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general description the max2642/max2643 low-cost, high third-order inter-cept point (ip3), low-noise amplifiers (lnas) are designed for applications in cellular, ism, smr, and pmr systems. they feature a programmable bias, allowing the ip3 and supply current to be optimized for specific applications. these lnas provide up to 0dbm input ip3 while maintaining a low noise figure of 1.3db. the gain for these devices is typically 17db. the max2642 also features a 13db attenuation step, which extends the lna? dynamic range. both devices feature a shutdown mode that minimizes power consumption. on-chip output matching saves board space by reduc- ing the number of external components. the max2642/max2643 are designed on a low-noise, advanced silicon-germanium (sige) process technolo- gy. they operate from a +2.7v to +5.5v single supply and are available in the ultra-small 6-pin sc70 package. ________________________applications 800mhz/900mhz cellular phones900mhz cordless phones 868mhz/900mhz ism-band wireless data pmr/smr/lmr features ? wide frequency range: 800mhz to 1000mhz ? high output ip3 and adjustable +17dbm at 5.3ma+7dbm at 2.8ma ? low noise figure: 1.3db at 900mhz ? 13db attenuation step (max2642) ? on-chip output matching ? low-power shutdown mode ? +2.7v to +5.5v single-supply operation ? ultra-small sc70-6 package max2642/max2643 900mhz sige, high ip3, low-noise amplifiers ________________________________________________________________ maxim integrated products 1 gnd v cc rfin 16 rfout 5 gnd bias max2642max2643 sc70-6 top view 234 pin configuration 19-1682; rev 0; 4/00 for free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.for small orders, phone 1-800-835-8769. evaluation kit manual follows data sheet ordering information 6 sc70-6 pin-package temp. range -40? to +85? max2642 ext-t part aac top mark 6 sc70-6 -40? to +85? max2643 ext-t aad max2642max2643 rf input gnd rfin rfout ( ) are for max2643. c13.3pf l1 8.7nh bias v cc v cc 47pf r bias 510 rf output 33k (10k) low gain (enable) high gain(shutdown) bias typical operating circuit downloaded from: http:///
max2642/max2643 900mhz sige, high ip3,low-noise amplifiers 2 _______________________________________________________________________________________ absolute maximum ratings dc electrical characteristics?ax2642(v cc = +2.7v to +5.5v, t a = -40? to +85?, no rf signal applied, rfin and rfout are ac-coupled and terminated to 50 , high- gain mode. typical values are at v cc = 3.0v, t a = +25?, unless otherwise noted.) (notes 1, 2, 3) dc electrical characteristics?ax2643(v cc = +2.7v to +5.5v, t a = -40? to +85?, no rf signal applied, rfin and rfout are ac-coupled and terminated to 50 . typical values are at v cc = 3.0v, t a = +25?, unless otherwise noted.) (notes 1, 8, 9) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. v cc to gnd ..............................................................-0.3v to +6v rfout to gnd...........................................-0.3v to (v cc + 0.3v) rfin to gnd ..................................................................0 to 0.9v rfin power (50 source) ................................................+5dbm bias to gnd ................................................................0 to +0.3v operating temperature range ...........................-40? to +85? maximum junction temperature .....................................