19-1682; Rev 0; 4/00 UAL IT MAN TION K A ET U E L H A S EV TA WS DA FOLLO 900MHz SiGe, High IP3, Low-Noise Amplifiers 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 Ordering Information ________________________Applications 800MHz/900MHz Cellular Phones PART TEMP. RANGE PINPACKAGE TOP MARK MAX2642EXT-T -40°C to +85°C 6 SC70-6 AAC MAX2643EXT-T -40°C to +85°C 6 SC70-6 AAD 900MHz Cordless Phones 868MHz/900MHz ISM-Band Wireless Data PMR/SMR/LMR Typical Operating Circuit Pin Configuration VCC 47pF MAX2642 MAX2643 VCC RBIAS 510Ω TOP VIEW LOW GAIN (ENABLE) BIAS 1 BIAS BIAS HIGH GAIN (SHUTDOWN) GND 2 RF INPUT L1 8.7nH MAX2642 MAX2643 6 RFOUT 5 GND 4 VCC 33k (10k) RFIN RFOUT C1 3.3pF RF OUTPUT RFIN 3 SC70-6 GND ( ) ARE FOR MAX2643. ________________________________________________________________ Maxim Integrated Products 1 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. MAX2642/MAX2643 General Description The MAX2642/MAX2643 low-cost, high third-order intercept 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’s dynamic range. Both devices feature a shutdown mode that minimizes power consumption. On-chip output matching saves board space by reducing the number of external components. The MAX2642/MAX2643 are designed on a low-noise, advanced silicon-germanium (SiGe) process technology. They operate from a +2.7V to +5.5V single supply and are available in the ultra-small 6-pin SC70 package. MAX2642/MAX2643 900MHz SiGe, High IP3, Low-Noise Amplifiers ABSOLUTE MAXIMUM RATINGS VCC to GND ..............................................................-0.3V to +6V RFOUT to GND...........................................-0.3V to (VCC + 0.3V) RFIN to GND ..................................................................0 to 0.9V RFIN Power (50Ω source) ................................................+5dBm BIAS to GND ................................................................0 to +0.3V Operating Temperature Range ...........................-40°C to +85°C Maximum Junction Temperature .....................................+150°C Continuous Power Dissipation (TA = +70°C) SC70-6 (derate 3.1mW/°C above +70°C) ...................245mW Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Stresses beyond those listed under “Absolute 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. DC ELECTRICAL CHARACTERISTICS—MAX2642 (VCC = +2.7V to +5.5V, TA = -40°C to +85°C, no RF signal applied, RFIN and RFOUT are AC-coupled and terminated to 50Ω, highgain mode. Typical values are at VCC = 3.0V, TA = +25°C, unless otherwise noted.) (Notes 1, 2, 3) PARAMETER Supply Voltage CONDITIONS MIN 2.7 High-gain mode, R BIAS = 510Ω, TA = +25°C TYP 5.3 RBIAS = 510Ω, TA = -40°C to +85°C Operating Supply Current Shutdown Supply Current Gain Control Voltage Input Gain Control Input Current MAX 5.5 6.7 UNITS V 7.5 RBIAS = 806Ω 3.6 RBIAS = 1.1kΩ 2.8 Low-gain mode, R BIAS = 510Ω, TA = 25°C 5.9 BIAS = unconnected (see Applications Information) 0.2 High-gain mode (Note 4) mA mA 0.6 Low-gain mode (Note 5) 2.0 High-gain mode (Note 6) -10 0 Low-gain mode (Note 7) 0 50 V µA DC ELECTRICAL CHARACTERISTICS—MAX2643 (VCC = +2.7V to +5.5V, TA = -40°C to +85°C, no RF signal applied, RFIN and RFOUT are AC-coupled and terminated to 50Ω. Typical values are at VCC = 3.0V, TA = +25°C, unless otherwise