19-1872; Rev 1; 4/02 KIT ATION EVALU LE B A IL A AV 1575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers Features ♦ Low Noise Figure MAX2654: 1.5dB at 1575MHz MAX2655: 1.45dB at 1575MHz MAX2656: 1.9dB at 1960MHz The MAX2654 operates in the GPS frequency of 1575MHz with 15.1dB of gain, 1.5dB noise figure, and only consumes 5.8mA. The MAX2655 is designed with high-input IP3 to improve operation in cellular applications where the cellular power amplifier leaks into the GPS receiver. The MAX2656 is designed for PCS phone applications with 13.5dB of gain in high-gain mode and 0.8dB of gain in low-gain mode (selected by a logic control) and 1.9dB noise figure. The IP3 of MAX2655/MAX2656 is adjustable by a single external bias resistor (RBIAS), allowing supply current to be optimized for a specific application. ♦ 12.7dB Gain Step (MAX2656 only) ♦ High Gain MAX2654: 15.1dB at 1575MHz MAX2655: 14.1dB at 1575MHz MAX2656: 13.5dB at 1960MHz ♦ Integrated 50Ω Output Matching ♦ Variable IP3 Set by One Bias Resistor (MAX2655/MAX2656 only) ♦ 0.1µA Shutdown Mode (MAX2654/MAX2655 only) ♦ +2.7V to +5.5V Single-Supply Operation ♦ Ultra-Small 6-Pin SC70 Package Ordering Information The MAX2654/MAX2655/MAX2656 operate from a +2.7V to +5.5V single supply and are available in the miniature 6-pin SC70 package. PART TEMP RANGE ________________________Applications MAX2654EXT-T -40°C to +85°C 6 SC70-6 AAJ AAK GPS Receivers MAX2655EXT-T -40°C to +85°C 6 SC70-6 GPS Receivers in Cellular Phones MAX2656EXT-T -40°C to +95°C 6 SC70-6 DCS/PCS Cellular Phones Wireless Local Loop VCC = +3V Pin Configuration 1 GND 2 AAI Typical Operating Circuit Satellite Phones BIAS (GND) SOT TOPMARK PINPACKAGE 6 RFOUT 5 GND Cb 4 MAX2655 MAX2656 1 VCTRL/GND BIAS RBIAS RFIN MAX2654 MAX2655 MAX2654 3 4 SC70-6 ARE FOR MAX2654 ONLY 10kΩ L1 RFIN VCC C1 6 RFOUT 3 C2 (1) 2 5 ( ) ARE FOR MAX2654 ONLY PART FREQUENCY L1 (nH) C1 (pF) MAX2654 1575 5.6 6 C2 (pF) 1.6 MAX2655 1575 5.6 1800 1.5 MAX2656 1960 4.7 1800 1.2 ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX2654/MAX2655/MAX2656 General Description The MAX2654/MAX2655/MAX2656 high third-order intercept point (IP3), low-noise amplifiers (LNAs) are designed for applications in GPS, PCS, WLL, and satellite phone systems. The MAX2654/MAX2655/MAX2656 incorporate on-chip internal output matching to 50Ω, eliminating the need for external matching components. A shutdown feature in the MAX2654/MAX2655 reduces the operating current to 0.1µA, eliminating the need for an external supply switch. MAX2654/MAX2655/MAX2656 1575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers ABSOLUTE MAXIMUM RATINGS VCC to GND .............................................................-0.3V to +6V RF Input Power .................................................................+5dBm Continuous Power Dissipation (TA = +70°C) 6-Pin SC70 (derate 3.1mW/°C above +70°C) ..............245mW Operating Temperature Range ...........................-40°C to +85°C Maximum Junction Temperature .....................................+150°C Storage Temperature.........................................