MAX2424

19-1350 Rev 2; 2/99 L MANUA ION KIT HEET T A U L EVA TA S WS DA FOLLO 900MHz Image-Reject Receivers with Transmit Mixer ____________________________Features o Receive Mixer with 35dB Image Rejection o Adjustable-Gain LNA o Up to +2dBm Combined Receiver Input IP3 o 4dB Combined Receiver Noise Figure o Optimized for Common Receiver IF Frequencies: 10.7MHz (MAX2424) 70MHz (MAX2426) o PA Predriver Provides up to 0dBm o Low Current Consumption: 23mA Receive 20mA Transmit 9.5mA Oscillator o 0.5µA Shutdown Mode o Operates from Single +2.7V to +4.8V Supply ________________General Description The MAX2424/MAX2426 highly integrated front-end ICs provide the lowest cost solution for cordless and ISMband radios operating in the 900MHz band. Both devices incorporate a receive image-reject mixer (to reduce filter cost) as well as a versatile transmit mixer. The devices operate from a +2.7V to +4.8V single power supply, allowing direct connection to a 3-cell battery stack. The receive path incorporates an adjustable-gain LNA and an image-reject downconverter with 35dB image suppression. These features yield excellent combined downconverter noise figure (4dB) and high linearity with an input third-order intercept point (IIP3) of up to +2dBm. The transmitter consists of a double-balanced mixer and a power amplifier (PA) predriver that produces up to 0dBm (in some applications serving as the final power stage). It can be used in a variety of configurations, including BPSK modulation, direct ...