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MAX3737
Multirate Laser Driver with Extinction Ratio Control

Multirate Laser Driver with Extinction-Ratio Control Designed for Multirate Transceiver Modules with Data Rates from 155Mbps to 2.7Gbps


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Status
Active: In Production.

Description
FULL DATA SHEET (PDF, 480kB)
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The MAX3737 is a +3.3V laser driver designed for multirate transceiver modules with data rates from 155Mbps to 2.7Gbps. Lasers can be DC-coupled to the MAX3737 for reduced component count and ease of multirate operation.

Laser extinction ratio control (ERC) combines the features of automatic power control (APC), modulation compensation, and built-in thermal compensation. The APC loop maintains constant average optical power. Modulation compensation increases the modulation current in proportion to the bias current. These control loops combined with thermal compensation maintain a constant optical extinction ratio over temperature and lifetime.

The MAX3737 accepts differential data input signals. The wide 5mA to 60mA (up to 85mA AC-coupled) modulation current range and up to 100mA bias current range makes the MAX3737 ideal for driving FP/DFB lasers in fiber-optic modules. External resistors set the required laser current levels. The MAX3737 provides transmit disable control (TX_DISABLE), single-point fault tolerance, bias-current monitoring, modulation-current monitoring, and photocurrent monitoring. The device also offers a latched failure output (TX_FAULT) to indicate faults, such as when the APC loop is no longer able to maintain the average optical power at the required level. The MAX3737 is compliant with the SFF-8472 transmitter diagnostic and SFP MSA timing requirements.

The MAX3737 is offered in a 5mm x 5mm 32-pin thin QFN and QFN package and operates over the -40°C to +85°C extended temperature range.

An evaluation kit is available:  MAX3737EVKIT  

Key Features   Applications/Uses
  • Single +3.3V Power Supply
  • 47mA Power-Supply Current
  • 85mA Modulation Current
  • 100mA Bias Current
  • Automatic Power Control (APC)
  • Modulation Compensation
  • On-Chip Temperature Compensation
  • Self-Biased Inputs for AC-Coupling
  • Ground-Referenced Current Monitors
  • Laser Safety, Shutdown, and Alarm Outputs

 
  • 1Gbps/2Gbps Fibre Channel SFF/SFP and GBIC Transceivers
  • Gigabit Ethernet SFF/SFP and GBIC Transceivers
  • Multirate OC-3 to OC-48 FEC Transceivers

    Key Specifications:  Laser Drivers
    Part Number Target Oper. Range
    (Gbps)
    Data Rate
    (Mbps)
    Data Rate
    (Mbps)
    VSUPPLY
    (V)
    ICC
    (mA)
    I/O Type IMOD
    (mA)
    IBIAS
    (mA)
    EV Kit Package/Pins Price
    min max typ max max See Notes
    MAX3737  1 to 4.5 155 2700 3.3 47 CML 85 100 Yes
    QFN/32
    TQFN/32
    $6.00 @1k
    See All Laser Drivers (24)

    Diagram
    MAX3737: Typical Operating Circuit
    Typical Operating Circuit

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    Document Ref.: 19-2818; Rev 2; 2004-08-17
    This page last modified: 2009-10-13


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