-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 (VCC = +2.7V to +5.5V, RBIAS = 511Ω ±1%, TA = -40°C to +85°C. No RF signal applied. RFIN is AC-coupled and terminated to 50Ω. RFOUT is unconnected. Typical values are at VCC = +3V, TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER CONDITIONS Supply Voltage Operating Supply Current (MAX2654 only) VRFOUT = VCC VRFOUT = VCC TA = +25°C VRFOUT = GND Operating Supply Current (MAX2656 only) VRFOUT = GND TA = +25°C VRFOUT = VCC 2 TYP 2.7 VRFOUT = GND Operating Supply Current (MAX2655 only) MIN TA = +25°C 5.8 TA = -40°C to +85°C MAX UNIT 5.5 V 8.2 9.2 TA = +25°C 0.1 TA = -40°C to +85°C 1 2.1 RBIAS = 511Ω ±1% 8.3 RBIAS = 698Ω ±1% 5.9 RBIAS = 357Ω ±1% 10.1 RBIAS = 511Ω ±1%, TA = -40°C to +85°C mA µA 10 mA 11.1 TA = +25°C 0.1 TA = -40°C to +85°C 1 2.2 RBIAS = 511Ω ±1% 11.5 RBIAS = 715Ω ±1% 8.5 RBIAS = 511Ω ±1%, TA = +85°C 13.6 TA = +25°C 12.3 TA = +85°C 14.6 15.2 mA mA Input Logic High at VRFOUT (Note 2) Input Logic Low at VRFOUT (Note 3) 2 0.6 Input Logic High Current at VRFOUT (Note 4) MAX2654/MAX2655 15.6 Input Logic Low Current at VRFOUT (Note 5) MAX2654/MAX2655 MAX2656 MAX2656 _______________________________________________________________________________________ µA V 71 1 -24 V µA µA 1575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers (MAX2654 Evaluation Kit, VCC = +3.0V, PIN = -30dBm, fIN = 1575MHz, VRFOUT = VCC through a 10kΩ resistor, TA = +25°C. Typical values are at VCC = +3V, TA = +25°C, unless otherwise noted.) (Note 6) PARAMETER CONDITIONS Operating Frequency Range (Note 7) MIN TYP 1400 Gain (Note 8) 12.7 Gain Variation Over Temperature TA = -40°C to +85°C MAX UNIT 1700 MHz 15.1 0.15 dB 1 dB Input Third-Order Intercept Point (Note 9) -7.2 dBm Input 1dB Compression Point -18 dBm Noise Figure (Note 10) 1.5 Input Return Loss 9.7 dB Output Return Loss 8.4 dB Reverse Isolation 30 dB 1.8 dB AC ELECTRICAL CHARACTERISTICS (MAX2655) (MAX2655 Evaluation Kit, VCC = +3.0V, PIN = -30dBm, fIN = 1575MHz, VRFOUT = VCC through a 10kΩ resistor, RBIAS = 511Ω ±1%, TA = +25°C. Typical values are at VCC = +3V, TA = +25°C, unless otherwise noted.) (Note 6) PARAMETER CONDITIONS Operating Frequency Range (Note 7) MIN TYP 1400 Gain (Note 8) Gain Variation Over Temperature TA = -40°C to +85°C 0.6 RBIAS = 511Ω ±1% 2.8 RBIAS = 698Ω ±1% 2.2 RBIAS = 357Ω ±1% 3.8 Input Third-Order Intercept Point (Note 9) 12 MAX UNIT 1700 MHz 1.1 dB 14.1 dB dBm Input 1dB Compression Point -12.2 Noise Figure (Note 10) 1.45 Input Return Loss 16.1 Output Return Loss 15.5 dB 32 dB Reverse Isolation dBm 1.9 dB dB _______________________________________________________________________________________ 3 MAX2654/MAX2655/MAX2656 AC ELECTRICAL CHARACTERISTICS (MAX2654) MAX2654/MAX2655/MAX2656 1575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers AC ELECTRICAL CHARACTERISTICS (MAX2656) (MAX2656 Evaluation Kit, VCC = +3V, PIN = -30dBm, fIN = 1960MHz, VRFOUT = GND through a 12kΩ resistor, RBIAS = 511Ω ±1%, TA = +25°C. Typical values are at VCC = +3V, TA = +25°C, unless otherwise noted.) (Note 6) PARAMETER CONDITIONS Operating Frequency Range (Note 7) Gain, High-Gain Mode MIN TYP 1800 (Note 11) 12 (Note 12) 0.8 Gain Variation Over Temperature TA = -40°C to +85°C 0.3 Input Third-Order Intercept Point (Note 13) Input 1dB Compression Point Noise Figure (Note 10) Input Return Loss Output Return Loss Reverse Isolation Gain Step Response Time UNIT 2000 MHz 13.5 Gain, Low-Gain Mode Gain Step MAX dB dB 1.2 12.7 RBIAS = 511Ω ± 1% dB dB 1.5 RBIAS = 715Ω ± 1% -3 Low-gain mode (Note 12) 7.2 