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19-1493; Rev 0; 7/99
L MANUA ION KIT HEET T A U L EVA TA S WS DA FOLLO
Low-Cost, 900MHz, Low-Noise Amplifier and Downconverter Mixer
General Description Features
o 800MHz to 1000MHz RF Frequency Range o +2.7V to +5.5V Single-Supply Operation o Integrated LNA + Mixer + LO Buffer o Logic-Controlled LNA Bypass Switch Reduces Supply Current o LNA Performance (High/Low Gain) Gain: +15dB/-12dB NF: 1.4dB/12dB Input IP3: -4dBm/+16dBm o Mixer Performance (High/Low Gain) Gain: 6dB/4.6dB NF: 13dB/12dB Input IP3: +7dBm/-1.5dBm o Supply Current 8.5mA (High Gain) 3.8mA (Low Gain) o <0.1µA Supply Current in Shutdown Mode o 0.8µs Receiver Enable Time
MAX2685
The MAX2685’s low-noise amplifier (LNA) and downconverter mixer comprise the major blocks of an RF front-end receiver.