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622Mbps, Ultra-Low-Power, 3.3V Transimpedance Preamplifier for SDH/SONET

Product Details

Key Features

Applications/Uses

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Key Features

  • Single +3.3V Supply Operation
  • 55nARMS Input-Referred Noise
  • 6kΩ Gain
  • 85mW Power
  • 300µA Peak Input Current
  • 200ps Max Pulse-Width Distortion
  • Differential Output Drives 100Ω Load
  • 590MHz Bandwidth
  • Applications/Uses

    • PIN/Preamplifier Receivers
    • Regenerators for SDH/SONET
    • SDH/SONET Receivers

    Description

    The MAX3664 low-power transimpedance preamplifier for 622Mbps SDH/SONET applications consumes only 85mW. Operating from a single +3.3V supply, it converts a small photodiode current to a measurable differential voltage. A DC cancellation circuit provides a true differential output swing over a wide range of input current levels, thus reducing pulse-width distortion. The differential outputs are back-terminated with 60Ω per side.

    The transimpedance gain is nominally 6kΩ. For input signal levels beyond approximately 100µAp-p, the amplifier will limit the output swing to 900mV. The MAX3664's low 55nA input noise provides a typical sensitivity of -33.2dBm in 1300nm, 622Mbps receivers.

    The MAX3664 is designed to be used in conjunction with the MAX3675 clock recovery and data retiming IC with limiting amplifier. Together, they form a complete 3.3V, 622Mbps SDH/SONET receiver.

    In die form, the MAX3664 is designed to fit on a header with a PIN diode. It includes a filter connection, which provides positive bias for the photodiode through a 1kΩ resistor to VCC. The device is also available in 8-pin SO and µMAX packages.

    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 .