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+3.0V to +5.5V, 2.5Gbps VCSEL and Laser Driver

Product Details

The MAX3996 is a high-speed laser driver for small-form-factor (SFF) fiber optic LAN transmitters. It contains a bias generator, a laser modulator, and comprehensive safety features. Automatic power control (APC) adjusts the laser bias current to maintain average optical power, regardless of changes in temperature or laser properties. The driver accommodates common anode or differential laser configurations. The output current range of the MAX3996 is appropriate for VCSELs and high-efficiency edge-emitting lasers.

The MAX3996 operates up to 3.2Gbps. It can switch up to 30mA of laser modulation current and sink up to 60mA bias current. Adjustable temperature compensation is provided to keep the optical extinction ratio within specifications over the operating temperature range. The MAX3996 accommodates various laser packages, including low-cost TO-46 headers. Low deterministic jitter (9psP-P), combined with fast edge transitions, (65ps) provides excellent margins compared to industry-standard transmitter eye masks.

This laser driver provides extensive safety features to guarantee single-point fault tolerance. Safety features include a transmit disable, redundant shutdown, and laser-bias monitoring. The safety circuit detects faults that could cause hazardous light levels and immediately disables the laser output. The MAX3996 safety circuits are compliant with SFF and small-form-factor pluggable (SFP) multisource agreements (MSA).

The MAX3996 is available in a compact 4mm x 4mm, 20-pin QFN package and a 20-pin thin QFN package. It operates over a temperature range of 0°C to +70°.

Key Features

  • 9psP-P Deterministic Jitter
  • 20-Pin QFN 4mm x 4mm Package
  • 3.0V to 5.5V Supply Voltage
  • Automatic Power Control
  • Integrated Safety Circuits
  • 30mA Laser Modulation Current
  • Temperature Compensation of Modulation Current
  • Compliant with SFF and SFP MSA

Applications/Uses

  • 10-Gigabit Ethernet WWDM
  • ATM LAN Optical Transmitters
  • Fibre Channel Optical Transmitters
  • Gigabit Ethernet Optical Transmitters
  • VCSEL Transmitters
Parametric specs for Laser Drivers
Target Oper. Range (Gbps) 1 to 4.5
Data Rate (Mbps) (min) 1000
Data Rate (Mbps) (max) 3125
VSUPPLY (V) 5
IMOD (mA) (max) 40
IBIAS (mA) (max) 60
Package/Pins TQFN/20
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Simplified Block Diagram

MAX3996: Typical Application Circuit MAX3996: Typical Application Circuit Zoom icon

Design & Development

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Description

The MAX3996 evaluation kit (EV kit) is an assembled demonstration board that provides both optical and electrical evaluation of the MAX3996 2.5Gbps laser driver.

The output of the electrical evaluation section is interfaced to an SMA connector that can be connected to a 50Ω terminated oscilloscope. The output of the optical evaluation section is configured for attachment to a laser/monitor diode.

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Features

  • Drives Common-Anode Lasers
  • Fully Assembled and Tested
  • LED Fault Indicator
  • Adjustable Laser Bias Current
  • Adjustable Laser Modulation Current
  • Adjustable Laser Modulation Temperature Coefficient
  • Configured for Electrical Operation; No Laser Necessary
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    Support & Training

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    Parameters

    Parametric specs for Laser Drivers
    Target Oper. Range (Gbps) 1 to 4.5
    Data Rate (Mbps) (min) 1000
    Data Rate (Mbps) (max) 3125
    VSUPPLY (V) 5
    IMOD (mA) (max) 40
    IBIAS (mA) (max) 60
    Package/Pins TQFN/20

    Key Features

    • 9psP-P Deterministic Jitter
    • 20-Pin QFN 4mm x 4mm Package
    • 3.0V to 5.5V Supply Voltage
    • Automatic Power Control
    • Integrated Safety Circuits
    • 30mA Laser Modulation Current
    • Temperature Compensation of Modulation Current
    • Compliant with SFF and SFP MSA

    Applications/Uses

    • 10-Gigabit Ethernet WWDM
    • ATM LAN Optical Transmitters
    • Fibre Channel Optical Transmitters
    • Gigabit Ethernet Optical Transmitters
    • VCSEL Transmitters

    Description

    The MAX3996 is a high-speed laser driver for small-form-factor (SFF) fiber optic LAN transmitters. It contains a bias generator, a laser modulator, and comprehensive safety features. Automatic power control (APC) adjusts the laser bias current to maintain average optical power, regardless of changes in temperature or laser properties. The driver accommodates common anode or differential laser configurations. The output current range of the MAX3996 is appropriate for VCSELs and high-efficiency edge-emitting lasers.

    The MAX3996 operates up to 3.2Gbps. It can switch up to 30mA of laser modulation current and sink up to 60mA bias current. Adjustable temperature compensation is provided to keep the optical extinction ratio within specifications over the operating temperature range. The MAX3996 accommodates various laser packages, including low-cost TO-46 headers. Low deterministic jitter (9psP-P), combined with fast edge transitions, (65ps) provides excellent margins compared to industry-standard transmitter eye masks.

    This laser driver provides extensive safety features to guarantee single-point fault tolerance. Safety features include a transmit disable, redundant shutdown, and laser-bias monitoring. The safety circuit detects faults that could cause hazardous light levels and immediately disables the laser output. The MAX3996 safety circuits are compliant with SFF and small-form-factor pluggable (SFP) multisource agreements (MSA).

    The MAX3996 is available in a compact 4mm x 4mm, 20-pin QFN package and a 20-pin thin QFN package. It operates over a temperature range of 0°C to +70°.

    Simplified Block Diagram

    MAX3996: Typical Application Circuit MAX3996: Typical Application Circuit Zoom icon

    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