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general description the max2244/max2245/max2246 single-supply, low- voltage power amplifiers (pas) are designed for 20dbm bluetooth class 1 applications in the 2.4ghz to 2.5ghz band. the max2244/max2245 deliver a peak output power of 22dbm with greater than 20db output-power control range. the 22dbm output power compensates for the filter loss between the pa and the antenna, allowing 20dbm to be delivered to the antenna. the max2246 pro- vides a peak output power of 20dbm for a 30% reduction in supply current. the pas integrate a power detector and closed-loop power-control circuitry to provide nearly constant output power over the full range of supply voltage, temperature, and input power level. the voltage at the analog control input precisely controls the output power level. the max2244/max2245/max2246 feature a low-current shutdown mode through a simple logic input. internal cir- cuitry automatically controls the ramp-up/down of the output power level during turn-on and turn-off to meet bluetooth spurious emissions requirements. the devices operate from a 3v to 3.6v single supply. the max2244/max2246 have a power-control voltage range of 0.5v to 2v, and the max2245 has a control voltage range of 0.9v to 2.2v. the devices are pack- aged in a miniature ultra chip-scale package (ucsp), significantly reducing the required board area. applications bluetooth class 1 radios 802.11 fhss/homerf radios 2.4ghz cordless phones features 2.4ghz to 2.5ghz operation accurate closed-loop output power control over full temperature, supply, and input power range convenient analog power-control interface 22dbm peak output power (max2244/max2245) 20dbm peak output with 30% reduced supply current (max2246) internal bandwidth-limited power ramping 50 ? integrated input match 0.5a shutdown supply current ultra chip-scale package (1.56mm ? 1.56mm) max2244/max2245/max2246 2.5ghz, 22dbm/20dbm power amplifiers with analog closed-loop power control ________________________________________________________________ maxim integrated products 1 ordering information 19-2204; rev 2; 8/03 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. part temp range bump package top mark max2244 ebl-t -40 c to +85 c 9 ucsp*-9 aap max2245 ebl-t -40 c to +85 c 9 ucsp*-9 aaq max2246 ebl-t -40 c to +85 c 9 ucsp*-9 aay * ucsp reliability is integrally linked to the user's assembly methods, circuit board material, and environment. see the ucsp reliability notice in the ucsp reliability section of this data sheet for more information. bluetooth is a trademark of ericsson corp. ucsp is a trademark of maxim integrated products, inc. match match bias shutdown analog interface match power detector c1 c3 b2 a3 b3 a2 c2 rfin/ shdn pc gnd gnd rfout v cc2 v cc1 a1 b1 max2244 control amp max2245 max2246 gnd gnd functional diagram pin configuration appears at end of data sheet. homerf is a trademark of the homerf working group.
max2244/max2245/max2246 2.5ghz, 22dbm/20dbm power amplifiers with analog closed-loop power control 2 _______________________________________________________________________________________ absolute maximum ratings dc electrical characteristics (typical application circuit, v cc = 3v to 3.6v, no rf signals applied, v shdn 2v, v pc = 0, t a = -40 c to +85 c, unless otherwise noted. typical values are at v cc = 3v, t a = +25 c, 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. v cc1 , v cc2 , rfout to gnd .................................-0.3v to +6.0v rfin/ shdn , pc to gnd.............................-0.3v to (v cc + 0.3v) rf input power (rfin)....................................................+10dbm load mismatch (vswr) without damage ..............................6:1 continuous power dissipation (t a = +85 c) 9-pin ucsp (derate 8.8mw/ c above t a = +85 c).....700mw operating temperature range ...........................-40 c to +85 c junction temperature .....................................................+150 c storage temperature range .............................