MAX2820A

19-2493; Rev 5; 5/05 2.4GHz 802.11b Zero-IF Transceivers MAX2820/MAX2820A/MAX2821/MAX2821A General Description The MAX2820/MAX2820A and MAX2821/MAX2821A single-chip zero-IF transceivers are designed for the 802.11b (11Mbps) applications operating in the 2.4GHz to 2.5GHz ISM band. The transceivers are nearly identical, except the MAX2821 and MAX2821A also provide a low-power shutdown mode and an analog voltage reference output. The MAX2820A/ MAX2821A are cost-reduced versions, virtually identical in pinout and performance to the MAX2820/ MAX2821. The transceivers include all the circuitry required to implement an 802.11b RF-to-baseband transceiver solution, providing a fully integrated receive path, transmit path, VCO, frequency synthesis, and baseband/control interface. Only a PA, RF switch, RF BPF, and a small number of passive components are needed to form the complete radio front-end solution. The ICs eliminate the need for external IF and baseband filters by utilizing a direct-c...