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ADN2872:  3.3 V Dual-Loop, 50 Mbps to 3.3 Gbps Laser Diode Driver

Product Details


Like the ADN2870, the ADN2872 laser diode driver is designed for advanced SFP and SFF modules, using SFF-8472 digital diagnostics. The device features dual-loop control of the average power and extinction ratio, which automatically compensates for variations in laser characteristics over temperature and aging. The laser needs only be calibrated at 25°C, eliminating the need for expensive and time consuming temperature calibration. The ADN2872 supports single-rate operation from 50 Mbps to 3.3 Gbps, or multirate operation from 155 Mbps to 3.3 Gbps. With a new alarm scheme, this device avoids the shutdown issue caused by the system transient generated from various lasers.

The average power and extinction ratio can be set with a voltage provided by a microcontroller DAC or by a trimmable resistor. The part provides both bias and modulation current monitoring, as well as fail alarms and automatic laser shutdown. The ADN2872, a SFF-/SFP-compliant laser diode driver, can work with the Analog Devices, Inc., ADuC7019/ADuC702x MicroConverter® family and the ADN289x limiting amplifier family, to form a complete SFP/SFF transceiver solution. The ADN2872 is available in a space-saving 4 mm × 4 mm LFCSP specified over the −40°C to +85°C temperature range.


Applications
  • Multirate OC3 to OC48-FEC SFP/SFF modules
  • 1×/2×/4× Fibre Channel SFP/SFF modules
  • LX-4 modules DWDM/CWDM SFP modules
  • 1GE SFP/SFF transceiver modules
  • FEATURES and BENEFITS

    • SFP/SFF and SFF-8472 MSA compliant
    • SFP reference design available
    • Any rate from 50 Mbps to 3.3 Gbps operation
    • Dual-loop control of average power and extinction ratio
    • Typical rise/fall time: 60 ps
    • Bias current range: 2 mA to 100 mA
    • Modulation current range: 5 mA to 90 mA
    • Laser FAIL alarm and automatic laser shutdown (ALS)
    • Bias and modulation current monitoring
    • See data sheet for additional features

    Functional Block Diagram for ADN2872

    Evaluation Kits & Symbols & Footprints

    Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

    Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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    Price, packaging, availability

    ADN2872 Model Options
    Model Package Pins Temp.
    Range
    Packing,
    Qty
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADN2872ACPZ Status: Production 24 ld LFCSP (4x4mm w/2.30mm EP) 24 Ind Tray, 490 $5.01 $4.78 Y  Material Info Notify Me Purchase Sample
    ADN2872ACPZ-R7 Status: Production 24 ld LFCSP (4x4mm w/2.30mm EP) 24 Ind Reel, 1500 - $4.78 Y  Material Info Notify Me Purchase
    ADN2872ACPZ-RL Status: Production 24 ld LFCSP (4x4mm w/2.30mm EP) 24 Ind Reel, 5000 - $4.78 Y  Material Info Notify Me Purchase
    Price Table Help

    The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

    ADN2872 Evlauation Board
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    EVALZ-ADN2872 Status: Production Evaluation Board - Yes - Contact ADI

    Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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