+150? continuous power dissipation (t a = +70?) sc70-6 (derate 3.1mw/? above +70?) ...................245mw storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? parameter conditions min typ max units supply voltage 2.7 5.5 v high-gain mode, r bias = 510 , t a = +25 c 5.3 6.7 r bias = 510 , t a = -40 c to +85 c 7.5 r bias = 806 3.6 r bias = 1.1k 2.8 operating supply current low-gain mode, r bias = 510 , t a = 25 c 5.9 ma shutdown supply current bias = unconnected (see applications information ) 0.2 ma high-gain mode (note 4) 0.6 gain control voltage input low-gain mode (note 5) 2.0 v high-gain mode (note 6) -10 0 gain control input current low-gain mode (note 7) 0 50 a parameter conditions min typ max units supply voltage 2.7 5.5 v r bias = 510 , t a = +25 c 5.1 6.5 r bias = 510 , t a = -40 c to +85 c 7.3 r bias = 806 3.4 operating supply current r bias = 1.1k 2.6 ma shutdown supply current shutdown mode (see applications information ) 0.2 10 a normal operation (note 10) 2.0 shutdown control input voltage shutdown mode (note 11) 0.6 v normal operation (note 7) 0 10 shutdown control input current shutdown mode (note 6) -5 5 a downloaded from: http:///
max2642/max2643 900mhz sige, high ip3, low-noise amplifiers _______________________________________________________________________________________ 3 ac electrical characteristics(max2642/max2643 ev kits, p rfin = -30dbm, f rfin = 900mhz, input and output are terminated to 50 , v cc = +3.0v, t a = +25 c, r bias = 510 , unless otherwise noted.) (note 12) parameter conditions min typ max units operating frequency range (note 13) 800 1000 mhz gain (note 14) t a = +25 c 14.5 16.7 19 db gain variation over temperature t a = -40 c to +85 c 0.35 0.75 db attenuation step max2642 only 13 db r bias = 510 0 r bias = 806 -5 input third-order intercept point(note 15) r bias = 1.1k -10 dbm -18 input 1db compression point max2642, low-gain mode -17 dbm 1.35 1.6 noise figure (note 16) max2642, low-gain mode 4.3 db -10 -12 input return loss max2642, low-gain mode -10 -18 db -10 -14 output return loss max2642, low-gain mode -10 -11 db -20 -26 reverse isolation max2642, low-gain mode -10 -17 db gain-step response time max2642 5 10 s max2643 6 10 shutdown response time max2642, through series switch at bias 12 s note 1: devices are production tested at t a = +25 c. minimum and maximum values are guaranteed by design and characterization over temperature and supply voltage. note 2: high-gain mode is set for the max2642 by connecting rfout to gnd through a 33k resistor. note 3: low-gain mode is applicable only to the max2642 and is set by connecting rfout to v cc through a 33k resistor. note 4: maximum dc voltage through a 33k resistor that sets the max2642 to operate in high-gain mode. note 5: minimum dc voltage through a 33k resistor that sets the max2642 to operate in low-gain mode. note 6: dc current required when rfout is connected to gnd through a 33k resistor (max2642) and 10k resistor (max2643). note 7: dc current required when rfout is connected to v cc through a 33k resistor (max2642) and 10k resistor (max2643). note 8: normal operation is set for the max2643 by connecting rfout to v cc through a 10k resistor. note 9: shutdown is set for the max2643 by connecting rfout to gnd through a 10k resistor. note 10: minimum dc voltage through a 10k resistor that sets the max2643 to operate in normal mode. note 11: maximum dc voltage through a 10k resistor that sets the max2643 to operate in shutdown mode. note 12: min/max limits are guaranteed by design and characterization, except gain is production tested at t a = +25 c. note 13: the part has been characterized at the specified frequency range. operation outside this range is possible but not guar-anteed. note 14: devices are production tested at t a = +25 c. note 15: measured with two input tones, f 1 = 895mhz and f 2 = 905mhz, both at -30dbm per tone. note 16: excludes pc board losses (0.25db typical at the input of the max2642/max2643 ev kit). downloaded from: http:///
