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

Product Details

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

Applications/Uses

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

Technical Docs

Design & Development

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Description

The MAX2822 evaluation kit (EV kit) simplifies testing of the MAX2822. The EV kit provides 50Ω SMA connectors for all RF and baseband inputs and outputs. Differential-to- single-ended and single-ended-to-differential line drivers are provided to convert the differential I/Q baseband inputs and outputs to single ended.

The EV kits simplify evaluation of the MAX2822's receive and transmit performance in 802.11b applications operating in the 2.4GHz to 2.5GHz ISM band.

View Details

Features

  • On-Board Line Drivers and Voltage Reference
  • 50Ω SMA Connectors on All RF and Baseband Ports
  • SPI™/QSPI™/MICROWIRE™ Compatible
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    Support & Training

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    Parameters

    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

    Applications/Uses

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

    Description

    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.

    Technical Docs

    Support & Training

    Search our knowledge base for answers to your technical questions.

    Filtered Search

    Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal