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 monolithic baseband filters for both receiver and transmitter. It is specifically optimized for 802.11b (11Mbps CCK) and 22Mbps PBCC™ applications. The baseband filtering and Rx and Tx signal paths support the CCK modulation scheme for BER = 10-5 at the required sensitivity levels. The transceiver is suitable for the full range of 802.11b data rates (1Mbps, 2Mbps, 5.5Mbps, and 11Mbps) as well as the higher-rate 22Mbps PBCC standard. The MAX2822 is available in the very small 7mm x 7mm 48-lead QFN or thin QFN packages. The small solution size makes it ideal for small form-factor 802.11b applications such as PDAs, SmartPhones, and embedded modules. Applications * 802.11b Embedded Modules * 802.11b PC Cards, Mini-PCI Cards * 802.11b PDAs and Smartphones * 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