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MAX2839
2.3GHz to 2.7GHz MIMO Wireless Broadband RF Transceiver

Industry's First Production-Ready, Single-Chip MIMO WiMAX RF Transceiver Operating at 2.3GHz to 2.7GHz


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Description
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The MAX2839 direct conversion, zero-IF, RF transceiver is designed specifically for 2GHz 802.16e MIMO mobile WiMAX systems. The device incorporates one transmitter and two receivers, with > 40dB isolation between each receiver. The MAX2839 completely integrates all circuitry required to implement the RF transceiver function, providing RF to baseband receive path, and baseband to RF transmit path, VCO, frequency synthesizer, crystal oscillator, and baseband/control interface. The device includes a fast-settling sigma-delta RF synthesizer with smaller than 40Hz frequency steps and a crystal oscillator that allows the use of a low-cost crystal in place of a TCXO. The transceiver IC also integrates circuits for on-chip DC-offset cancellation, I/Q error, and carrier leakage detection circuits. An internal transmit to receive loopback mode allows for receiver I/Q imbalance calibration. The local oscillator I/Q quadrature phase error can be digitally corrected in approximately 0.125° steps. Only an RF bandpass filter (BPF), crystal, RF switch, PA, and a small number of passive components are needed to form a complete wireless broadband RF radio solution.

The MAX2839 completely eliminates the need for an external SAW filter by implementing on-chip programmable monolithic filters for both the receiver and transmitter, for all 2GHz and 802.16e profiles and WIBRO. The baseband filters along with the Rx and Tx signal paths are optimized to meet the stringent noise figure and linearity specifications. The device supports up to 2048 FFT OFDM and implements programmable channel filters for 3.5MHz to 20MHz RF channel bandwidths. The transceiver requires only 2µs Tx-Rx switching time. The IC is available in a small 56-pin TQFN package measuring 8mm x 8mm x 0.8mm.

Key Features   Applications/Uses
  • 2.3GHz to 2.7GHz Wideband Operation
  • Dual Receivers for MIMO, Single Transmitter
  • Complete RF Transceiver, PA Driver, and Crystal Oscillator
    • 2.3dB Rx Noise Figure on Each Receiver
    • -35dB Rx EVM for 64QAM Signal
    • 0dBm Linear OFDM Transmit Power (64QAM)
    • -70dBr Tx Spectral Emission Mask
    • -35dBc LO Leakage
    • Automatic Rx DC Offset Correction
    • Monolithic Low-Noise VCO with -39dBc Integrated Phase Noise
    • Programmable Rx I/Q Lowpass Channel Filters
    • Programmable Tx I/Q Lowpass Anti-Aliasing Filters
    • Sigma-Delta Fractional-N PLL with < 40Hz Step
    • 62dB Tx Gain Control Range with 1dB Step Size, Digitally Controlled
    • 95dB Rx Gain Control Range with 1dB Step Size, Digitally Controlled
    • 60dB Analog RSSI Instantaneous Dynamic Range
    • 4-Wire SPI™ Digital Interface
    • I/Q Analog Baseband Interface
    • Digital Tx/Rx Mode Control
    • Digitally Tuned Crystal Oscillator
    • On-Chip Digital Temperature Sensor Readout
  • +2.7V to +3.6V Transceiver Supply
  • Low-Power Shutdown Current
  • Small, 56-Pin TQFN Package (8mm x 8mm x 0.8mm)

 
  • 802.11g or n WLAN with MRC or MIMO Down Link
  • 802.16e Mobile WiMAX™ Systems
  • Korean WIBRO Systems
  • Proprietary Wireless Broadband Systems

    Key Specifications:   RF Transceivers
    Part Number Features Frequency Range (MHz) Supply Current (mA) Footprint (mm x mm) Package
    MAX2839 
    -35dB Rx EVM for 64QAM Signal
    2.3dB Receiver Noise Figure
    62dB Tx Gain Control Range
    95dB Rx Gain Control Range
    Dual MIMO Receivers
    On-Chip DC Offset Cancellation
    On-Chip Rx & Tx IQ Phase Adjust
    Programmable Channel Filter, 1.75 to 28MHz
    2300 to 2700 Rx: 117 (both Rx ON)
    Tx: 116 (16QAM)
    8.0 x 8.0 THIN QFN/56
    See All RF Transceivers (13)

    Evaluation Kits
  • MAX2839EVKIT

    Design Guides
  • Wireless (PDF)

    Reliability Reports
  • Show FIT data for:
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    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-2 of 2

    MAX2839 Free
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    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX2839ETN+  
    THIN QFN;56 pin;
    Dwg: 21-0135 (PDF)
    Use pkgcode/variation: T5688+2*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX2839ETN+T  
    THIN QFN;56 pin;
    Dwg: 21-0135 (PDF)
    Use pkgcode/variation: T5688+2*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    Notes and Comments
    Contact factory for the radio reference design or the complete RF and baseband reference design.

    More Information
  • New Product Press Release 2008-04-28 

    Related Products
    MAX2837 2.3GHz to 2.7GHz Wireless Broadband RF Transceiver
    MAX2838 3.3GHz to 3.8GHz Wireless Broadband RF Transceiver

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    Document Ref.: 19-3218; Rev 1; 2008-03-11
    This page last modified: 2008-10-17



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