2.4GHz 802.11b Zero-IF Transceiver with Integrated PA and Tx/Rx Switch

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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.

Key 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


  • 802.11b Embedded Modules
  • 802.11b PC Cards, Mini-PCI Cards
  • 802.11b PDAs and Smartphones

MAX2822EVKIT: Evaluation Kit for the MAX2822

Technical Documents

Tutorial 5100 General Layout Guidelines for RF and Mixed-Signal PCBs
Product Reliability Reports: MAX2822.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >


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