noted.) (Notes 1, 8, 9) PARAMETER Supply Voltage CONDITIONS MIN 2.7 RBIAS = 510Ω, TA = +25°C Operating Supply Current Shutdown Supply Current Shutdown Control Input Voltage Shutdown Control Input Current 2 TYP 5.1 RBIAS = 510Ω, TA = -40°C to +85°C 7.3 RBIAS = 806Ω 3.4 RBIAS = 1.1kΩ 2.6 Shutdown mode (see Applications Information) Normal operation (Note 10) Shutdown mode (Note 11) Normal operation (Note 7) Shutdown mode (Note 6) MAX 5.5 6.5 0.2 10 2.0 0 -5 _______________________________________________________________________________________ 0.6 10 5 UNITS V mA µA V µA 900MHz SiGe, High IP3, Low-Noise Amplifiers (MAX2642/MAX2643 EV kits, PRFIN = -30dBm, fRFIN = 900MHz, input and output are terminated to 50Ω, VCC = +3.0V, TA = +25°C, RBIAS = 510Ω, unless otherwise noted.) (Note 12) PARAMETER Operating Frequency Range Gain (Note 14) (Note 13) TA = +25°C Gain Variation Over Temperature TA = -40°C to +85°C Attenuation Step MAX2642 only 13 RBIAS = 510Ω 0 Input Third-Order Intercept Point (Note 15) Input 1dB Compression Point Noise Figure (Note 16) Input Return Loss CONDITIONS Shutdown Response Time Note 2: Note 3: Note 4: Note 5: Note 6: Note 7: Note 8: Note 9: Note 10: Note 11: Note 12: Note 13: Note 14: Note 15: Note 16: ±0.35 ±0.75 dB -5 dB dBm -18 MAX2642, low-gain mode MAX2642, low-gain mode MAX2642 MAX2643 dBm -17 1.35 MAX2642, through series switch at BIAS Note 1: UNITS MHz dB -10 MAX2642, low-gain mode Gain-Step Response Time 16.7 MAX 1000 19 RBIAS = 806Ω MAX2642, low-gain mode Reverse Isolation TYP RBIAS = 1.1kΩ MAX2642, low-gain mode Output Return Loss MIN 800 14.5 1.6 4.3 -10 -12 -10 -18 -10 -14 -10 -11 -20 -26 -10 -17 dB dB dB dB 5 10 µs 6 10 µs 12 Devices are production tested at TA = +25°C. Minimum and maximum values are guaranteed by design and characterization over temperature and supply voltage. High-gain mode is set for the MAX2642 by connecting RFOUT to GND through a 33kΩ resistor. Low-gain mode is applicable only to the MAX2642 and is set by connecting RFOUT to VCC through a 33kΩ resistor. Maximum DC voltage through a 33kΩ resistor that sets the MAX2642 to operate in high-gain mode. Minimum DC voltage through a 33kΩ resistor that sets the MAX2642 to operate in low-gain mode. DC current required when RFOUT is connected to GND through a 33kΩ resistor (MAX2642) and 10kΩ resistor (MAX2643). DC current required when RFOUT is connected to VCC through a 33kΩ resistor (MAX2642) and 10kΩ resistor (MAX2643). Normal operation is set for the MAX2643 by connecting RFOUT to VCC through a 10kΩ resistor. Shutdown is set for the MAX2643 by connecting RFOUT to GND through a 10kΩ resistor. Minimum DC voltage through a 10kΩ resistor that sets the MAX2643 to operate in normal mode. Maximum DC voltage through a 10kΩ resistor that sets the MAX2643 to operate in shutdown mode. Min/Max limits are guaranteed by design and characterization, except gain is production tested at TA = +25°C. The part has been characterized at the specified frequency range. Operation outside this range is possible but not guaranteed. Devices are production tested at TA = +25°C. Measured with two input tones, f1 = 895MHz and f2 = 905MHz, both at -30dBm per tone. Excludes PC board losses (0.25dB typical at the input of the MAX2642/MAX2643 EV