ADN2873:  3.3 V, 50 Mbps to 4.25 Gbps, Single-Loop, Laser Diode Driver

Like the ADN2870, the ADN2873 laser diode driver (LDD) is designed for advanced SFP and SFF modules, using SFF-8472 digital diagnostics. The ADN2873 ...More

ADN2873:  3.3 V, 50 Mbps to 4.25 Gbps, Single-Loop, Laser Diode Driver

Product Description

Like the ADN2870, the ADN2873 laser diode driver (LDD) is designed for advanced SFP and SFF modules, using SFF-8472 digital diagnostics. The ADN2873 supports NRZ data transmission operation from 50 Mbps up to 4.25 Gbps. With a new alarm scheme, this device avoids the shutdown issue caused by the system transient generated from various lasers.

The ADN2873 monitors the laser bias and modulation currents and it provides fail alarms and ALS. Using setup voltages of a microcontroller DAC or a trimmable resistor voltage divider, the ADN2873 can set up a laser optical average output power and extinction ratio. The optical average power control loop consists of an optical feedback from a photodiode, the comparator, and a status holder. The ADN2873 works easily with the Analog Devices, Inc., ADuC7019/ADuC702x family of MicroConverter® devices and with the ADN289x family of limiting amplifiers to make a complete SFP/SFF transceiver chipset solution.

The ADN2873 is pin compatible with the ADN2870 dual-loop LDD, allowing the same design to work with either device. For dual-loop control applications, refer to the ADN2870 data sheet.

The product is available in a space-saving 24-lead, 4 mm × 4 mm LFCSP specified over the −40°C to +85°C temperature range.

Applications

  • 1×/2×/4× Fibre Channel SFP/SFF modules
  • Multirate OC3 to OC48-FEC SFP/SFF modules
  • LX-4 modules
  • DWDM/CWDM laser transmitters
  • HDTV (SMPTE family) laser transmitters

Data Sheet, Rev 0, 07/2008

Features

  • SFP/SFF and SFF-8472 MSA compliant
  • SFP reference design available
  • 50 Mbps to 4.25 Gbps operation
  • Automatic average power control
  • Typical 60 ps output rise/fall time
  • VCSEL, DFB, and FP laser support
  • Bias current range: from 2 mA to 100 mA
  • See data sheet for additional features

Diagrams

ADN2873 Functional Block Diagram
ADN2873 Functional Block Diagram

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ADN2873 - 3.3 V, 50 Mbps to 4.25 Gbps, Single-Loop, Laser Diode Driver

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Part# Data Rate (Gbps) Voltage Supply (V) Laser Bias Current (mA) Single Ended/Differential Modulation Current (mA) Rise/Fall Time (ps) Dual Loop MSA Compliance Package Price* (1000-4999)
ADN2525 10.7 3.3 100 Differential 80 24 - XFP, Xenpak, X2, MSA-300 3x3 mm LFCSP $21.14
ADN2530 11.3 3.3 25 Differential 23 26 - - 3x3 mm LFCSP $15.49
ADN2830 - 5 200 Single Ended - - - - 5x5 mm LFCSP $8.60
ADN2841 2.7 5 100 Both 80 80 X SFF 5x5 mm LFCSP, 7x7 mm LFCSP $17.15
ADN2847 3.3 3.3 100 Both 80 80 X SFF 5x5 mm LFCSP, 7x7 mm LFCSP $8.05
ADN2848 1.25 3.3 100 Both 80 80 X SFF 5x5 mm LFCSP $5.85
ADN2870 3.3 3.3 100 Both 90 60 X SFP-SFF-8472 4x4 mm LFCSP $5.31
ADN2871 4.25 3.3 100 Both 90 60 - - 4x4 mm LFCSP $4.30

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

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This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
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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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*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.
**Sample availability may be better than production availability. Please enter samples iinto your cart to check sample availability.

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