High-gain mode (Note 11) -7 Low-gain mode (Note 12) -1.2 High-gain mode (Note 11) 1.9 Low-gain mode (Note 12) 10.8 High-gain mode (Note 11) 14.4 Low-gain mode (Note 12) 19.3 High-gain mode (Note 11) 10.7 Low-gain mode (Note 12) 7.3 High-gain mode (Note 11) 28 Low-gain mode (Note 12) 25 3.2 dBm dBm 2.4 dB dB dB dB µs Note 1: Devices are production tested at TA = +25°C. Minimum and maximum values are guaranteed by design and characterization over temperature and supply voltages to ±6 sigma. Note 2: Minimum DC voltage through a 10kΩ resistor that sets the MAX2654/MAX2655 to operate in normal mode and MAX2656 in low-gain mode. Note 3: Maximum DC voltage through a 10kΩ resistor that sets the MAX2654/MAX2655 to operate in shutdown mode and MAX2656 in high-gain mode. Note 4: DC current required when VRFOUT is connected to VCC through a 10kΩ resistor. Note 5: DC current required when VRFOUT is connected to GND through a 10kΩ resistor. Note 6: Guaranteed by design and characterization to ±3 sigma. Note 7: The part has been characterized at the specified frequency range. Operation outside of this range is possible, but not guaranteed. Note 8: Production tested at TA = +25°C. Note 9: Measured with two input tones, f1 = 1570MHz, f2 = 1580MHz, both at -30dBm per tone. Note 10: Excludes PC board losses of 0.2dB for MAX2654/MAX2655 and 0.25dB for MAX2656. Note 11: High-gain mode is set up by connecting RFOUT to GND through a 12kΩ resistor. Note 12: Low-gain mode is set up by connecting RFOUT to VCC through a 12kΩ resistor. Note 13: Measured with two input tones, f1 = 1955MHz, f2 = 1965MHz, both at -30dBm per tone. 4 ______________________________________________________________________________________ 1575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers 5 TA = +85°C 3 TA = +25°C 2 TA = -40°C 8 4 0 0 3 4 5 VCC = +6V 6 2 6 INPUT LOGIC HIGH AT VRFOUT VCC = +3V -40 -20 0 20 40 60 1.5 INPUT LOGIC LOW AT VRFOUT 1.0 0.5 -40 80 -20 0 20 40 60 TEMPERATURE (°C) TEMPERATURE (°C) MAX2654 INPUT LOGIC CURRENT vs. TEMPERATURE MAX2654 INPUT LOGIC CURRENT vs. TEMPERATURE MAX2654 INPUT IP3 vs. TEMPERATURE INPUT LOGIC LOW AT VRFOUT 6 4 0 50 0 20 40 60 80 -10 -40 -20 0 20 40 60 -40 80 -20 0 20 40 60 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) MAX2654 GAIN vs. FREQUENCY MAX2654 GAIN vs. SUPPLY VOLTAGE MAX2654 NOISE FIGURE vs. FREQUENCY 14 12 GAIN (dB) 10 8 6 3.2 TA = +85°C 13 2.8 TA = -40°C TA = +25°C 3.0 NOISE FIGURE (dB) 14 80 MAX2654 toc09 15 MAX2654 toc07 16 MAX2654 toc08 -20 -8 -9 45 40 -40 f1 = 1570 MHz f2 = 1580 MHz -7 55 INPUT IP3 (dBm) INPUT LOGIC CURRENT (µA) 7 -6 MAX2654 toc05 60 MAX2654 toc04 INPUT LOGIC HIGH AT VRFOUT 80 MAX2654 toc06 SUPPLY VOLTAGE (V) 8 INPUT LOGIC CURRENT (µA) 10 1 2 GAIN (dB) 12 INPUT LOGIC VOLTAGE (V) 6 4 14 SHUTDOWN CURRENT (µA) SUPPLY CURRENT (mA) 7 2.0 MAX2654 toc02 MAX2654 toc01 8 MAX2654 INPUT LOGIC VOLTAGE vs. TEMPERATURE MAX2654 SHUTDOWN CURRENT vs. TEMPERATURE MAX2654 toc03 MAX2654 SUPPLY CURRENT vs. SUPPLY VOLTAGE 12 2.6 2.4 2.2 2.0 4 11 1.8 2 0 10 1000 1200 1400 1600 1800 FREQUENCY (MHz) 2000 2200 f0 = 1575MHz 2.0 2.5 3.0 1.6 3.5 4.0 4.5 5.0 SUPPLY VOLTAGE (V) 5.5 6.0 1000 1200 1400 1600 1800 2000 FREQUENCY (MHz) _______________________________________________________________________________________ 5 MAX2654/MAX2655/MAX2656 Typical Operating Characteristics (PIN = -30dBm, input and output are terminated to 50Ω, VCC = +3V, high-gain and low-gain modes are applicable only to the MAX2656, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (PIN = -30dBm, input and output are terminated to 50Ω, VCC = +3V, high-gain and low-gain modes are applicable only to the MAX2656, TA = +25°C, unless otherwise noted.) MAX2654 NOISE FIGURE vs. TEMPERATURE 1.8 1.6 1.4 1.2 INPUT RETURN LOSS -4 -6 MAX2654 toc12 -2 -25 -30 -35 -40 -45 -50 -8 -55 -10 -20 0 20 40 60 80 -60 1000 1200 1400 1600 1800 2000 1000 1200 2200 1400 1600 1800 2000 TEMPERATURE (°C) FREQUENCY (MHz) FREQUENCY (MHz) MAX2654 OUTPUT POWER vs. INPUT POWER MAX2654 P1dB vs. TEMPERATURE MAX2654 SHUTDOWN TIME fIN = 1575MHz 0 -10 -20 OUTPUT POWER (dBm) P1dB (dBm) -18 -19 -20 2200 MAX2655 toc15 -17 MAX2654 toc13 8 6 4 2 0 -2 -4 -6 -8 -10 -12 -14 -16 MAX2654 toc14 -40 -30 -40 -50 US -60 2.8µs -70 -21 -80 -22 -100 -90 -30 -26 -22 -18 -14 -6 -10 -2 2 -40 -20 0 20 40 60 80 0 1.0 2.0 3.0 4.0 TEMPERATURE (°C) TIME (µs) MAX2655 SUPPLY CURRENT vs. SUPPLY VOLTAGE MAX2655 SUPPLY CURRENT vs. SUPPLY VOLTAGE MAX2655 SUPPLY CURRENT vs. SUPPLY VOLTAGE 7 5 TA = +85°C 4 TA = +25°C 2 TA = -40°C RBIAS = 511Ω ±1% 9 8 SUPPLY CURRENT (mA) 6 3 10 7 6 TA = +85°C 5 TA = +25°C 4 3 TA = -40°C 2 1 3 4 SUPPLY VOLTAGE (V) 5 6 10 8 TA = +85°C 6 TA = +25°C 4 TA = -40°C 0 2 RBIAS = 357Ω ±1% 12 2 1 0 14 SUPPLY CURRENT (mA) RBIAS = 698Ω ±1% MAX2655 toc17 8 MAX2655 toc18 INPUT POWER (dBm) MAX2655 toc16 OUTPUT POWER (dBm) -20 MAX2654 toc11 OUTPUT RETURN LOSS 1.0 6 MAX2654 REVERSE ISOLATION vs. FREQUENCY REVERSE ISOLATION (dB) 2.0 0 INPUT/OUTPUT RETURN LOSS (dB) fIN = 1575MHz 2.2 NOISE FIGURE (dB) MAX2654 INPUT/OUTPUT RETURN LOSS vs. FREQUENCY MAX2654 toc10 2.4 SUPPLY CURRENT (mA) MAX2654/MAX2655/MAX2656 1575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers 0 2 3 4 SUPPLY VOLTAGE (V) 5 6 2 3 4 5 SUPPLY VOLTAGE (V) ______________________________________________________________________________________ 6 1575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers TA = +25°C 10 TA = +85°C 8 6 4 20 VCC = +6V 16 12 VCC = +3V 8 800 1000 1200 1400 1600 RBIAS (Ω) -40 -20 10 9 8 6 INPUT LOGIC HIGH AT VRFOUT INPUT IP3 (dBm) 8 7 6 -40 80 PIN = -30dBm f1 = 1570MHz f2 = 1580MHz 0 20 40 TEMPERATURE (°C) 60 0 -2 2 TA = -40°C 400 TA = +25°C 10 800 1000 1200 1400 1600 TEMPERATURE (°C) TA = +25°C TA = +85°C 12 9 800 1000 1200 1400 1600 RBIAS (Ω) 3.2 RBIAS = 357Ω ±1% 3.0 RBIAS = 511Ω ±1% 2.8 RBIAS = 698Ω ±1% 2.6 2.4 2.2 2.0 1.6 1.4 10 600 3.4 1.8 fIN = 1575MHz RBIAS = 511Ω ±1% 8 2000 2200 MAX2655 NOISE FIGURE vs. FREQUENCY TA = -40°C 13 1800 FREQUENCY (MHz) MAX2655 toc26 14 11 400 1000 1200 1400 1600 600 11 200 RBIAS = 698Ω ±1% 0 15 GAIN (dB) TA = +85°C 12 RBIAS = 511Ω ±1% MAX2655 GAIN vs. SUPPLY VOLTAGE 14 13 RBIAS = 357Ω ±1% 4 TA = +25°C TA = -40°C 15 80 8 6 200 MAX2655 toc25 16 60 12 10 2 MAX2655 GAIN vs. RBIAS fIN = 1575MHz 40 14 TA = +85°C 4 80 20 16 NOISE FIGURE (dB) -20 0 MAX2655 GAIN vs. FREQUENCY -10 -40 -20 MAX2655 INPUT IP3 vs. RBIAS -8 4 60 TEMPERATURE (°C) -6 INPUT LOGIC LOW AT VRFOUT 40 TEMPERATURE (°C) -4 5 20 GAIN (dB) MAX2655 toc22 10 0 MAX2655 toc24 600 MAX2655 toc23 400 MAX2655 INPUT LOGIC CURRENT vs. TEMPERATURE INPUT LOGIC CURRENT (µA) INPUT LOGIC LOW AT VRFOUT 0.5 0 200 GAIN (dB) 1.0 MAX2655 toc27 0 17 1.5 4 2 18 