-65 c to +150 c continuous operating lifetime............10 years x 0.935 (t a - 65 c) (for operating temperature 65 c < t a < 85 c) parameter conditions min typ max units supply voltage 3.0 3.6 v v pc = 0.5v, t a = +25 c6583 v pc = 0.5v, t a = -40 c to +85 c98 v pc = 2v, t a = +25 c 172 200 max2244 p rf in = 0 to 4d bm , 2.45gh z v pc = 2v, t a = -40 c to +85 c 205 v pc = 0.9v, t a = +25 c6587 v pc = 0.9v, t a = -40 c to +85 c93 v pc = 2.2v, t a = +25 c 179 195 max2245 p rf in = 0 to 4d bm , 2.45gh z v pc = 2.2v, t a = -40 c to +85 c 208 v pc = 0.5v, t a = +25 c4255 v pc = 0.5v, t a = -40 c to +85 c61 v pc = 2v, t a = +25 c 118 140 supply current (note 2) max2246 p rfin = 0 to 4dbm, 2.45ghz v pc = 2v, t a = -40 c to +85 c 144 ma shutdown supply current shdn = gnd 0.5 10 a shdn input voltage high 2.0 v shdn input voltage low 0.6 v shdn input current -1 1 a max2244/max2246 0.5 2.0 pc input voltage range active control range max2245 0.9 2.5 v max2244/max2246, v pc = 0 to 2.5v -15 5 pc input current max2245, v pc = 0 to 3v -20 10 a caution! esd sensitive device
max2244/max2245/max2246 2.5ghz, 22dbm/20dbm power amplifiers with analog closed-loop power control _______________________________________________________________________________________ 3 ac electrical characteristics (typical application circuit, v cc = 3v, p rfin = 0 to 4dbm, f rfin = 2.45ghz, 50 ? system, v shdn 2v, t a = +25 c, unless otherwise noted. typical values are at v cc = 3v, p rfin = 2dbm, f rfin = 2.45ghz, t a = +25 c, unless otherwise noted.) note 1: limits are 100% production tested at t a = +25 c. limits over the entire operating temperature range are guaranteed by design and characterization, but are not production tested. note 2: guaranteed by design and characterization. note 3: assumes the output is optimally matched to cover the 2.4ghz to 2.5ghz band. note 4: valid for the case in which the output stage is matched with a two-section transmission line, lowpass matching network to minimize the 2nd and 3rd harmonics, as shown in the typical application circuit. note 5: output measured in a 100khz rbw. power on/off duty cycle = 50%. test signal: gfsk, bt = 0.5, 1 bit/symbol, 1mbps, frequency deviation = 175khz. note 6: the total turn-on and settling time required for the pa output power to settle to within 1db of the final value. note 7: the total turn-off time for the pa output power to drop to -10dbm. parameter conditions min typ max units frequency range (note 3) 2.4 2.5 ghz input power 0 4 dbm max2244, v pc = 0.5v t a = +25 c047 t a = +25 c 20.5 22.0 23.5 max2244, v pc = 2v t a = -40 c to +85 c2024 max2245, v pc = 0.9v t a = +25 c047 t a = +25 c 20.5 22.0 23.5 max2245, v pc = 2.2v t a = -40 c to +85 c2024 max2246, v pc = 0.5v t a = +25 c -4.5 0.5 5.5 t a = +25 c192021 output power (note 2) max2246, v pc = 2v t a = -40 c to +85 c1721 dbm max2244/max2245 -7 -1 harmonic output (notes 2, 4) p rfout at any level max2246 -16 -13 dbm shutdown mode output (note 2) v shdn 0.6v, p rfin = 4dbm -30 dbm frequency offset = 500khz -20 dbc frequency offset = 1.5mhz -20 in-band spurious (notes 2, 3, 5) frequency offset = 2.5mhz -40 dbm nonharmonic spurious output (note 2) all power levels, load vswr 3:1 -30 dbm max2244/max2246, v pc steps from 0 to 2v 4 power ramp turn-on time (notes 2, 6) max2245/max2246, v pc steps from 0 to 2.5v 4 s max2244, v pc steps from 2v to 0 1.8 power ramp turn-off time (notes 2, 7) max2245, v pc steps from 2.5v to 0 1.8 s input vswr (note 2) r s = 50 ? , over full p rfin range 1.5:1 2:1