kit). _______________________________________________________________________________________ 3 MAX2642/MAX2643 AC ELECTRICAL CHARACTERISTICS Typical Operating Characteristics (MAX2642/MAX2643 EV kits, VCC = +3.0V, PRFIN = -30dBm, input and output are terminated to 50Ω, fRFIN = 900MHz, RBIAS = 510Ω, high-gain mode (low-gain mode is applicable only to the MAX2642), TA = +25°C, unless otherwise noted.) MAX2642 INPUT THIRD-ORDER INTERCEPT vs. RBIAS (LOW GAIN) TA = +85°C -5 -7 -9 -11 TA = -40°C TA = +25°C -13 -15 TA = +85°C 200 400 600 800 1000 1200 1400 1600 1800 TA = -40°C 500 1500 800 820 840 860 880 900 920 940 960 980 1000 2000 FREQUENCY (MHz) OUTPUT POWER vs. INPUT POWER TA = +85°C, LOW GAIN -10 TA = +25°C, LOW GAIN -12 0 TA = -40°C, LOW GAIN -16 -18 HIGH GAIN -22 0 -24 20 40 60 80 0 100 MAX2642/43-07 TA = +85°C, HIGH GAIN TA = +25°C, LOW GAIN TA = -40°C, LOW GAIN 2 0 TA = +85°C, LOW GAIN -2 -4 200 400 600 800 1000 1200 1400 1600 1800 RBIAS(Ω) 18 -14 -10 -6 -2 MATCHED AT 900MHz 16 2 HIGH-GAIN MODE 14 TA = -40°C, LOW GAIN 12 10 8 6 4 TA = +85°C, LOW GAIN 0 -2 LOW-GAIN MODE 2 0 -4 0 -18 GAIN vs. FREQUENCY TA = +25°C, LOW GAIN 4 2 -22 20 TA = +25°C, HIGH GAIN TA = +85°C, HIGH GAIN 10 8 6 -26 PIN (dBm) TA = -40°C, HIGH GAIN 14 12 GAIN (dB) 12 10 8 6 4 -30 GAIN vs. SUPPLY VOLTAGE TA = +25°C, HIGH GAIN 510Ω, LOW GAIN -28 20 18 16 1.1kΩ, LOW GAIN 806Ω, LOW GAIN -24 TA = +25°C, HIGH GAIN RBIAS (Ω) GAIN vs. RBIAS TA = -40°C, HIGH GAIN -8 -12 200 400 600 800 1000 1200 1400 1600 1800 TEMPERATURE (°C) 20 18 16 14 -4 -20 GAIN (dB) 0 TA = -40°C, HIGH GAIN MAX2642/43-08 -20 1.1kΩ, HIGH GAIN -16 -20 1 806Ω, HIGH GAIN 4 TA = +85°C, HIGH GAIN -14 510Ω, HIGH GAIN 8 POUT (dBm) 3 12 MAX2642/43-05 MAX2642/43-04 4 -40 HIGH GAIN P1dB vs. RBIAS P1dB (dBm) NOISE FIGURE (dB) 1000 RBIAS (Ω) -8 LOW GAIN 2 2 0 0 NOISE FIGURE vs. TEMPERATURE 5 3 TA = +25°C RBIAS (Ω) 6 LOW GAIN 4 1 -15 0 4 5 MAX2642/43-06 -3 INPUT IP3 (dBm) INPUT IP3 (dBm) -1 MATCHED AT 900MHz MAX2642/43-09 1 NOISE FIGURE vs. FREQUENCY 6 NOISE FIGURE (dB) 3 11 9 7 5 3 1 -1 -3 -5 -7 -9 -11 -13 MAX2642/43-02 MAX2642/43-01 5 MAX2642/43-03 INPUT THIRD-ORDER INTERCEPT vs. RBIAS (HIGH GAIN) GAIN (dB) MAX2642/MAX2643 900MHz SiGe, High IP3, Low-Noise Amplifiers 2.4 2.8 3.2 3.6 4.0 VCC (V) 4.4 4.8 5.2 5.6 800 820 840 860 880 900 920 940 960 980 1000 FREQUENCY (MHz) _______________________________________________________________________________________ 900MHz SiGe, High IP3, Low-Noise Amplifiers 13.2 13.0 12.8 12.6 -15 OUTPUT -20 OUTPUT -10 -15 INPUT -20 -25 -25 -30 -30 -35 -35 800 820 840 860 880 900 920 940 960 980 1000 800 820 840 860 880 900 920 940 960 980 1000 800 820 840 860 880 900 920 940 960 980 1000 FREQUENCY (MHz) FREQUENCY (MHz) FREQUENCY (MHz) REVERSE ISOLATION vs. FREQUENCY MAX2642 HIGH/LOW-GAIN SWITCH CHARACTERISTICS MAX2643 SHUTDOWN CHARACTERISTICS -10 LOW GAIN -15 -20 HIGH GAIN -25 -10 -20 -30 3V -40 0V VRFOUT -20 -30 -40 -50 -60 VRFOUT -70 -50 -30 MAX2642/43-15 0 -10 OUTPUT POWER (dBm) -5 OUTPUT POWER (dBm) MATCHED AT 900MHz MAX2642/43-14 0 MAX2642/43-13 0 RETURN LOSS (dB) INPUT -10 MATCHED AT 900MHz -5 RETURN LOSS (dB) 13.4 MATCHED AT 900MHz -5 ATTENUATION STEP (dB) 13.6 0 MAX2642/43-11 MATCHED AT 900MHz 13.8 ATTENUATION STEP (dB) 0 MAX2642/43-10 14.0 MAX2642 RETURN LOSS vs. FREQUENCY (LOW GAIN) RETURN LOSS vs. FREQUENCY (HIGH GAIN) MAX2642/43-12 