MAX2655 toc21 24 INPUT LOGIC HIGH AT VRFOUT INPUT LOGIC VOLTAGE (V) TA = -40°C 28 SHUTDOWN CURRENT (nA) SUPPLY CURRENT (mA) 14 2.0 MAX2655 toc20 MAX2655 toc19 16 12 MAX2655 INPUT LOGIC VOLTAGE vs. TEMPERATURE MAX2655 SHUTDOWN CURRENT vs. TEMPERATURE MAX2655 SUPPLY CURRENT vs. RBIAS 2.0 2.5 3.0 3.5 4.0 4.5 5.0 SUPPLY VOLTAGE (V) 5.5 6.0 1000 1200 1400 1600 1800 2000 FREQUENCY (MHz) _______________________________________________________________________________________ 7 MAX2654/MAX2655/MAX2656 Typical Operating Characteristics (continued) (PIN = -30dBm, input and output are terminated to 50Ω, VCC = +3V, high-gain and low-gain modes are applicable only to the MAX2656, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (PIN = -30dBm, input and output are terminated to 50Ω, VCC = +3V, high-gain and low-gain modes are applicable only to the MAX2656, TA = +25°C, unless otherwise noted.) 1.2 0 20 40 60 80 -16 FREQUENCY (MHz) MAX2655 SHUTDOWN TIME MAX2655 OUTPUT POWER vs. INPUT POWER -30 -40 -50 -60 5.8µs 4 4.0 5.0 6.0 7.0 MAX2655 toc32 MAX2655 toc30 -10 RBIAS = 511Ω ±1% -4 TA = +85°C -12 -13 TA = +25°C -14 -15 RBIAS = 698Ω ±1% TA = -40°C -16 -17 -18 -30 -26 -22 -18 -14 -10 -6 -2 200 2 400 600 800 1000 1200 1400 1600 TIME (us) INPUT POWER (dBm) RBIAS (Ω) MAX2656 SUPPLY CURRENT vs. SUPPLY VOLTAGE MAX2656 SUPPLY CURRENT vs. SUPPLY VOLTAGE MAX2656 SUPPLY CURRENT vs. SUPPLY VOLTAGE 6 TA = -40°C 5 4 3 10 TA = +25°C 8 TA = -40°C 6 4 MAX2654 toc36 12 TA = +85°C 16 14 SUPPLY CURRENT (mA) TA = +25°C 7 TA = +85°C SUPPLY CURRENT (mA) 8 18 MAX2654 toc35 TA = +85°C 9 14 MAX2654 toc34 10 TA = +25°C 12 10 TA = -40°C 8 6 4 2 RBIAS = 715Ω ±1% HIGH-GAIN MODE 1 RBIAS = 511Ω ±1% HIGH-GAIN MODE 2 2 3 4 SUPPLY VOLTAGE (V) 5 6 RBIAS = 392Ω ±1% HIGH-GAIN MODE 2 0 0 8 fIN = 1575MHz -9 -11 0 8.0 -8 RBIAS = 357Ω ±1% -8 2200 MAX2655 P1dB vs. RBIAS -16 -100 3.0 -50 1600 1800 2000 FREQUENCY (MHz) -12 -90 2.0 -45 1000 1200 1400 fIN = 1575MHz -80 1.0 -40 -60 8 OUTPUT POWER (dBm) -20 0 -35 -55 12 MAX2655 toc31 0 -70 -30 -20 TEMPERATURE (°C) -10 OUTPUT POWER (dBm) -12 P1dB (dBm) -20 -8 INPUT RETURN LOSS -24 1000 1200 1400 1600 1800 2000 2200 1.0 -40 -25 MAX2655 toc33 1.4 OUTPUT RETURN LOSS REVERSE ISOLATION (dB) 1.6 -4 -20 MAX2655 toc29 RBIAS = 511Ω ±1% 0 INPUT/OUTPUT RETURN LOSS (dB) fIN = 1575MHz 1.8 NOISE FIGURE (dB) MAX2655 toc28 2.0 MAX2655 REVERSE ISOLATION vs. FREQUENCY MAX2655 INPUT/OUTPUT RETURN LOSS vs. FREQUENCY MAX2655 NOISE FIGURE vs. TEMPERATURE SUPPLY CURRENT (mA) MAX2654/MAX2655/MAX2656 1575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers 0 2 3 4 SUPPLY VOLTAGE (V) 5 6 2 3 4 SUPPLY VOLTAGE (V) _______________________________________________________________________________________ 5 6 1575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers MAX2656 SUPPLY CURRENT vs. SUPPLY VOLTAGE TA = +25°C TA = -40°C 5 4 3 2 14 12 TA = +25°C 10 8 TA = -40°C 6 4 RBIAS = 511Ω ±1% LOW-GAIN MODE 14 12 10 TA = +25°C TA = -40°C 8 6 0 0 4 5 2 6 3 2 6 3 MAX2654 toc40 HIGH-GAIN MODE SUPPLY CURRENT (mA) 20 TA = +85°C 16 TA = +25°C 8 LOW-GAIN MODE 24 5 6 MAX2656 INPUT LOGIC VOLTAGE vs. TEMPERATURE 20 TA = +85°C 16 TA = +25°C 12 4 SUPPLY VOLTAGE (V) MAX2656 SUPPLY CURRENT vs. RBIAS MAX2656 SUPPLY CURRENT vs. RBIAS 12 5 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) 24 4 2.0 INPUT LOGIC HIGH AT VRFOUT INPUT LOGIC