max2244/max2245/max2246 2.5ghz, 22dbm/20dbm power amplifiers with analog closed-loop power control 4 _______________________________________________________________________________________ typical operating characteristics (typical application circuit, v cc = 3v, p rfin = 2dbm, f rfin = 2.45ghz, shdn = v cc , t a = +25 c, unless otherwise noted.) -20 -10 10 0 20 0 1.0 0.5 1.5 2.0 2.5 max2244 output power vs. power control (v pc ) max2244-46 toc01 v pc (v) output power (dbm) t a = +85 c t a = +25 c t a = -40 c -20 -10 10 0 20 0 1.0 0.5 1.5 2.0 2.5 max2244 output power vs. power control (v pc ) max2244-46 toc02 v pc (v) output power (dbm) v cc = 5.0v v cc = 3v v cc = 4v 200 150 100 50 0 0 1.0 0.5 1.5 2.0 2.5 max2244 supply current vs. power control (v pc ) max2244-46 toc03 v pc (v) supply current (ma) t a = +85 c t a = +25 c t a = -40 c max2244 output power vs. frequency max2244-46 toc04 frequency (ghz) output power (dbm) 2.48 2.46 2.44 2.42 5 10 15 20 25 0 2.40 2.50 v pc = 0.5v v pc = 1.0v v pc = 2.0v max2244 output power vs. input power max2244-46 toc05 input power (dbm) output power (dbm) 0 -5 -10 5 10 15 20 25 0 -15 5 v pc = 2v v pc = 1v v pc = 0.5v max2244 harmonic output spectrum max2244-46toc06 10db/div 0.1 frequency (ghz) 13 0dbm f o 2f o 3f o 4f o 5f o v pc = 2v max2244 fsk modulated output spectrum max2244-46 toc07 10db/div 0dbm v pc = 2v 2.45ghz 0.5mhz/div max2244 power-on/off characteristics max2244-46 toc08 time (2 s/div) output power (dbm) -30 -20 -10 0 10 20 v shdn (v) 0 1 2 3 4 5 30 -40 p rfout v shdn
typical operating characteristics (continued) (typical application circuit, v cc = 3v, p rfin = 2dbm, f rfin = 2.45ghz, shdn = v cc , t a = +25 c, unless otherwise noted.) max2244/max2245/max2246 2.5ghz, 22dbm/20dbm power amplifiers with analog closed-loop power control _______________________________________________________________________________________ 5 -20 0 -10 10 20 0 1.0 0.5 1.5 2.0 2.5 3.0 max2245 output power vs. power control (v pc ) max2244-46 toc09 v pc (v) output power (dbm) t a = +25 c t a = -40 c t a = +85 c -20 -10 0 10 20 0 1.0 0.5 1.5 2.0 2.5 3.0 max2245 output power vs. power control (v pc ) max2244-46 toc10 v pc (v) output power (dbm) v cc = 3v v cc = 4v v cc = 5v 200 150 100 50 0 0 1.5 0.5 1.0 2.0 2.5 3.0 max2245 supply current vs. power control (v pc ) max2244-46 toc11 v pc (v) supply current (ma) t a = +25 c t a = -40 c t a = +85 c max2245 output power vs. frequency max2244-46 toc12 frequency (ghz) output power (dbm) 2.48 2.46 2.44 2.42 5 10 15 20 25 0 2.40 2.50 v pc = 1v v pc = 1.5v v pc = 2.5v max2245 output power vs. input power max2244-46 toc13 input power (dbm) output power (dbm) 0 -5 -10 5 10 15 20 25 0 -15 5 v pc = 2.5v v pc = 1.5v v pc = 1v max2245 harmonic output spectrum max2244/45 toc14 10db/div 0dbm 0.1 frequency (ghz) 13 f o 2f o 3f o 4f o 5f o v pc = 2.2v max2245 fsk modulated output spectrum max2244-46 toc15 1 0db/div 2.45ghz 0.5mhz/div 0dbm v pc = 2.2v shutdown current vs. temperature max2244-46 toc16 temperature ( c) shutdown current (na) 80 60 40 20 0 -20 200 400 600 800 0 -40
max2244/max2245/max2246 2.5ghz, 22dbm/20dbm power amplifiers with analog closed-loop power control 6 _______________________________________________________________________________________ -20 -10 10 0 20 0 1.0 0.5 1.5 2.0 2.5 max2246 output power vs. power control (v pc ) max2244-46 toc017 v pc (v) output power (dbm) t a = +85 c t a = +25 c t a = -40 c -20 -10 10 0 20 0 1.0 0.5 1.5 2.0 2.5 max2246 output power vs. power control (v pc ) max2244-46 toc18 v pc (v) output power (dbm) v cc = 5v v cc = 3v v cc = 4v 200 150 100 50 0 0 1.0 0.5 1.5 2.0 2.5 max2246 supply current vs. power control (v pc ) max2244-46 toc19 v pc (v) supply current (ma) t a = +85 c t a = +25 c t a = -40 c max2246 output power vs. frequency max2244-46 toc20 frequency (ghz) output power (dbm) 2.48 2.46 2.44 2.42 5 10 15 20 25 0 2.40 2.50 v pc = 0.5v v pc = 1v v pc = 2v max2246 output power vs. input power max2244-46 toc21 input power (dbm) output power (dbm) 0 -5 -10 5 10 15 20 25 0 -15 5 v pc = 2v v pc = 1v v pc = 0.5v max2246 harmonic output spectrum max2244-46 toc22 10db/div 0.1 frequency (ghz) 13 0dbm f o 2f o 3f o 4f o 5f o v pc = 2v max2246 fsk modulated output spectrum max2244-46 toc23 10db/div 0dbm v pc = 2v 2.45ghz 0.5mhz/div s11 of rfin max2244-46 toc24 frequency (ghz) s11 magnitude (db) 2.9 2.8 2.7 2.6 2.5 2.4 2.3 2.2 2.1 -25 -20 -15 -10 -5 0 -30 2.0 3.0 2 1 1: -20.322db at 2.4ghz 2: -13.482db at 2.5ghz typical operating characteristics (continued) (typical application circuit, v cc = 3v, p rfin = 2dbm, f rfin = 2.45ghz, shdn = v cc , t a = +25 c, unless otherwise noted.)
