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MAX3766
622Mbps LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown

Provides Up to 60mA Modulation Current and 80mA Bias Current


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Description
FULL DATA SHEET (PDF, 536kB)
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The MAX3766 is a complete, easy-to-program laser driver for fiber optic LAN transmitters, optimized for operation at 622Mbps. It includes a laser modulator, automatic power control (APC), and a failure indicator with latched shutdown.

Laser modulation current can be programmed up to 60mA at 622Mbps. A programmable modulation temperature coefficient can be used to keep the transmitted extinction ratio nearly constant over a wide temperature range. The modulator operates at data rates up to 1.25Gbps at reduced modulation current. APC circuitry uses feedback from the laser's monitor photodiode to adjust the laser bias current, producing constant output power regardless of laser temperature or age. The MAX3766 supports laser bias currents up to 80mA.

The MAX3766 provides extensive laser safety features, including a failure indicator with latched shutdown and a smooth start-up bias generator. These features help ensure that the transmitter output does not reach hazardous levels. The MAX3766 is available in a compact 20-pin QSOP and dice.

Key Features   Applications/Uses
  • 60mA Modulation Current
  • 80mA Bias Current
  • 200ps Edge Speed
  • Modulation-Current Temperature Compensation
  • Automatic Power Control
  • Laser-Fail Indicator with Latched Shutdown
  • Smooth Laser Start-Up

 
  • 1.25Gbps Ethernet Transmitters
  • 1.25Gbps Fiber Optic LAN Transmitters
  • 622Mbps ATM Transmitters

    Key Specifications:   Laser Drivers
    Part Number Applications Target Operating Range (Gbps) Min. Data Rate (Mbps) Max. Data Rate (Mbps) Supply Voltage (V) Typ. Supply Current (mA) I/O Type Max. IMod (mA) Max. IBias (mA) EV-Kit RoHS Available Package Operating Temp. Range (°C) Price**
    MAX3766 
    Ethernet
    Fibre channel
    Optical Module
    SDH/ SONET/ DWDM/ ATM/ PONs
    1 to 4.5 155 1250 5 64 PECL 60 80 Yes Yes QSOP/20 -40 to +85 $4.00 @ 1k
    See All Laser Drivers (33)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX3766: Typical Operating Circuits
    Typical Application Circuits

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    Document Ref.: 19-1249; Rev 1; 2004-12-15
    This page last modified: 2007-06-01



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