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ADN2892:  3.3 V 4.25 Gb/s Limiting Amplifier

Product Details

The ADN2892 is a high gain, limiting amplifier optimized for use in Fibre Channel and GbE optical receivers. The ADN2892 accepts input levels of up to 2.0 V p-p differential and has 3 mV p-p differential input sensitivity. The ADN2892 provides the receiver functions of quantization and loss of signal (LOS) detection.

The ADN2892 has an on-chip selectable filter to reduce the BW of the limamp to 1.5GHz in order to filter out the relaxation oscillation of legacy 1Gb/s Fiber Channel transmitters with CD lasers. The reduced BW will also allow for more optical Rx sensitivity margin at the lower data rates such as 1xFC and 1GbE in multi-rate modules.

The limiting amplifier also measures average received power based on a direct measurement of the photodiode current with better than 1 dB of accuracy over the entire input range of the receiver. This eliminates the need for external average Rx power detection circuitry in SFF-8472 compliant optical transceivers.

The ADN2892 limiting amplifier operates from a single 3.3 V supply, has low power dissipation, and is available in a spacesaving 3 x 3 mm 16-lead lead frame chip scale package (LFCSP).


  • SFP/SFF/GBIC optical transceivers
  • 1x/2x/4x Multi-rate Fibre Channel receivers
  • LX4
  • WDM transponders


  • SFP reference design available
  • Input sensitivity: 3 mV p-p
  • 65 ps rise/fall times
  • BW Select to support Multi-Rate 1x/2x/4x FC modules
  • Optional LOS Output Inversion to support SFF
  • CML outputs: 700 mV p-p differential
  • Programmable LOS detector: 3 mV to 45 mV
  • Rx signal strength indicator (RSSI): SFF-8472 compliant average power measurement
  • Single supply operation: 3.3 V
  • Low power dissipation: 160 mW
  • Available in space-saving 3 × 3 mm 16-lead LFCSP
  • Increased Temperature Range: -40°C to 95°C

Functional Block Diagram for ADN2892


For an opportunity to receive a copy of the Applications Note: Detailed Applications and Design Information for ADI's SFP Reference Design, please contact the Fiber Optic IC Development Group.


Title Content Type File Type
ADN2892: 3.3 V, 4.25 Gbps, Limiting Amplifier Data Sheet (Rev B, 02/2014) (pdf, 523 kB) Data Sheets PDF
Transceiver targets 4x Fibre Channel Applications
New optical transceiver chipset and reference design from Analog Devices supports both gigabit Ethernet and Fibre Channel data rates up to 4.25 Gbps (eeProductCenter, 1/20/05)
Product Reviews HTML
SFP Chipset and Reference Design Simplify 4.25 Gbps Transceivers Overview HTML
Optical and High Speed Networking  (pdf, 2236 kB)
Analog Devices’ optical and high speed networking ICs solve a depth and breadth of challenges faced by today’s designers of datacom and telecom systems, optical modules, and subsystems. Analog Devices products address a wide range of networking applications from O/E/O conversion, clock recovery, and backplane transmission to monitoring and control of optical power, power management, and clock generation and distribution.
Overview PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

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Price, packaging, availability

ADN2892 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADN2892ACPZ-500RL7 Status: Production 16 ld LFCSP (3x3mm, 1.3mm exposed pad) 16 Ind Reel, 500 - $4.10 Y  Material Info PCN Purchase
ADN2892ACPZ-RL Status: Last Time Buy 16 ld LFCSP (3x3mm, 1.3mm exposed pad) 16 Ind Reel, 5000 - $4.10 Y  Material Info PCN/PDN Purchase
ADN2892ACPZ-RL7 Status: Production 16 ld LFCSP (3x3mm, 1.3mm exposed pad) 16 Ind Reel, 1500 - $4.10 Y  Material Info PCN 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.

ADN2892 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
EVAL-ADN2892EBZ Status: Production Evaluation Board $354.20 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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