max2244/max2245/max2246 2.5ghz, 22dbm/20dbm power amplifiers with analog closed-loop power control _______________________________________________________________________________________ 7 detailed description the max2244/max2245/max2246 are nonlinear pas guaranteed to operate over a 2.4ghz to 2.5ghz fre- quency range from a 3v to 3.6v single supply. the max2244/max2245 provide 22dbm output power, and the max2246 provides 20dbm output power at the highest power setting. the signal path consists of three amplifier stages: an input amplifier stage with adjustable gain, and two fixed-gain amplifier stages. the pas have a dual-function input (rfin/ shdn ) for the rf input signal and shutdown control. the shut- down function is controlled with cmos level signals, with a logic low putting the pa into low-current shut- down. the rf input is internally matched to 50 ? , elimi- nating the need for external matching. the max2244/max2245/max2246 have interstage matching to optimize output power and efficiency. the last amplifier stage is open collector using an external pullup inductor or rf choke. the output match for the pas also acts as a lowpass filter that attenuates harmonics. these pas provide closed-loop power control to pro- vide a stable output power with variations in tempera- ture, v cc , and rf input power. the control amplifier varies the gain of the first stage to equalize the power- control voltage and the internal power-detector output. the max2244/max2246 have a 0.5v to 2v power-con- trol voltage range, and the max2245 has a 0.9v to 2.2v power-control voltage range. the internal bias circuit provides separate bias volt- ages and currents to the amplifier stages. an internal lowpass rc filter isolates the bias currents, preventing them from being corrupted by the rf signals. the bias circuit design also ensures the stability of the pa when connected to high vswr loads over all power levels. applications information power-supply connections the max2244/max2245/max2246 are designed to oper- ate from a single, positive supply voltage (v cc ) with three connections made to v cc : v cc1 , v cc2 , and rfout bias. join the v cc traces together using a star layout, which reduces crosstalk and promotes stable operation. at the common point of the star, connect 10f and 10nf de- coupling capacitors to ground to reduce noise and handle current transients. additionally, each leg requires a high- frequency bypass capacitor and a 1nf power-supply decoupling capacitor near the ic. high-frequency bypass capacitors are required close to the ic. for v cc1 , connect a capacitor approximately 1mm from the v cc1 pad. the distance of the capacitor from the pad affects the impedance at v cc1 , which affects output power of the first stage. for optimal out- put power from stage 1, v cc1 requires 0.3nh to 0.4nh inductance. the output power of the second stage is affected by the impedance presented to v cc2 , which is controlled by the distance between the v cc2 pad and its bypass capacitor. for optimal electrical distance, see figure 1 and table 1. rfout must be pulled up to v cc through an inductor or an inductive transmission line. if using a transmission line, a high-frequency bypass capacitor from v cc to ground is necessary to terminate the transmission line and set its electrical length. the inductance formed by the length of the transmission line is part of the output- matching network, and therefore is critical. see the output matching section for more information on rfout requirements. pin description pin name description a1 pc power-control voltage input. adjust pc between 0.5v and 2v (max2244/max2246) or 0.9v to 2.2v (max2245) to adjust output power. drive pc below 0.3v to shut down the control loop and put the device in standby mode. a2 v cc2 dc supply-voltage connection for the 2nd stage a3, b2, c1, c3 gnd ground connection. connect to the pc board ground plane. provide inductance connection as low as is practical to the ground plane. b1 rfin/ shdn rf input and digital shutdown control input. rf path internally dc-blocked and matched to 50 ? . digital shutdown path is connected to the bias circuitry through a resistor. b3 rfout pa open-collector output. requires external pullup inductance for v cc bias and external matching network for optimum output power and efficiency. c2 v cc1 dc supply-voltage connection for the 1st stage, bias, and control circuitry
max2244/max2245/max2246 place the 1nf power-supply decoupling capacitors between the star connection and the smaller bypass capacitors and close to the ic. larger trace lengths between the decoupling capacitors and the ic increase the parasitic trace inductance, which, when combined with the capacitors on v cc1 and v cc2 , can form an lc tank and introduce instability in the mhz range. if this happens, you can add a small-value resistor (~10 ? ), between the 1nf capacitor and ground to de-q the capacitor and dampen the oscillation. 2.5ghz, 22dbm/20dbm power amplifiers with analog closed-loop power control 8 _______________________________________________________________________________________ c8 c9 1nf c3 1nf c2 10nf rfin r2 1k ? c5 10pf c10 c11 1nf c6 rfout t2 t1 c7 c1 10 f c4 27pf shdn v cc dac r2 2.5k ? a1 pc rfin/ shdn b1 c1 a2 b2 c2 a3 b3 c3 v cc2 gnd gnd rfout v cc1 gnd gnd transceiver ic max2244 max2245 max2246 t3 t4 figure 1. max2244/max2245/max2246 typical application circuit component max2244 max2245 max2246 c6 10pf 5.6pf 10pf c7 1.2pf 1.2pf 1.3pf c8 5pf 5pf 27pf c10 100pf 100pf 27pf t1 50 ? , 17.6 50 ? , 18 50 ? , 25 t2 50 ? , 50 50 ? , 53 50 ? , 50 t3 50 ? , 5.3 50 ? , 5.3 50 ? , 5.3 t4 50 ? , 5.3 50 ? , 5.9 50 ? , 8.9 table 1. typical application circuit component values note: electrical lengths given for 2.4ghz.