max2642/max2643 900mhz sige, high ip3,low-noise amplifiers 4 _______________________________________________________________________________________ typical operating characteristics (max2642/max2643 ev kits, v cc = +3.0v, p rfin = -30dbm, input and output are terminated to 50 , f rfin = 900mhz, r bias = 510 , high-gain mode (low-gain mode is applicable only to the max2642), t a = +25 c, unless otherwise noted.) -15 -11-13 -7-9 -3-5 -1 31 5 0 400 600 800 200 1000 1200 1400 1600 1800 input third-order intercept vs. r bias (high gain) max2642/43-01 r bias ( ) input ip3 (dbm) t a = +85? t a = +25? t a = -40? -15 -1 -3 3 1 7 5 9 11 max2642 input third-order intercept vs. r bias (low gain) max2642/43-02 r bias ( ) input ip3 (dbm) 0 500 1000 1500 2000 -5-7 -9 -11 -13 t a = +85 c t a = +25 c t a = -40 c 0 32 1 4 5 6 800 880 860 820 840 900 920 940 960 980 1000 noise figure vs. frequency max2642/43-03 frequency (mhz) noise figure (db) low gain high gain matched at 900mhz 0 1 2 43 5 6 -40 -20 0 20 40 60 80 100 noise figure vs. temperature max2642/43-04 temperature (?) noise figure (db) low gain high gain -24 -20-22 -14-16 -18 -10-12 -8 0 600 800 200 400 1000 1200 1400 1600 1800 p1db vs. r bias max2642/43-05 r bias ( ) p1db (dbm) t a = -40 c, high gain t a = +85 c, high gain t a = -40 c, low gain t a = +85 c, low gain t a = +25 c, low gain t a = +25 c, high gain -28 -20-24 -12-16 -4-8 0 84 12 -30 -22 -18 -26 -14 -10 -6 -2 2 output power vs. input power max2642/43-06 p in (dbm) p out (dbm) 510 , high gain 1.1k , low gain 510 , low gain 806 , low gain 806 , high gain 1.1k , high gain 0 4 2 86 12 10 14 1816 20 0 400 600 800 200 1000 1200 1400 1600 1800 gain vs. r bias max2642/43-07 r bias ( ) gain (db) -2-4 t a = +85?, high gain t a = -40?, high gain t a = -40?, low gain t a = +85?, low gain t a = +25?, high gain t a = +25?, low gain 4 10 86 12 14 1816 20 2.4 2.8 3.2 3.6 4.0 4.4 4.8 5.2 5.6 gain vs. supply voltage max2642/43-08 v cc (v) gain (db) 2 0 -2 -4 t a = +85 c, high gain t a = -40 c, high gain t a = -40 c, low gain t a = +85 c, low gain t a = +25 c, low gain t a = +25 c, high gain 0 42 86 1210 14 1816 20 800 840 860 880 820 900 920 940 980 960 1000 gain vs. frequency max2642/43-09 frequency (mhz) gain (db) matched at 900mhz low-gain mode high-gain mode downloaded from: http:///
max2642/max2643 900mhz sige, high ip3, low-noise amplifiers _______________________________________________________________________________________ 5 12.6 13.012.8 13.413.2 13.813.6 14.0 800 880 840 920 960 820 900 860 940 980 1000 max2642 attenuation step vs. frequency max2642/43-10 frequency (mhz) attenuation step (db) matched at 900mhz -35 -25-30 -15-20 -5 -10 0 800 880 840 920 960 820 900 860 940 980 1000 return loss vs. frequency (high gain) max2642/43-11 frequency (mhz) attenuation step (db) matched at 900mhz input output -35 -25-30 -15-20 -5 -10 0 800 880 840 920 960 820 900 860 940 980 1000 max2642 return loss vs. frequency (low gain) max2642/43-12 frequency (mhz) return loss (db) matched at 900mhz input output -35 -25-30 -15-20 -5 -10 0 800 880 840 920 960 820 900 860 940 980 1000 reverse isolation vs. frequency max2642/43-13 frequency (mhz) return loss (db) matched at 900mhz low gain high gain -60 -50 -20 -10-30 -40 0 max2642 high/low-gain switch characteristics