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Low-Cost, 900MHz, Low-Noise Amplifier and Downconverter Mixer _______________________________________________________________________________________ 3 AC ELECTRICAL CHARACTERISTICS (continued) (MAX2685 EV kit, VCC = V SHDN = +3V, fLNAIN = fMIXIN = 880MHz, fLO = 960MHz, PLNAIN = -30dBm, PLO = -8dBm, PMIXIN = -25dBm, differential IFOUT operation, Zo = 50Ω, TA = +25°C, unless otherwise noted.) Note 1: This is the recommended operating frequency range. Note 2: Maximum and minimum limits are guaranteed by design and device characterization and are not production tested. Note 3: Two tones at 880MHz and 880.1MHz, -30dBm per tone. Note 4: Two tones at 880MHz and 880.1MHz, -10dBm per tone. Note 5: Two tones at 880MHz and 880.1MHz, -25dBm per tone. Note 6: Time from SHDN = high, until the cascaded receive gain is within 1dB of its final value. Measured with 47pF blocking capacitors on LNAIN and LNAOUT. Matching network removed from IFOUT output. Typical Operating Characteristics (MAX2685 EV kit, VCC = V SHDN = +3V, fLNAIN = fMIXIN = 880MHz, fLO = 960MHz, PLNAIN = -30dBm, PLO = -8dBm, PMIXIN = -25dBm, differential IFOUT operation, Zo = 50Ω, TA = +25°C, unless otherwise noted.) 0 3 2 1 4 5 6 7 8 9 10 2.5 3.5 3.0 4.0 4.5 5.0 5.5 SUPPLY CURRENT vs. SUPPLY VOLTAGE SUPPLY VOLTAGE (V) GAIN = HIGH GAIN = LOW TA = +85°C TA = +25°C TA = -40°C TA = +85°C TA = +25°C TA = -40°C 0 3 2 1 4 5 6 7 8 9 10 2.5 3.5 3.0 4.0 4.5 5.0 5.5 SHUTDOWN SUPPLY CURRENT vs. SUPPLY VOLTAGE SUPPLY VOLTAGE (V) SHDN = GND TA = -40°C TA = +25°C TA = +85°C -15 -5 -10 5 0 15 10 20 2.5 3.5 4.0 3.0 4.5 5.0 5.5 LNA GAIN vs. SUPPLY VOLTAGE SUPPLY VOLTAGE (V) GAIN = HIGH GAIN = LOW TA = +85°C TA = +25°C T A = -40°C TA = +85°C TA = +25°C TA = -40°C GAIN = GND dB 12.1 Mixer Noise Figure (SSB) GAIN = VCC, TA = TMIN to TMAX (Note 2) GAIN = VCC dB 12 Mixer Conversion Gain Variation over Temperature (Note 6) dB GAIN = VCC GAIN = GND CONDITIONS µs 0.8 Receiver Enable Time 13 7 dBm -1.5 Mixer Input IP3 (Note 5) 11 LO Port Return Loss UNITS MIN TYP MAX PARAMETER dB SHDN = VCC or GND 53 LO-to-LNAIN Isolation dB dB 28 LNAOUT-to-MIXIN Isolation 31 LO-to-MIXIN Isolation OVERALL SYSTEM |
