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ADN2847:  3.3 V Dual-Loop 50 Mbps to 3.3 Gbps Laser Diode Driver

Product Details


The ADN2847 uses a unique control algorithm to control both average power and extinction ratio of the laser diode (LD) after initial factory setup. External component count and PCB area are low, as both power and extinction ratio control are fully integrated. Programmable alarms are provided for laser fail (end of life) and laser degrade (impending fail).

Optional dual MPD current monitoring is designed into the ADN2847 specifically for DWDM wavelength control.

The ADN2847 is specified for the −40°C to +85°C temperature range and is available in a 48-lead LFCSP package and a 32-lead LFCSP package.

Applications

  • SONET OC-1/3/12/48
  • SDH STM-0/1/4/16
  • Fibre Channel
  • Gigabit Ethernet
  • DWDM dual MPD wavelength control

FEATURES and BENEFITS

  • 50 Mbps to 3.3 Gbps operation
  • Single 3.3 V operation
  • Typical rise/fall time: 80 ps
  • Bias current range: 2 mA to 100 mA
  • Modulation current range: 5 mA to 80 mA
  • Monitor photodiode current: 50 µA to 1200 µA
  • Dual MPD functionality for DWDM
  • 50 mA supply current at 3.3 V
  • Closed-loop control of power and extinction ratio
  • Full current parameter monitoring
  • Laser fail and laser degrade alarms
  • Automatic laser shutdown (ALS)

Functional Block Diagram for ADN2847

Documentation

Title Content Type File Type
ADN2847: 3V Dual Loop 50 Mbps to 3.3 Gbps Laser Diode Driver Data Sheet (Rev B, 03/2012) (pdf, 615 kB) Data Sheets PDF
AN-654: Optical Module Development Platform 2.5 Gbps Transmitter with Digital Diagnostics  (pdf, 387 kB)
The SFP Digital Diagnostics Development Board is a platform designed to enable optical module designers to develop SFP and SFF compliant transceivers with digital diagnostics.
Application Notes PDF
AN-658: Optical Channel Identification on the ADN284x Laser Drivers (Part I)  (pdf, 234 kB) Application Notes PDF
AN-638: ADN2847 AC-Coupled Optical Evaluation Kit  (pdf, 451 kB)
This application note describes the 32-lead ADN2847 laser diode driver Rev. A1 evaluation kit. The evaluation kit is a demonstration board that provides ac -coupled opti - cal evaluation of the ADN2847. This document describes how to configure the board to operate these parts optically.
Application Notes PDF
AN-631: ADN2841/ADN2847 DC-Coupled Optical Evaluation Kit  (pdf, 596 kB)
This application note describes the 32-lead ADN2841/ADN2847 laser diode driver Rev. A1 evaluation kit. The evaluation kit is a demonstration board that provides a dc-coupled optical evaluation of the ADN2841 or ADN2847. This document describes how to configure the board in order to operate these parts optically.
Application Notes PDF
Dual-Loop Laser Drivers Bring Robustness To Optical Networks
... A new breed of laser drivers raises the bar in optical transmission for long-term stability, manufacturability, and maintainability.
Technical Articles HTML
ADN2847: Continuous Rate 3.3 Gbps Laser Diode Driver with Dual-Loop Control  (pdf, 203 kB) Overview PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

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.

SampleSample & Buy

Price, packaging, availability

ADN2847 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADN2847ACPZ-32 Status: Production 32 ld LFCSP (5x5mm CP-32-2) 32 Comm. Tray, 490 $11.28 $8.05 Y  Material Info PCN Purchase
ADN2847ACPZ-32-RL Status: Last Time Buy 32 ld LFCSP (5x5mm CP-32-2) 32 Comm. Reel, 5000 - $8.05 Y  Material Info PCN/PDN Purchase
ADN2847ACPZ-32-RL7 Status: Production 32 ld LFCSP (5x5mm CP-32-2) 32 Comm. Reel, 1500 - $8.05 Y  Material Info PCN Purchase
ADN2847ACPZ-48 Status: Production 48 ld LFCSP 7x7mm (5.25EP) 48 Ind Tray, 260 - - Y  Material Info PCN Contact ADI
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.


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