max2642/43-14 time (400ns/div) output power (dbm) v rfout 0v 3v -90 -70-80 -50-60 -40 -30 -10-20 0 max2643 shutdown characteristics max2642/43-15 time (4 s/div) output power (dbm) v rfout 0v 3v 0 42 86 10 12 14 16 0 400 600 200 800 1000 1200 1400 1600 supply current vs. r bias max2642/43-16 r bias ( ) supply current (ma) t a = +85 c, high gain t a = -40 c, low gain t a = +85 c, low gain t a = +25 c, low gain t a = +25 c, high gain t a = -40 c, high gain 0.0001 0.1 0.01 0.001 10 1 -40 -20 0 20 40 60 80 100 shutdown current vs. temperature max2642/43-17 temperature ( c) shutdown current ( a) v cc = 5.5v v cc = 3.0v 4.0 4.84.4 5.65.2 6.46.0 6.8 7.67.2 8.0 2.4 3.2 3.6 2.8 4.0 4.4 4.8 5.2 5.6 supply current vs. supply voltage max2642/43-18 supply voltage (v) supply voltage (ma) t a = +85 c, high gain t a = -40 c, low gain t a = +85 c, low gain t a = +25 c, low gain t a = +25 c, high gain t a = -40 c, high gain typical operating characteristics (continued) (max2642/max2643 ev kits, v cc = +3.0v, p rfin = -30dbm, input and output are terminated to 50 , f rfin = 900mhz, r bias = 510 , high-gain mode (low-gain mode is applicable only to the max2642), t a = +25 c, unless otherwise noted.) downloaded from: http:///
max2642/max2643 900mhz sige, high ip3,low-noise amplifiers 6 _______________________________________________________________________________________ pin description pin name function 1 bias resistor bias control. connect a resistor, r bias , from bias to ground. r bias sets ip3 and supply current (see applications information ). the current through this pin is approximately 50mv divided by r bias . 2, 5 gnd ground. for optimum performance, provide a low-inductance connection to the ground plane. 3 rfin amplifier input. ac-couple to this pin with a dc-blocking capacitor. external matching network isrequired for optimum performance. 4v cc supply voltage. bypass with a 47pf capacitor directly to ground at the supply pin. additionalbypassing may be necessary for long v cc lines. 6 rfout amplifier output. internally matched to 50 . dc bias on this pin selects gain mode (max2642) or shutdown mode (max2643) (see applications information ). applications information input matching input matching is required for optimum performance.the max2642/max2643 require a simple lc matching network, as shown in the typical operating circuit . to further reduce cost and external component count,replace the external inductor with a microstrip transmis- sion line. the typical operating circuit shows the rec- ommended input-matching networks for the max2642/max2643 at 900mhz. these values are optimized for best simultaneous gain, noise figure, and return-loss performance. to aid in the design of the matching net- work for other frequencies, tables 1 6 list typical device s-parameters for various biases, and tables 7,8, and 9 list typical device noise parameters. attenuation step (max2642) the max2642 s dc bias voltage at rfout serves as an attenuation step input. when the dc voltage atrfout through a 33k resistor is less than +0.6v, the device is in high-gain mode; if the dc voltage is greaterthan +2.0v, the device is in low-gain mode. a standard logic output can be applied as shown in the typical operation circuit . if no bias is applied, the device is in high-gain mode. shutdown for the max2643, the recommended shutdown methodis to set the dc voltage at the rfout pin in a manner similar to the max2642 s attenuation step. that is, when the dc voltage at rfout is below +0.6v, the device isshut down; if the dc voltage is greater than +2.0v, the