VOLTAGE (V) 3 MAX2654 toc41 2 RBIAS = 392Ω ±1% LOW-GAIN MODE 2 8 MAX2654 toc42 2 0 1.5 1.0 INPUT LOGIC LOW AT VRFOUT 4 4 TA = -40°C TA = -40°C 0 200 400 600 800 0.5 200 1000 1200 1400 1600 400 600 800 1000 1200 1400 1600 -40 -20 0 20 40 60 RBIAS (Ω) RBIAS (Ω) TEMPERATURE (°C) MAX2656 INPUT LOGIC CURRENT vs. TEMPERATURE MAX2656 INPUT IP3 vs. RBIAS MAX2656 INPUT IP3 vs. RBIAS MAX2654 toc43 5 INPUT IP3 (dBm) 0 -10 TA = -40°C 1 INPUT LOGIC HIGH AT VRFOUT -1 TA = +25°C -3 -5 -7 TA = +85°C -9 -11 -20 INPUT LOGIC LOW AT VRFOUT -20 0 20 40 TEMPERATURE (°C) 60 80 TA = +85°C 8 TA = +25°C 6 4 2 0 f1 = 1955MHz f2 = 1965MHz PIN = -20dBm -4 -15 -40 LOW-GAIN MODE 10 -2 f1 = 1955MHz f2 = 1965MHz PIN = -20dBm -13 -30 12 INPUT IP3 (dBm) 10 HIGH-GAIN MODE 3 80 MAX2654 toc45 0 MAX2654 toc44 SUPPLY CURRENT (mA) 16 4 RBIAS = 715Ω ±1% LOW-GAIN MODE 1 INPUT LOGIC CURRENT (µA) TA = +85°C 18 SUPPLY CURRENT (mA) 9 TA = +85°C SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) 10 20 MAX2654 toc38 TA = +85°C 8 7 6 16 MAX2654 toc37 12 11 MAX2656 SUPPLY CURRENT vs. SUPPLY VOLTAGE MAX2654 toc39 MAX2656 SUPPLY CURRENT vs. SUPPLY VOLTAGE TA = -40°C -6 200 400 600 800 1000 1200 1400 1600 RBIAS (Ω) 200 400 600 800 1000 1200 1400 1600 RBIAS (Ω) _______________________________________________________________________________________ 9 MAX2654/MAX2655/MAX2656 Typical Operating Characteristics (continued) (PIN = -30dBm, input and output are terminated to 50Ω, VCC = +3V, high-gain and low-gain modes are applicable only to the MAX2656, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (PIN = -30dBm, input and output are terminated to 50Ω, VCC = +3V, high-gain and low-gain modes are applicable only to the MAX2656, TA = +25°C, unless otherwise noted.) 12 1 GAIN (dB) 8 RBIAS = 698Ω ±1% RBIAS = 511Ω ±1% 0 -1 4 -2 2 -3 1000 1200 1400 12 11 10 MAX2654 toc48 TA = +25°C TA = +85°C 1600 1800 2000 2200 200 400 600 800 1000 1200 1400 1600 FREQUENCY (MHz) FREQUENCY (MHz) RBIAS (Ω) MAX2656 GAIN vs. RBIAS MAX2656 GAIN vs. SUPPLY VOLTAGE MAX2656 GAIN vs. SUPPLY VOLTAGE TA = -40°C RBIAS = 511Ω ±1% f1 = 1960MHz HIGH-GAIN MODE 15.5 2 GAIN (dB) 2 16.0 1 GAIN (dB) 3 RBIAS = 511Ω ±1% fIN = 1960MHz T = -40°C LOW-GAIN MODE A MAX2654 toc51 3 MAX2654 toc50 fIN = 1960MHz LOW-GAIN MODE 0 TA = -40°C 15 14 13 6 1000 1200 1400 2000 2200 MAX2654 toc49 4 1600 1800 fIN = 1960MHz HIGH-GAIN MODE 9 8 7 RBIAS = 715Ω ±1% -4 0 GAIN (dB) RBIAS = 392Ω ±1% 18 17 16 2 RBIAS = 511Ω ±1% 6 LOW-GAIN MODE 3 HIGH-GAIN MODE 10 MAX2656 GAIN vs. RBIAS GAIN (dB) RBIAS = 392Ω ±1% 14 GAIN (dB) 4 MAX2654 toc46 16 MAX2656 GAIN vs. FREQUENCY MAX2654 toc47 MAX2656 GAIN vs. FREQUENCY TA = +25°C TA = +25°C TA = -40°C 15.0 1 TA = +25°C TA = +85°C 14.5 TA = +85°C -1 TA = +85°C -2 0 400 600 800 1000 1200 1400 1600 3.0 3.5 4.0 4.5 5.0 5.5 6.0 3.0 3.5 4.0 4.5 5.0 5.5 6.0 SUPPLY VOLTAGE (V) MAX2656 NOISE FIGURE vs. FREQUENCY MAX2656 NOISE FIGURE vs. TEMPERATURE MAX2656 INPUT/OUTPUT RETURN LOSS vs. FREQUENCY 2.0 RBIAS = 715Ω ±1% 1.8 RBIAS = 511Ω ±1% f1 = 1960MHz RBIAS = 511Ω ±1% 2.2 2.0 1.8 1.6 1.4 1.2 1.4 1500 1600 1700 1800 1900 2000 2100 2200 2300 FREQUENCY (MHz) 1.0 -40 -20 0 20 40 TEMPERATURE (°C) 60 80 0 -2 INPUT/OUTPUT RETURN LOSS (dB) RBIAS = 392Ω ±1% MAX2654 toc53 MAX2654 toc52 2.4 -4 -6 -8 -10 -12 LOW-GAIN MODE OUTPUT RETURN LOSS INPUT RETURN LOSS -14 -16 -18 -20 -22 -24 