Overview

Features and Benefits

  • SFP/SFF MSA and SFF-8472 compliant
  • SFP reference design available
  • 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
  • 3.3 V operation
  • 4 mm × 4 mm LFCSP
  • Voltage setpoint control
  • Resistor setpoint control
  • RoHS compliant

Product Details

The ADN2870 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 to be calibrated at 25°C, eliminating the expensive and time consuming temperature calibration. The ADN2870 supports single-rate operation from 50 Mbps to 3.3 Gbps or multirate operation from 155 Mbps to 3.3 Gbps.

Average power and extinction ratios can be set with reference voltages provided by a microcontroller DAC or by adjustable resistors. The ADN2870 provides bias and modulation current monitoring as well as fail alarms and automatic laser shutdown. The device interfaces easily with the ADuC702x family of MicroConverters® and with the ADN289x family of limiting amplifiers to make a complete SFP/SFF transceiver solution. An SFP reference design is available. The product 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

Product Categories

Product Lifecycle icon-not-recommended Not Recommended for New Designs

This designates products ADI does not recommend broadly for new designs.

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Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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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.


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