MAX2822

19-2884; Rev 0; 7/03 KIT ATION EVALU E L B A IL AVA 2.4GHz 802.11b Zero-IF Transceiver with Integrated PA and Tx/Rx Switch General Description Features ♦ 2.4GHz to 2.5GHz ISM Band Operation ♦ 802.11b (11Mbps CCK and 22Mbps PBCC) PHY Compatible ♦ Integrated +17dBm PA ♦ Integrated PA Power Detector ♦ Integrated Transmit/Receive Switch ♦ Complete RF-to-Baseband Transceiver Direct Up/Down Conversion Monolithic Low-Phase-Noise VCO Integrated Baseband Lowpass Filters Integrated PLL with 3-Wire Serial Interface Digital Bias Control for PA Transmit Power Control Receive Baseband AGC Complete Baseband Interface Digital Tx/Rx Mode Control ♦ -95dBm Rx Sensitivity at 1Mbps ♦ -85dBm Rx Sensitivity at 11Mbps ♦ Single +2.7V to +3.0V Supply ♦ 2µA Shutdown Mode ♦ Very Small 48-Pin QFN Package MAX2822 The MAX2822 single-chip transceiver is designed for 802.11b (11Mbps) applications operating in the 2.4GHz to 2.5GHz ISM band. The transceiver includes all the circuitry required to implement an 802.11b RF-to-baseband transceiver solution, including the power amplifier, transmit/receive switch, and 50Ω matching. The fully integrated receive path, transmit path, VCO, frequency synthesis, and baseband/control interface provide all the required active RF circuitry. Only a small number of passive components are needed to form the complete radio front-end solution. The IC eliminates the need for external IF SAW and RF image-reject filters by utilizing a direct-conversion radio architecture and mono...