MAX2642 ATTENUATION STEP vs. FREQUENCY 3V 0V -80 -90 -60 -35 TIME (400ns/div) TIME (4µs/div) SHUTDOWN CURRENT vs. TEMPERATURE SUPPLY CURRENT vs. SUPPLY VOLTAGE FREQUENCY (MHz) TA = +25°C, LOW GAIN 10 TA = +25°C, HIGH GAIN 8 TA = -40°C, LOW GAIN 6 4 MAX2642/43-17 TA = +85°C, HIGH GAIN 12 VCC = 5.5V 1 0.1 0.01 VCC = 3.0V TA = -40°C, HIGH GAIN 0 200 400 600 800 1000 1200 1400 1600 RBIAS (Ω) 7.2 TA = +25°C, LOW GAIN TA = +85°C, HIGH GAIN 6.8 6.4 6.0 TA = +25°C, HIGH GAIN 5.6 5.2 TA = -40°C, HIGH GAIN TA = -40°C, LOW GAIN 4.4 0.0001 0 TA = +85°C, LOW GAIN 7.6 4.8 0.001 2 8.0 SUPPLY VOLTAGE (mA) SUPPLY CURRENT (mA) 14 10 SHUTDOWN CURRENT (µA) TA = +85°C, LOW GAIN MAX2642/43-16 SUPPLY CURRENT vs. RBIAS 16 MAX2642/43-18 800 820 840 860 880 900 920 940 960 980 1000 4.0 -40 -20 0 20 40 60 TEMPERATURE (°C) 80 100 2.4 2.8 3.2 3.6 4.0 4.4 4.8 5.2 5.6 SUPPLY VOLTAGE (V) _______________________________________________________________________________________ 5 MAX2642/MAX2643 Typical Operating Characteristics (continued) (MAX2642/MAX2643 EV kits, VCC = +3.0V, PRFIN = -30dBm, input and output are terminated to 50Ω, fRFIN = 900MHz, RBIAS = 510Ω, high-gain mode (low-gain mode is applicable only to the MAX2642), TA = +25°C, unless otherwise noted.) 900MHz SiGe, High IP3, Low-Noise Amplifiers MAX2642/MAX2643 Pin Description PIN NAME FUNCTION 1 BIAS Resistor Bias Control. Connect a resistor, RBIAS, from BIAS to ground. RBIAS sets IP3 and supply current (see Applications Information). The current through this pin is approximately 50mV divided by RBIAS. 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 is required for optimum performance. 4 VCC Supply Voltage. Bypass with a 47pF capacitor directly to ground at the supply pin. Additional bypassing may be necessary for long VCC lines. 6 RFOUT Amplifier Output. Internally matched to 50Ω. 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 transmission line. The Typical Operating Circuit shows the recommended 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 network 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 at RFOUT through a 33kΩ resistor is less than +0.6V, the device is in high-gain mode; if the DC voltage is greater than +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. 6 Shutdown For the MAX2643, the recommended shutdown method is 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 is shut 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 any RF/microwave circuit. Use controlled impedance lines on all high-frequency inputs and outputs. Bypass with decoupling capacitors located close to the device VCC pin. For long VCC lines, it may be necessary to add additional decoupling capacitors. These additional capacitors can be located farther away from the device package. Proper grounding of the GND pins is essential. 