max2244/max2245/max2246 2.5ghz, 22dbm/20dbm power amplifiers with analog closed-loop power control _______________________________________________________________________________________ 9 rf input/ shdn rfin/ shdn is a dual-function input for a 2.4ghz to 2.5ghz rf signal and a dc-coupled shutdown function. the input port is internally matched to 50 ? , making it simple to interface the pas to a 50 ? source without external matching components. the pas are designed to amplify input signal levels of 0 to 4dbm and, although the pas function for input signals outside this range, out- put power and efficiency degrade. note: ensure that the rf signal is present at the input when the pa is enabled. if the rf signal is not present at startup, the pa functions like any closed-loop control system and automatically goes into a high-gain state, amplifying and transmitting noise. avoid this mode of operation. the second function of the rfin/ shdn is shutdown con- trol. a dc voltage at the input port digitally controls the on/off state with standard cmos levels. the pa is in low- current shutdown when the dc voltage is a valid logic low and is active for a valid logic high. connect the shdn signal to the rfin/ shdn through a 1k ? resistor. connect the rf signal to the rfin/ shdn with a 10pf capacitor in series to block any dc from corrupting the shdn signal. output matching the output structure of these nonlinear pas is an open- collector transistor that requires external impedance matching and pullup inductance for biasing. the recom- mended output matching network is shown in the typical application circuits (figure 1). the impedance presented to the rfout pin is shown in figure 2 and table 2. this impedance is specified relative to a reference plane at the amplifier output into the matching network and load. the matching network is for impedance transformation that transforms 6 ? to 50 ? with the specified maximum output power. the network also forms a lowpass filter that provides attenuation for the 2nd and 3rd harmonics. a shunt capacitor (c7) is needed to perform the transforma- tion, and the inductive 50 ? transmission line (t2) is need- ed to match that capacitance. a larger capacitor can be used to increase the maximum output power, but the transmission line also must be increased to maintain a match with c7. a dc-blocking capacitor (c6) of 5pf to 10pf is necessary between the pa output and the trans- mission line. the pullup inductance from rfout to v cc serves three main purposes: it resonates out the capacitive pa output, provides biasing for the output stage, and becomes a high-frequency choke to reduce rf energy from coupling into v cc . the pullup inductance normally is a 50 ? trans- mission line (t1); however, chip inductors can be used instead. the typical application circuit terminates the transmission line with a capacitor (c6). analog power control (pc) the pas use a closed-loop power-control system for consistent output power across input power, supply volt- age, and temperature. output power is internally moni- tored and compared to the desired setting on pc. the control amplifier then adjusts the first-stage variable-gain amplifier until the output power matches the desired set- ting. the result is that the output power is controlled by the voltage applied to pc. the power-control voltage range at pc for the max2244/max2246 is 0 to 2v. output power remains at its minimum for v pc between 0 and 0.4v. at approxi- mately 0.4v, output power increases exponentially until v pc = 2v, where output power is 22dbm (max2244) or 20dbm (max2246). see figures 3a and 3c for the rela- tionship between v pc and output power for the max2244 and max2246, respectively. likewise, the max2245 output power is controlled by v pc , but with a different power-control range. the power- control voltage range of the max2245 is 0 to 2.2v, with output power beginning to increase when v pc = 0.9v. figure 3b shows the v pc and output power relationship for the max2245. matching impedance for rfout pin max2244: 6.26 ? + j13.56 ? at 2.45ghz max2245: 6.35 ? + j13.25 ? at 2.45ghz max2246: 5.50 ? + j13.50 ? at 2.45ghz smith chart figure 2. impedance of matching network at rfout pin max2244 max2245 max2246 frequency ghz real ( ? ) imag ( ? ) real ( ? ) imag ( ? ) real ( ? ) imag ( ? ) 2.40 6.47 13.2 6.61 12.94 5.73 13.01 2.45 6.26 13.5 6.35 13.25 5.50 13.50 2.50 6.06 13.9 6.11 13.59 5.27 14.02 table 2. matching network impedance
