 16
MAX2267/max2268/max2269 +2.7v, single-supply, cellular-band linear power amplifiers ______________________________________________________________________________________ 13 ence, so the current out of this pin is inversely propor- tional to the value of the resistor between this pin and ground. similarly, the bias current of the first stage in high-power mode is proportional to the current flowing out of bias1h. the current in the second stage is pro- portional to the currents out of bias2l and bias2h for low- and high-power modes, respectively. additionally, these resistors allow for customization of gain and alternate- and adjacent-channel power ratios. increasing the bias current in the first stage increases the gain and improves alternate-channel power ratio at the expense of efficiency. increasing the bias current in the second stage increases gain at the expense of efficiency as well as adjacent- and alternate-channel power ratios. the pa bias current can be dynamically adjusted by summing a current into the bias pin of interest with an external source such as a dac. see the max2268 typical application circuit for using a voltage dac and current setting resistors rtb1 and rtb2. choosing rtb1 = r1 and rtb2 = r2 allows current adjustment between 0ma to double the nominal idle current with dac voltages between 0v and 2.4v. the dac must be able to source approximately 100?. shutdown mode pull pins 2 and 6 low to place the MAX2267/max2268/ max2269 into shutdown mode. in this mode, all gain stages are disabled and supply current drops to 0.5?. applications information increasing efficiency the max2269 incorporates an additional external switch to increase efficiency to 17% at +17dbm and to 29% at +27dbm. this increase in efficiency is mainly due to the additional isolation between the high- and low-power outputs provided by the external switch. external components the MAX2267/max2268/max2269 require matching circuits at their inputs and outputs for operation in a 50 ? system. the simplified application circuits in figures 1, 2, and 3 describe the topology of the circuit- 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 bias rfin l1 pwr v cc v cc v cc v cc shdn l3 c3 c4 l4 rh1 rl2 c1 c12 c11 l2 c2 rh2 c13 c8 c7 rfout c9 c5 rl1 c6 l6 l5 optional noise-reduction circuit v cc MAX2267 figure 1. MAX2267 typical application circuit
MAX2267/max2268/max2269 +2.7v, single-supply, cellular-band linear power amplifiers 14 ______________________________________________________________________________________ figure 2. max2268 typical application circuit ry for each device. for more detailed circuit diagrams, refer to the MAX2267/max2268/max2269 ev kit manu- al. the ev kit manual suggests component values that are optimized for best simultaneous efficiency and return loss performance. use high-quality components in these matching circuits for greatest efficiency. layout and power-supply bypassing a properly designed pc board is essential to any rf/microwave circuit. be sure to use controlled imped- ance lines on all high-frequency inputs and outputs. proper grounding of the gnd pins is fundamental; if the pc board uses a topside rf ground, connect all gnd pins (especially the tssop package exposed gnd pad) directly to it. on boards where the ground plane is not on the component side, it? best to connect all gnd pins to the ground plane with plated through-holes close to the package. to minimize coupling between different sections of the system, the ideal power-supply layout is a star configu- ration with a large decoupling capacitor at a central v cc node. the v cc traces branch out from this central node, each leading to a separate v cc node on the pc board. a second bypass capacitor with low esr at the rf frequency of operation is located at the end of each trace. this arrangement provides local decoupling at the v cc pin. input and output impedance-matching networks are very sensitive to layout-related parasitics. it is important to keep all matching components as close to the ic as possible to minimize the effects of stray inductance and stray capacitance of pc board traces. 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 bias rfin tx power l1 c1 v cc v cc v cc shdn c3 c4 c6 l6 l4 r1 rtb1 c12 c11 r2 c13 l7 c7 rfout c9 optional noise-reduction circuit max2268 l3 rtb2 optional tb circuit
MAX2267/max2268/max2269 +2.7v, single-supply, cellular-band linear power amplifiers ______________________________________________________________________________________ 15 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 bias rfin l1 c1 v cc v cc v cc v cc shdn c4 l4 rh1 c12 c11 rh2 c6 c13 rl1 optional noise- reduction circuit max2269 l3 c3 c2 l6 l2 c7 c9 c8 rfout 5 2 n.c. 4 6 3 u1 upg152ta l5 c5 v cc pwr rl2 pwr l7 r1 optional figure 3. max2269 typical application circuit noise filtering for improved noise performance, the MAX2267/ max2268/max2269 allow for additional noise filtering for further suppression of transmit noise. use the rec- ommended component values in the MAX2267/ max2268/max2269 ev kit manual for optimal noise power.
MAX2267/max2268/max2269 +2.7v, single-supply, cellular-band linear power amplifiers 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. 16 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2001 maxim integrated products printed usa is a registered trademark of maxim integrated products. transistor count: 1256 chip information package information tssop.eps top view max2268 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 bias in1 n.c. bias2h n.c. gnd nfp n.c. n.c. out1 v cc shdn bias1h v cc n.c. out1 shdn tssop-ep pin configurations/ functional diagrams (continued)

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