device is enabled. for the max2642, shutdown is achieved by leaving bias unconnected. figure 1 shows the suggested shutdown methods. avoid capacitance at the bias pin by connecting the bias resistor from bias to the switch. table 10 summarizes the operational modes. layout issues a properly designed pc board is essential to anyrf/microwave circuit. use controlled impedance lines on all high-frequency inputs and outputs. bypass with decoupling capacitors located close to the device v cc pin. for long v cc lines, it may be necessary to add additional decoupling capacitors. these additionalcapacitors can be located farther away from the device package. proper grounding of the gnd pins is essen- tial. if the pc board uses a topside rf ground, connect it directly to all gnd pins. for a board where the ground plane is not on the component layer, the best technique is to connect the gnd pins to the board with a plated through-hole located close to the package. downloaded from: http:///
max2642/max2643 900mhz sige, high ip3, low-noise amplifiers _______________________________________________________________________________________ 7 table 1. max2642/max2643 typical scattering parameters(r bias = 510 , high-gain mode, v cc = +3.0v, t a = +25 c.) freq (mhz) s11 mag s11 phase (degrees) s21 mag s21 phase (degrees) s12 mag s12 phase (degrees) s22 mag s22 phase (degrees) 500 0.832641 -69.5831 2.390806 -119.18 0.010763 166.6047 0.878515 -74.01422 600 0.825168 -83.7622 3.836967 -136.451 0.019608 167.8741 0.731997 -98.95091 700 0.785389 -97.3356 4.983279 -161.126 0.02988 148.5203 0.481344 -125.1027 800 0.73798 -108.682 5.320575 174.5337 0.036197 134.8794 0.215462 -142.0387 820 0.728099 -110.578 5.286 170.3323 0.037193 132.505 0.171633 -141.9486 840 0.718704 -112.499 5.241719 166.3987 0.037266 129.1671 0.135415 -139.9869 860 0.711335 -114.276 5.185213 162.4763 0.039143 128.0447 0.100779 -133.8375 880 0.705742 -115.973 5.118265 158.9238 0.039563 128.4158 0.076864 -121.3533 900 0.699509 -117.585 5.050356 155.6292 0.042586 128.075 0.062918 -102.3972 920 0.695913 -119.117 4.973824 152.4338 0.041805 126.9362 0.06007 -81.32555 940 0.690406 -120.995 4.897571 149.4286 0.04301 122.9564 0.065287 -62.51575 960 0.68522 -122.642 4.826106 146.6999 0.046528 122.0997 0.077374 -50.8638 980 0.681722 -124.345 4.735407 143.8275 0.04524 121.0474 0.090494 -44.30662 1000 0.675328 -126.035 4.650673 141.4611 0.046036 120.1779 0.103072 -40.69565 1100 0.657582 -134.195 4.29304 130.7613 0.053825 116.4169 0.156945 -34.00603 1200 0.635999 -141.558 3.998256 121.5475 0.061434 109.6365 0.198686 -32.62157 1300 0.616881 -147.886 3.777511 113.2893 0.066092 103.583 0.240437 -33.12784 1400 0.602418 -153.992 3.547677 105.6808 0.075756 99.08275 0.283245 -36.62076 1500 0.587409 -158.21 3.338385 97.62961 0.076491 92.84421 0.326279 -40.68451 downloaded from: http:///
max2642/max2643 900mhz sige, high ip3,low-noise amplifiers 8 _______________________________________________________________________________________ table 2. max2642/max2643 typical scattering parameters (r bias = 806 , high-gain mode, v cc = +3.0v, t a = +25 c.) freq (mhz) s11 mag s11 phase (degrees) s21 mag s21 phase (degrees) s12 mag s12 phase (degrees) s22 mag s22 phase (degrees) 500 0.865705 -67.5629 1.788918 -115.899 0.009763 164.6001 0.880237 -73.81893 600 0.853946 -80.7084 2.926709 -132.446 0.021656 165.374 0.739354 -99.52715 700 0.820187 -94.1329 3.884537 -157.426 0.029766 148.5047 0.49107 -128.1454 800 0.775557 -104.428 4.237314 177.9528 0.036728 130.1148 0.216415 -153.3392 820 0.765138 -106.343 4.226094 