max2244/max2245/max2246 2.5ghz, 22dbm/20dbm power amplifiers with analog closed-loop power control 10 ______________________________________________________________________________________ -20 -15 -10 -5 0 5 10 15 20 25 0 0.50 1.00 1.50 2.00 2.50 max2244 typical output power p out vs. v pc v pc (v) p out (dbm) v pc (v) p out (dbm) v pc (v) p out (dbm) v pc (v) p out (dbm) v pc (v) p out (dbm) v pc (v) p out (dbm) 0 -9.45 0.42 -3.24 0.54 5.59 0.90 13.76 1.70 20.79 0.30 -9.45 0.43 -1.85 0.56 6.35 0.95 14.45 1.80 21.24 0.32 -9.45 0.44 -0.64 0.58 7.04 1.00 15.10 1.90 21.63 0.36 -9.50 0.45 0.43 0.60 7.67 1.10 16.25 2.00 21.91 0.37 -9.55 0.46 1.24 0.65 9.05 1.20 17.26 2.10 22.07 0.38 -10.79 0.47 1.97 0.70 10.22 1.30 18.16 2.20 22.08 0.39 -15.60 0.48 2.62 0.75 11.26 1.40 18.95 2.30 22.09 0.40 -8.65 0.50 3.79 0.80 12.19 1.50 19.65 2.40 22.10 0.41 -5.41 0.52 4.75 0.85 13.01 1.60 20.26 2.50 22.11 figure 3a. max2244 typical output power vs. power-control voltage
max2244/max2245/max2246 2.5ghz, 22dbm/20dbm power amplifiers with analog closed-loop power control ______________________________________________________________________________________ 11 -20 -15 -10 -5 0 5 10 15 20 25 0 0.50 1.00 1.50 2.00 2.50 max2245 typical output power p out vs. v pc v pc (v) p out (dbm) v pc (v) p out (dbm) v pc (v) p out (dbm) v pc (v) p out (dbm) v pc (v) p out (dbm) 0 -8.00 0.90 0.91 0.99 6.90 1.80 20.27 0.82 -8.00 0.91 1.91 1.00 7.33 1.90 20.79 0.83 -8.14 0.92 2.78 1.10 10.64 2.00 21.22 0.84 -8.46 0.93 3.50 1.20 12.99 2.10 21.59 0.85 -17.51 0.94 4.20 1.30 14.84 2.20 21.91 0.86 -8.00 0.95 4.83 1.40 16.33 2.30 22.15 0.87 -4.13 0.96 5.39 1.50 17.61 2.40 22.20 0.88 -1.90 0.97 5.93 1.60 18.70 2.50 22.20 0.89 -0.35 0.98 6.44 1.70 19.59 figure 3b. max2245 typical output power vs. power-control voltage
max2244/max2245/max2246 2.5ghz, 22dbm/20dbm power amplifiers with analog closed-loop power control 12 ______________________________________________________________________________________ -20 -15 -10 -5 0 5 10 15 20 25 0 0.50 1.00 1.50 2.00 2.50 max2246 typical output power p out vs. v pc v pc (v) p out (dbm) v pc (v) p out (dbm) v pc (v) p out (dbm) v pc (v) p out (dbm) v pc (v) p out (dbm) v pc (v) p out (dbm) 0 -17.80 0.40 -16.00 0.49 -0.31 1.00 12.26 1.90 19.48 0.10 -17.80 0.41 -11.80 0.50 0.30 1.10 13.43 2.00 19.95 0.20 -17.80 0.42 -8.74 0.51 2.75 1.20 14.60 2.10 20.33 0.30 -17.78 0.43 -6.65 0.52 4.75 1.30 15.39 2.20 20.66 0.35 -17.65 0.44 -5.02 0.53 6.03 1.40 16.21 2.30 20.81 0.36 -17.60 0.45 -3.67 0.54 7.26 1.50 16.97 2.40 20.82 0.37 -17.53 0.46 -2.65 0.55 8.35 1.60 17.67 2.50 20.82 0.38 -17.44 0.47 -1.78 0.56 9.28 1.70 18.31 0.39 -17.49 0.48 -1.02 0.57 10.89 1.80 18.93 figure 3c. max2246 typical output power vs. power-control voltage
layout a good layout is necessary to achieve high-output power with good efficiency. a solid ground plane must be used, with any free board space also being grounded. connect any ground planes using multiple vias and low- inductance connections. parasitic inductance reduces output power and efficiency, so place the ground return of the chip components as close to the ic as possible. the max2244 ev kit and max2246 ev kit pc boards use via-on-pad for low-inductance connections. use a star connection for the power-supply traces that connect to v cc1 , v cc2 , and rfout. at a common point of the power-supply traces, connect 10nf and 10f decoupling capacitors to ground. place 1nf capacitors closer to the ic on each v cc trace with the small value matching capacitors closest