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. _______________________________________________________________________________________ 900MHz SiGe, High IP3, Low-Noise Amplifiers (RBIAS = 510Ω, high-gain mode, VCC = +3.0V, TA = +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 600 0.825168 -83.7622 2.390806 -119.18 0.010763 166.6047 0.878515 -74.01422 3.836967 -136.451 0.019608 167.8741 0.731997 -98.95091 700 0.785389 -97.3356 4.983279 -161.126 0.02988 800 0.73798 -108.682 5.320575 174.5337 0.036197 148.5203 0.481344 -125.1027 134.8794 0.215462 820 0.728099 -110.578 5.286 170.3323 0.037193 -142.0387 132.505 0.171633 -141.9486 840 0.718704 -112.499 5.241719 166.3987 860 0.711335 -114.276 5.185213 162.4763 0.037266 129.1671 0.135415 -139.9869 0.039143 128.0447 0.100779 880 0.705742 -115.973 5.118265 -133.8375 158.9238 0.039563 128.4158 0.076864 -121.3533 900 0.699509 -117.585 920 0.695913 -119.117 5.050356 155.6292 0.042586 128.075 0.062918 -102.3972 4.973824 152.4338 0.041805 126.9362 0.06007 -81.32555 940 0.690406 960 0.68522 -120.995 4.897571 149.4286 0.04301 122.9564 0.065287 -62.51575 -122.642 4.826106 146.6999 0.046528 122.0997 0.077374 980 -50.8638 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 _______________________________________________________________________________________ 7 MAX2642/MAX2643 Table 1. MAX2642/MAX2643 Typical Scattering Parameters MAX2642/MAX2643 900MHz SiGe, High IP3, Low-Noise Amplifiers Table 2. MAX2642/MAX2643 Typical Scattering Parameters (RBIAS = 806Ω, high-gain mode, VCC = +3.0V, TA = +25°C.) 8 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 -12.76007 980 0.714506 -120.313 3.83867 145.3527 0.045551 118.109 0.084163 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 _______________________________________________________________________________________ 900MHz SiGe, High IP3, Low-Noise Amplifiers (RBIAS = 1.1kΩ, high-gain mode, VCC = +3.0V, TA = +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 _______________________________________________________________________________________ 9 MAX2642/MAX2643 Table 3. MAX2642/MAX2643 Typical Scattering Parameters MAX2642/MAX2643 900MHz SiGe, High IP3, Low-Noise Amplifiers Table 4. MAX2642 Typical Scattering Parameters (RBIAS = 510Ω, low-gain mode, VCC = +3.0V, TA = +25°C.) 10 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 ______________________________________________________________________________________ 900MHz SiGe, High IP3, Low-Noise Amplifiers (RBIAS = 806Ω, low-gain mode, VCC = +3.0V, TA = +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 600 0.793203 -81.9096 0.543072 -143.848 0.067027 161.583 0.88084 -73.57176 146.5234 0.719105 -99.08562 700 0.736656 -95.21 0.885917 -171.542 0.101665 800 0.676741 -103.586 1.005172 159.8524 0.114894 122.4962 0.449898 -124.5513 101.0446 0.183694 820 0.666567 -104.763 1.005053 154.9507 0.115809 -136.0146 97.08399 0.143872 -133.6185 840 0.660377 -106.009 0.998032 150.1753 860 0.651791 -107.125 0.990225 145.7345 0.118042 94.72314 0.109486 -125.307 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 -109.302 920 0.643064 -110.728 0.961026 137.4554 0.120654 86.75212 0.0738 -70.16955 0.942776 133.7632 0.123645 83.74419 0.084769 940 0.641773 -111.842 -54.68721 0.923851 130.1361 0.123333 80.71953 0.098778 -46.62902 960 0.640079 -113.103 0.90238 126.9098 0.12394 980 0.641175 -114.555 0.879907 123.7699 0.123001 78.64308 0.117484 -40.63098 76.38534 0.132356 1000 0.641025 -115.739 0.857382 120.9598 0.122316 74.64619 -38.28101 0.145883 -35.93101 1100 0.647379 -121.754 0.760331 109.613 0.127968 1200 0.651053 -128.101 0.685309 100.4887 0.131962 68.72507 0.209937 -35.70716 62.04964 0.260554 -37.84105 1300 0.65637 -134.578 0.623917 93.1824 0.132337 1400 0.662035 -139.905 0.582929 