173.3886 0.038253 129.5942 0.166772 -157.7809 840 0.759 -108.042 4.214913 169.298 0.038842 128.7876 0.121201 -160.7175 860 0.7495 -109.928 4.182436 165.3457 0.040084 127.3742 0.082263 -160.9349 880 0.741722 -111.683 4.134814 161.548 0.04118 127.2791 0.045314 -158.0615 900 0.736069 -113.369 4.085018 157.8688 0.04194 125.3719 0.016624 -133.0426 920 0.728957 -115.127 4.032105 154.6118 0.044642 123.3553 0.021369 -38.41852 940 0.724118 -116.951 3.965561 151.3371 0.044574 121.8034 0.043243 -17.90431 960 0.719676 -118.584 3.903364 148.3141 0.044792 120.7695 0.066898 -14.20027 980 0.714506 -120.313 3.83867 145.3527 0.045551 118.109 0.084163 -12.76007 1000 0.709103 -121.959 3.777 142.7001 0.046434 119.036 0.102269 -13.88384 1100 0.691292 -129.341 3.483283 131.8578 0.054775 114.7347 0.169693 -18.18657 1200 0.67035 -136.703 3.27255 121.9156 0.061407 108.2008 0.220689 -21.72272 1300 0.650556 -143.014 3.09574 113.1691 0.064829 103.5856 0.26965 -24.86245 1400 0.635363 -148.565 2.934971 105.3286 0.075142 97.9223 0.315264 -30.21604 1500 0.616202 -153.536 2.756155 96.43876 0.074664 92.88747 0.360706 -35.70454 downloaded from: http:///
max2642/max2643 900mhz sige, high ip3, low-noise amplifiers _______________________________________________________________________________________ 9 table 3. max2642/max2643 typical scattering parameters (r bias = 1.1k , high-gain mode, v cc = +3.0v, t a = +25 c.) freq (mhz) s11 mag s11 phase (degrees) s21 mag s11 phase (degrees) s12 mag s12 phase (degrees) s22 mag s22 phase (degrees) 500 0.878512 -66.0475 1.445864 -114.652 0.011049 175.9688 0.882121 -73.97408 600 0.86813 -79.0081 2.398259 -131.281 0.01977 166.0087 0.745577 -100.0799 700 0.834311 -91.9431 3.218232 -155.869 0.033312 149.3926 0.502282 -129.8978 800 0.793611 -102.384 3.544617 179.1002 0.038594 131.9641 0.223248 -160.5161 820 0.783644 -104.098 3.563583 174.4488 0.040112 131.6111 0.173175 -166.8809 840 0.774329 -105.921 3.546937 170.1934 0.038383 128.1902 0.126351 -173.2415 860 0.767016 -107.766 3.529998 165.871 0.04004 126.4807 0.086328 178.6352 880 0.762463 -109.461 3.500193 161.8438 0.041375 124.4402 0.049822 167.1237 900 0.753622 -111.254 3.463616 158.0655 0.043587 123.8527 0.020398 128.5957 920 0.748921 -113.148 3.419726 154.6982 0.043975 123.9237 0.024778 48.71712 940 0.743011 -114.988 3.36768 151.2749 0.045614 121.0385 0.04661 18.5372 960 0.737437 -116.709 3.309045 148.0373 0.044426 118.9012 0.070736 10.02515 980 0.733572 -118.379 3.261195 145.4087 0.046581 118.374 0.092621 4.197083 1000 0.729122 -119.87 3.203007 142.5148 0.048343 116.9249 0.110062 -0.293905 1100 0.710864 -127.286 2.970843 130.8328 0.055616 115.1579 0.183756 -10.46082 1200 0.688941 -134.781 2.789044 120.5809 0.061803 105.9973 0.238134 -16.81635 1300 0.668471 -141.275 2.637086 111.4044 0.065281 100.6171 0.289607 -21.34393 1400 0.655478 -146.685 2.491515 103.3737 0.073887 96.84646 0.335752 -27.6725 1500 0.638124 -152.12 2.352013 94.07729 0.077901 90.34502 0.381179 -33.81158 downloaded from: http:///
max2642/max2643 900mhz sige, high ip3,low-noise amplifiers 10 ______________________________________________________________________________________ table 4. max2642 typical scattering parameters (r bias = 510 , low-gain mode, v cc = +3.0v, t a = +25 c.) freq (mhz) s11 mag s11 phase (degrees) s21 mag s21 phase (degrees) s12 mag s12 phase (degrees) s22 mag s22 phase (degrees) 500 0.757279 -68.0641 0.186886 -175.019 0.032297 163.9787 0.87996 -73.8882 600 0.75734 -84.3042 0.715305 -146.702 0.066113 148.5775 0.71413 -98.6736 700 0.696969 -98.422 1.140352 -174.61 0.099941 124.8504 0.449346 -121.361 800 0.626874 -107.497 1.272844 157.4571 0.115242 103.1406 0.201112 -127.267 820 0.616023 -108.596 1.267541 152.644 0.116521 100.3007 0.165909 -123.451 840 0.608751 -109.794 1.258504 148.0772 0.117601 97.74948 0.137812 -116.955 860 0.600617 -110.754 1.242296 143.7583 0.119312 95.48379 0.118557 -107.057 880 0.596488 -111.776 1.22394 139.7228 0.122318 93.07481 0.106845 -93.617 900 0.593722 -112.739 1.203776 135.9799 0.124196 90.21815 0.103446 -81.5882 920 0.590101 -113.712 1.181885 132.3471 0.125203 86.9857 0.108109 -70.2192 940 0.588409 -114.834 1.156787 128.909 0.126462 84.27329 0.116508 -61.7886 960 0.589625 -115.806 1.129734 125.6671 0.127369 82.07469 0.129083 -55.1485 980 0.588079 -116.828 1.102653 122.5478 0.127952 80.98836 0.140436 -52.3827 1000 0.588646 -117.975 1.074686 119.9067 0.12743 79.48192 0.151608 -48.4917 1100 0.597562 -124.002 0.952505 108.5103 0.134236 72.42102 0.206216 -43.8143 1200 0.6066 -129.873 0.852237 99.7348 0.138354 65.08001 0.252003 -43.9084 1300 0.617079 -136.272 0.778154 92.06538 0.142609 58.40858 0.295689 -46.8967 1400 0.628195 -142.195 0.718399 85.7905 0.153771 52.64912 0.33692 -51.7496 1500 0.640304 -147.446 0.656535 78.77735 0.149518 46.71009 0.374046 -56.7658 downloaded from: http:///
max2642/max2643 900mhz sige, high ip3, low-noise amplifiers ______________________________________________________________________________________ 11 table 5. max2642 typical scattering parameters (r bias = 806 , low-gain mode, v cc = +3.0v, t a = +25 c.) freq (mhz) s11 mag s11 phase (degrees) s21 mag s21 phase (degrees) s12 mag s12 phase (degrees) s22 mag s22 phase (degrees) 500 0.800327 -67.1945 0.142134 -174.341 0.034805 161.583 0.88084 -73.57176 600 0.793203 -81.9096 0.543072 -143.848 0.067027 146.5234 0.719105 -99.08562 700 0.736656 -95.21 0.885917 -171.542 0.101665 122.4962 0.449898 -124.5513 800 0.676741 -103.586 1.005172 159.8524 0.114894 101.0446 0.183694 -136.0146 820 0.666567 -104.763 1.005053 154.9507 0.115809 97.08399 0.143872 -133.6185 840 0.660377 -106.009 0.998032 150.1753 0.118042 94.72314 0.109486 -125.307 860 0.651791 -107.125 0.990225 145.7345 0.118937 91.64486 0.085206 -112.6535 880 0.651106 -108.175 0.978178 141.4141 0.121575 89.19647 0.071836 -92.15154 900 0.643048 -109.302 0.961026 137.4554 0.120654 86.75212 0.0738 -70.16955 920 0.643064 -110.728 0.942776 133.7632 0.123645 83.74419 0.084769 -54.68721 940 0.641773 -111.842 0.923851 130.1361 0.123333 80.71953 0.098778 -46.62902 960 0.640079 -113.103 0.90238 126.9098 0.12394 78.64308 0.117484 -40.63098 980 0.641175 -114.555 0.879907 123.7699 0.123001 76.38534 0.132356 -38.28101 1000 0.641025 -115.739 0.857382 120.9598 0.122316 74.64619 0.145883 -35.93101 1100 0.647379 -121.754 0.760331 109.613 0.127968 68.72507 0.209937 -35.70716 1200 0.651053 -128.101 0.685309 100.4887 0.131962 62.04964 0.260554 -37.84105 1300 0.65637 -134.578 0.623917 93.1824 0.132337 56.01043 0.303628 -41.83445 1400 0.662035 -139.905 0.582929 86.98415 0.142149 51.5965 0.34549 -46.96146 1500 0.665418 -145.73 0.53929 79.50793 0.138295 45.87176 0.382116 -52.44192 downloaded from: http:///