to the ic. the distance of the matching capacitors from the ic is critical. see the power supply connections section for more information. the layout of the output section is important because 50 ? traces are used as part of the matching. see the output matching section for component information. the 50 ? traces can be bent, but be aware of how the characteristics of the transmission line change, and compensate for them accordingly. use a 50 ? line to directly connect to the input. place one pad of the 1k ? resistor for the shdn signal directly on the 50 ? line or as close to the line as possible. any trace connected to the 50 ? line changes the line s characteristic impedance, causing power loss. the lay- out of the trace connecting pc is noncritical. the chip-scale ic package uses a bump pitch of 0.5mm (19.7 mil) and a bump diameter of 0.3mm (~12 mil). therefore, lay out the solder pad spacing on 0.5mm (19.7 mil) centers. use a pad size of 0.25mm (~10 mil) and a solder mask opening of 0.33mm (13 mil). round or square pads are permissible. refer to the maxim document, wafer level ultra-chipscale packaging, for detailed information on ucsp layout and handling. prototype chip installation alignment keys on the pc board around the chip are helpful in prototype assembly. the max2244 and max2246 ev kit pc boards have l-shaped alignment keys at the diagonal corners of the chip. align the chip on the board before any other components are placed, and place the board on a hotplate or hot surface until the solder starts melting. remove the board from the hotplate without disturbing the position of the chip. let it cool to room temperature before further processing the board. marking information ucsp reliability the ucsp is a unique package that greatly reduces board space compared to other packages. ucsp relia- bility is integrally linked to the user s assembly methods, circuit board material, and usage environment. closely review these areas when considering using a ucsp. performance through operating life test and moisture resistance remains uncompromised as they are primari- ly determined by the wafer-fabrication process. mechanical stress performance is a greater considera- tion for a ucsp. ucsp solder-joint contact integrity must be considered because the package is attached through direct solder contact to the user s pc board. testing to characterize the ucsp reliability performance shows that it is capable of performing reliably through environmental stresses. results of environmental stress tests and addi- tional usage data and recommendations are detailed in the ucsp application note, available on maxim s web- site, www.maxim-ic.com. users should also be aware that, as with any intercon- nect system there are electromigration-based current limits that, in this case, apply to the maximum allowable current in the bumps. reliability is a function of this cur- rent, the duty cycle, lifetime, and bump temperature. see the absolute maximum ratings section for any specific limitations, listed under continuous operating lifetime. chip information transistor count: 727 process: bipolar max2244/max2245/max2246 2.5ghz, 22dbm/20dbm power amplifiers with analog closed-loop power control ______________________________________________________________________________________ 13 aaa xxx pin 1 id aaa: product id code xxx: lot code a1 pc rfin/ shdn b1 c1 a2 b2 c2 a3 b3 c3 v cc2 gnd gnd rfout v cc1 gnd gnd a b c 1 2 3 top view (bumps at the bottom) ucsp pin configuration
max2244/max2245/max2246 2.5ghz, 22dbm/20dbm power amplifiers with analog closed-loop power control maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circuit patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. 14 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ? 2003 maxim integrated products printed usa is a registered trademark of maxim integrated products. 9lucsp, 3x3.eps i 1 1 21-0093 package outline, 3x3 ucsp 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 .)