86.98415 0.142149 56.01043 0.303628 -41.83445 51.5965 0.34549 1500 0.665418 -145.73 0.53929 79.50793 0.138295 -46.96146 45.87176 0.382116 -52.44192 ______________________________________________________________________________________ 11 MAX2642/MAX2643 Table 5. MAX2642 Typical Scattering Parameters MAX2642/MAX2643 900MHz SiGe, High IP3, Low-Noise Amplifiers Table 6. MAX2642 Typical Scattering Parameters (RBIAS = 1.1Ω, low-gain mode, VCC = +3.0V, TA = +25°C.) 12 FREQ (MHz) S11 MAG S11 PHASE (DEGREES) S21 MAG S21 PHASE (DEGREES) S22 MAG S22 PHASE (DEGREES) 500 0.822139 -66.5029 0.116321 -174.275 0.03386 600 0.808058 -80.314 0.439837 -143.103 0.065964 162.1213 0.879442 -73.74798 146.0581 0.724703 -99.6653 700 0.755255 -93.0574 0.72921 -170.915 0.0999 800 0.703243 -101.403 0.838753 160.4014 0.115609 121.1126 0.457496 -126.0206 98.56961 0.181063 820 0.694461 -102.693 0.839017 155.3972 0.116069 94.64113 -141.9359 0.138616 -140.7761 840 0.687512 -103.96 0.836295 150.551 0.117021 860 0.683106 -105.16 0.82921 145.8221 0.116949 92.14834 0.098228 -136.1769 88.49732 0.068493 880 0.678346 -106.424 0.818297 141.5384 0.119552 -122.4536 86.39616 0.049577 -93.92001 900 0.674815 -107.654 0.807407 137.4799 920 0.672424 -109.092 0.791395 133.7297 0.121372 83.98519 0.052964 -64.05054 0.122328 80.33097 0.070844 940 0.671111 -110.488 0.775375 -44.45571 129.9834 0.120584 78.46327 0.089595 -37.15094 960 0.669825 -111.738 980 0.670457 -113.266 0.757139 126.6652 0.120221 75.62165 0.110248 -31.16879 0.737655 123.3462 0.120881 73.65825 0.125584 -29.76813 1000 0.669392 1100 0.674741 -114.649 0.719178 120.6109 0.11967 71.31908 0.14489 -28.6178 -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 S12 MAG S12 PHASE (DEGREES) ______________________________________________________________________________________ 900MHz SiGe, High IP3, Low-Noise Amplifiers MAX2642/MAX2643 Table 7. MAX2642/MAX2643 Typical Noise Parameters (RBIAS = 510Ω, high-gain mode, VCC = +3.0V, TA = +25°C.) FREQUENCY (MHz) NFMIN (dB) Γopt MAG Γopt PHASE (DEGREES) RN (Ω) 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 (RBIAS = 806Ω, high-gain mode, VCC = +3.0V, TA = +25°C.) FREQUENCY (MHz) NFMIN (dB) Γopt MAG Γopt PHASE (DEGREES) RN (Ω) 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 (RBIAS = 1.1kΩ, high-gain mode, VCC = +3.0V, TA = +25°C.) FREQUENCY (MHz) NFMIN (dB) Γopt MAG Γopt PHASE (DEGREES) RN (Ω) 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 ______________________________________________________________________________________ 13 MAX2642/MAX2643 900MHz SiGe, High IP3, Low-Noise Amplifiers Table 10. Gain Selection and Shutdown Modes BIAS RBIAS BIAS MAX2642 RBIAS CONTROL VOLTAGE = VCC CONTROL VOLTAGE = 0 MAX2642 Low Gain High Gain MAX2643 Enabled Shutdown PART MAX2642 Chip Information TRANSISTOR COUNT: 158 (A) (B) Figure 1. MAX2642 Recommended Shutdown Configurations 14 ______________________________________________________________________________________ 900MHz SiGe, High IP3, Low-Noise Amplifiers SC70, 6L.EPS ______________________________________________________________________________________ 15 MAX2642/MAX2643 Package Information MAX2642/MAX2643 900MHz SiGe, High IP3, Low-Noise Amplifiers NOTES 16 ______________________________________________________________________________________