max2642/max2643 900mhz sige, high ip3,low-noise amplifiers 12 ______________________________________________________________________________________ table 6. max2642 typical scattering parameters (r bias = 1.1 , low-gain mode, v cc = +3.0v, t a = +25 c.) freq (mhz) s11 mag s11 phase (degrees) s21 mag s21 phase (degrees) s12 mag s12 phase (degrees) s22 mag s22 phase (degrees) 500 0.822139 -66.5029 0.116321 -174.275 0.03386 162.1213 0.879442 -73.74798 600 0.808058 -80.314 0.439837 -143.103 0.065964 146.0581 0.724703 -99.6653 700 0.755255 -93.0574 0.72921 -170.915 0.0999 121.1126 0.457496 -126.0206 800 0.703243 -101.403 0.838753 160.4014 0.115609 98.56961 0.181063 -141.9359 820 0.694461 -102.693 0.839017 155.3972 0.116069 94.64113 0.138616 -140.7761 840 0.687512 -103.96 0.836295 150.551 0.117021 92.14834 0.098228 -136.1769 860 0.683106 -105.16 0.82921 145.8221 0.116949 88.49732 0.068493 -122.4536 880 0.678346 -106.424 0.818297 141.5384 0.119552 86.39616 0.049577 -93.92001 900 0.674815 -107.654 0.807407 137.4799 0.121372 83.98519 0.052964 -64.05054 920 0.672424 -109.092 0.791395 133.7297 0.122328 80.33097 0.070844 -44.45571 940 0.671111 -110.488 0.775375 129.9834 0.120584 78.46327 0.089595 -37.15094 960 0.669825 -111.738 0.757139 126.6652 0.120221 75.62165 0.110248 -31.16879 980 0.670457 -113.266 0.737655 123.3462 0.120881 73.65825 0.125584 -29.76813 1000 0.669392 -114.649 0.719178 120.6109 0.11967 71.31908 0.14489 -28.6178 1100 0.674741 -120.914 0.638029 109.1083 0.123318 66.28802 0.21152 -30.89364 1200 0.675283 -127.763 0.575544 100.3768 0.125601 58.42145 0.264377 -34.10688 1300 0.679379 -134.523 0.52948 92.75184 0.126691 54.07481 0.308252 -38.78385 1400 0.682813 -139.869 0.494615 86.94255 0.133067 49.83734 0.348366 -44.59462 1500 0.681251 -145.854 0.462984 79.4068 0.128294 43.41453 0.386044 -50.022 downloaded from: http:///
max2642/max2643 900mhz sige, high ip3, low-noise amplifiers ______________________________________________________________________________________ 13 table 7. max2642/max2643 typical noise parameters (r bias = 510 , high-gain mode, v cc = +3.0v, t a = +25 c.) frequency (mhz) nf min (db) opt mag opt phase (degrees) r n ( ) 800 1.011 0.3074 55.04 13.11 850 1.023 0.3016 58.89 13.28 875 1.030 0.2990 60.83 13.38 900 1.037 0.2965 62.77 13.49 925 1.045 0.2942 64.70 13.60 950 1.053 0.2919 66.62 13.72 1000 1.069 0.2879 70.40 13.96 table 8. max2642/max2643 typical noise parameters (r bias = 806 , high-gain mode, v cc = +3.0v, t a = +25 c.) frequency (mhz) nf min (db) opt mag opt phase (degrees) r n ( ) 800 1.149 0.3905 54.95 15.14 850 1.161 0.3832 58.63 15.32 875 1.168 0.3798 60.49 15.43 900 1.176 0.3766 62.35 15.55 925 1.185 0.3735 64.21 15.68 950 1.194 0.3705 66.06 15.82 1000 1.213 0.3650 69.72 16.11 table 9. max2642/max2643 typical noise parameters (r bias = 1.1k , high-gain mode, v cc = +3.0v, t a = +25 c.) frequency (mhz) nf min (db) opt mag opt phase (degrees) r n ( ) 800 1.312 0.4473 55.50 17.64 850 1.325 0.4391 59.12 17.83 875 1.333 0.4353 60.96 17.96 900 1.342 0.4317 62.79 18.11 925 1.352 0.4282 64.63 18.26 950 1.363 0.4249 66.46 18.43 1000 1.385 0.4186 70.08 18.78 downloaded from: http:///
max2642/max2643 900mhz sige, high ip3,low-noise amplifiers 14 ______________________________________________________________________________________ table 10. gain selection and shutdownmodes part control voltage = v cc control voltage = 0 max2642 low gain high gain max2643 enabled shutdown max2642 bias r bias r bias (a) max2642 bias (b) figure 1. max2642 recommended shutdown configurations chip information transistor count: 158 downloaded from: http:///
max2642/max2643 900mhz sige, high ip3, low-noise amplifiers ______________________________________________________________________________________ 15 package information sc70, 6l.eps downloaded from: http:///
max2642/max2643 900mhz sige, high ip3,low-noise amplifiers 16 ______________________________________________________________________________________ notes downloaded from: http:///

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