max2244 part number table english ? ? ?Z ? ??? what's new products solutions design appnotes support buy company members didn't find what you need? notes: 1. see the max2244 quickview data sheet for further information on this product family or download the max2244 full data sheet (pdf, 328kb). 2. other options and links for pu rchasing parts are listed at: http://www.maxim-ic.com/sales . 3. didn't find what you need? ask our applications engineers. expert assistance in finding parts, usually within one business day. 4. part number suffixes: t or t&r = tape and reel; + = rohs/lead-free ; # = rohs/lead-exempt. more: see full data sheet or part naming conventions . 5. * some packages have variations, listed on the drawing. "pkgcode/v ariation" tells which variation the product uses. part number free sample buy direct package: type pins size drawing code/var * temp rohs/lead-free? materials analysis max2244ebl-t10 buy rohs/lead-free: no max2244ebl sample buy ucsp;9 pin; dwg: 21-0093l (pdf) use pkgcode/variation: b9-1 * 0c to +70c rohs/lead-free: no materials analysis max2244ebl-t buy ucsp;9 pin; dwg: 21-0093l (pdf) use pkgcode/variation: b9-1 * 0c to +70c rohs/lead-free: no materials analysis contact us: feedback, questions rate this page mail this page copyright ? 2007 by maxim integrated products, dallas semiconductor ? legal notices ? privacy policy pa g e 1 of 2 max2244 - part number table - maxim/dallas 31-jul-2007 mhtml:file://c:\temp \maxm\max2244ebl-t10.mht
pa g e 2 of 2 max2244 - part number table - maxim/dallas 31-jul-2007 mhtml:file://c:\temp \maxm\max2244ebl-t10.mht
max2245 part number table english ? ? ?Z ? ??? what's new products solutions design appnotes support buy company members didn't find what you need? notes: 1. see the max2245 quickview data sheet for further information on this product family or download the max2245 full data sheet (pdf, 328kb). 2. other options and links for pu rchasing parts are listed at: http://www.maxim-ic.com/sales . 3. didn't find what you need? ask our applications engineers. expert assistance in finding parts, usually within one business day. 4. part number suffixes: t or t&r = tape and reel; + = rohs/lead-free ; # = rohs/lead-exempt. more: see full data sheet or part naming conventions . 5. * some packages have variations, listed on the drawing. "pkgcode/v ariation" tells which variation the product uses. part number free sample buy direct package: type pins size drawing code/var * temp rohs/lead-free? materials analysis max2245ebl-t10 buy rohs/lead-free: no max2245ebl sample buy ucsp;9 pin; dwg: 21-0093l (pdf) use pkgcode/variation: b9-1 * 0c to +70c rohs/lead-free: no materials analysis max2245ebl-t buy ucsp;9 pin; dwg: 21-0093l (pdf) use pkgcode/variation: b9-1 * 0c to +70c rohs/lead-free: no materials analysis contact us: feedback, questions rate this page mail this page copyright ? 2007 by maxim integrated products, dallas semiconductor ? legal notices ? privacy policy pa g e 1 of 2 max2245 - part number table - maxim/dallas 31-jul-2007 mhtml:file://c:\temp \maxm\max2245ebl-t10.mht
pa g e 2 of 2 max2245 - part number table - maxim/dallas 31-jul-2007 mhtml:file://c:\temp \maxm\max2245ebl-t10.mht
max2246 part number table english ? ? ?Z ? ??? what's new products solutions design appnotes support buy company members didn't find what you need? notes: 1. see the max2246 quickview data sheet for further information on this product family or download the max2246 full data sheet (pdf, 328kb). 2. other options and links for pu rchasing parts are listed at: http://www.maxim-ic.com/sales . 3. didn't find what you need? ask our applications engineers. expert assistance in finding parts, usually within one business day. 4. part number suffixes: t or t&r = tape and reel; + = rohs/lead-free ; # = rohs/lead-exempt. more: see full data sheet or part naming conventions . 5. * some packages have variations, listed on the drawing. "pkgcode/v ariation" tells which variation the product uses. part number free sample buy direct package: type pins size drawing code/var * temp rohs/lead-free? materials analysis MAX2246EBL-t10 buy rohs/lead-free: no MAX2246EBL sample buy ucsp;9 pin; dwg: 21-0093l (pdf) use pkgcode/variation: b9-1 * 0c to +70c rohs/lead-free: no materials analysis MAX2246EBL-t buy ucsp;9 pin; dwg: 21-0093l (pdf) use pkgcode/variation: b9-1 * 0c to +70c rohs/lead-free: no materials analysis contact us: feedback, questions rate this page mail this page copyright ? 2007 by maxim integrated products, dallas semiconductor ? legal notices ? privacy policy pa g e 1 of 2 max2246 - part number table - maxim/dallas 31-jul-2007 mhtml:file://c:\temp \maxm\MAX2246EBL-t10.mht
pa g e 2 of 2 max2246 - part number table - maxim/dallas 31-jul-2007 mhtml:file://c:\temp \maxm\MAX2246EBL-t10.mht

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