1000 1200 1400 1600 1800 2000 FREQUENCY (MHz) ______________________________________________________________________________________ 2200 MAX2654 toc54 SUPPLY VOLTAGE (V) 2.2 10 2.5 RBIAS (Ω) 2.4 1.6 14.0 2.5 NOISE FIGURE (dB) 200 NOISE FIGURE (dB) MAX2654/MAX2655/MAX2656 1575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers 1575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers LOW-GAIN MODE -25 INPUT RETURN LOSS -10 -12 -10 -15 -30 OUTPUT POWER (dBm) -6 -35 -40 HIGH-GAIN MODE -45 -50 -20 -25 -30 2.0µs -35 -55 -14 1000 1200 1400 1600 1800 2000 -60 1000 1200 1400 2200 0 2200 1.0 2.0 3.0 4.0 TIME (µs) MAX2656 GAIN STEP TIME FROM HIGH TO LOW MAX2656 OUTPUT POWER vs. INPUT POWER MAX2656 OUTPUT POWER vs. INPUT POWER -30 2.0µs -35 -40 2.0 3.0 4.0 HIGH-GAIN MODE RBIAS = 715Ω ±1% RBIAS = 511Ω ±1% -10 RBIAS = 392Ω ±1% -14 RBIAS = 715Ω ±1% -18 -22 RBIAS = 511Ω ±1% -30 -25 -20 -15 -10 -5 -30 0 TA = +40°C -20 -15 -10 -5 0 MAX2656 P1dB vs. RBIAS 4 2 MAX2654 toc62 fIN = 1960MHz LOW-GAIN MODE -25 INPUT POWER (dBm) INPUT POWER (dBm) MAX2654 toc61 2 -6 -26 MAX2656 P1dB vs. RBIAS 4 fIN = 1960MHz LOW-GAIN MODE -2 RBIAS = 392Ω ±1% -30 TIME (µs) fIN = 1960MHz HIGH-GAIN MODE 0 -2 TA = +25°C -4 -6 TA = +85°C -8 P1dB (dBm) 0 P1dB (dBm) 1.0 fIN = 1960MHz OUTPUT POWER (dBm) OUTPUT POWER (dBm) -25 2 MAX2654 toc59 MAX2654 toc58 -20 10 8 6 4 2 0 -2 -4 -6 -8 -10 -12 -14 -16 -18 -20 MAX2654 toc60 FREQUENCY (MHz) -15 0 -40 1600 1800 2000 FREQUENCY (MHz) -10 OUTPUT POWER (dBm) -20 -4 -8 MAX2656 GAIN STEP TIME FROM LOW TO HIGH MAX2654 toc56 -2 OUTPUT RETURN LOSS REVERSE ISOLATION (dB) HIGH-GAIN MODE MAX2654 toc55 INPUT/OUTPUT RETURN LOSS (dB) 0 MAX2656 REVERSE ISOLATION vs. FREQUENCY MAX2654 toc57 MAX2656 INPUT/OUTPUT RETURN LOSS vs. FREQUENCY TA = -40°C -2 -4 -6 TA = +85°C -8 TA = +25°C -10 -12 -10 200 400 600 800 1000 1200 1400 1600 RBIAS (Ω) 200 400 600 800 1000 1200 1400 1600 RBIAS (Ω) ______________________________________________________________________________________ 11 MAX2654/MAX2655/MAX2656 Typical Operating Characteristics (continued) (PIN = -30dBm, input and output are terminated to 50Ω, VCC = +3V, high-gain and low-gain modes are applicable only to the MAX2656, TA = +25°C, unless otherwise noted.) MAX2654/MAX2655/MAX2656 1575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers Pin Description PIN MAX2655/ MAX2656 NAME MAX2654 DESCRIPTION 1 ––– GND Ground. Connect to the PC board ground plane through a 0.017in x 0.035in line. 2, 5 2, 5 GND Ground. Connect to the PC board ground plane with as low an inductance path as possible. ––– 1 BIAS Bias Control. Connect a resistor RBIAS from BIAS to GND. RBIAS sets IP3 and supply current. 3 3 RFIN Amplifier Input. Requires a DC-blocking capacitor and external matching components. 4 4 VCC Supply Voltage. Bypass to ground with an appropriate capacitor as close to the IC as possible. Refer to MAX2654/MAX2655/MAX2656 EV kits for capacitor values. 6 6 RFOUT RF Output. Incorporates an internal DC-blocking capacitor. RFOUT is internally matched to 50Ω. DC bias on this pin selects gain mode (MAX2656) or shutdown mode (MAX2654/MAX2655) (see Applications Information). Detailed Description The MAX2654/MAX2655/MAX2656 are low-noise amplifiers designed for applications in GPS receivers, satellite and PCS phones. The MAX2655/MAX2656 feature variable IP3s, adjusted by a single external bias resistor. Another feature of the MAX2654/MAX2655 is a power shutdown control mode, eliminating the need for an external supply switch. The MAX2656 features a high- and low-gain control mode selected by an external logic control. Input and Output Ports The MAX2654/MAX2655/MAX2656 incorporate on-chip matching networks to 50Ω at the output ports, eliminating the need for external matching components. (For MAX2655, a shunt inductor is recommended for best output return loss. Refer to the MAX2655 EV kit schematic.) The MAX2654/MAX2655/MAX2656 require simple matching networks at the input ports. The values of these matching components are recommended in the Typical Operating Circuit. Variable IP3 The IP3 of MAX2655 and MAX2656 is adjusted through an external resistor (RBIAS). Tables 1 and 2 summarize the values of RBIAS for different IP3s for MAX2655 and MAX2656. 12 Table 1. RBIAS vs. IP3 for MAX2655 RBIAS (Ω) IP3 (dBm) 698 2.2 ICC (mA) 5.8 357 3.8 10.1 Table 2. RBIAS vs. IP3 for MAX2656 RBIAS (Ω) IP3 (dBm) 715 -3 ICC (mA) 8.5 511 1.5 11.5 Gain-Step Control (MAX2656) The DC bias voltage at RFOUT of the MAX2656 serves as a gain-step control input. When the applied DC voltage at RFOUT through a 10kΩ resistor is less than +0.6V, the device is in high-gain mode. When the applied DC voltage is greater than +2.0V, the device gain is attenuated by 13dB. A standard logic output can be applied as shown in the Typical Operating Circuit. Shutdown-Enable (MAX2654/MAX2655) The DC bias voltage at RFOUT of the MAX2654/ MAX2655 serves as a shutdown enable input. When the applied DC voltage at RFOUT through a 10kΩ resistor is less than +0.6V, the device is in shutdown mode. When the DC voltage is greater than +2V, the device is enabled. ______________________________________________________________________________________ 1575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers Input Matching For optimum performance, input matching is required. The MAX2654/MAX2655/MAX2656 require a simple LC matching network. The Typical Operating Circuit shows the recommended input matching networks. These values are optimized for best simultaneous gain, noise figure, and return loss performance. S-Parameter data can be found on the Maxim website at www.maxim-ic.com. Layout Issues A properly designed PC board is essential to any RFmicrowave circuit. Use controlled impedance lines on all high-frequency inputs and outputs. Bypass VCC with decoupling capacitors located close to the device. For long VCC lines, it may be necessary to add decoupling capacitors. Locate these additional capacitors further 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, connect the GND pins to the board with a multiple vias close to the package. For MAX2654, connect Pin1 to the PC board ground plane through a 0.017in x 0.035in line. Chip Information TRANSISTOR COUNT: 135 (Same for MAX2654, MAX2655, MAX2656) ______________________________________________________________________________________ 13 MAX2654/MAX2655/MAX2656 Applications Information Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) SC70, 6L.EPS MAX2654/MAX2655/MAX2656 1575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers 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 © 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.