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ADN2891:  3.3 V, 3.2 Gbps Limiting Amplifier

Product Details


The ADN2891 is a high gain, 3.2Gb/s limiting amplifier optimized for use in SONET, Gigabit Ethernet (GbE), and Fibre Channel optical receivers that accept input levels of up to 2.0 V p-p differential and have 4 mV p-p differential input sensitivity. The ADN2891 provides the receiver functions of quantization and loss of signal (LOS) detection. The ADN2891 operates at up to 3.2 Gb/s to support LX4 transceivers. 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 ADN2891 limiting amplifier operates from a single 3.3 V supply, has low power dissipation, and is available in a space saving 3 mm × 3 mm 16-lead lead frame chip scale package (LFCSP).

FEATURES and BENEFITS

  • SFP reference design available
  • Input sensitivity: 4 mV p-p
  • 80 ps rise/fall times
  • CML outputs: 700 mV p-p differential
  • Rx signal strength indicator (RSSI): SFF-8472 compliant average power measurement
  • Programmable LOS detector: 3.5 mV to 35 mV
  • Single-supply operation: 3.3 V
  • Low power dissipation: 145 mW
  • Available in space-saving 3 mm × 3 mm 16-lead LFCSP
  • Extended Temperature Range: -40°C to 95°C

Functional Block Diagram for ADN2891

Documentation

Title Content Type File Type
ADN2891: 3.3 V 3.2 Gbps, Limiting Amplifier Data Sheet  (Rev A, 07/2005) (pdf, 605 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

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

ADN2891 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADN2891ACPZ-500RL7 Status: Production 16 ld LFCSP (3x3mm, 1.50mm exposed pad) 16 Ind Reel, 500 - $4.05 Y  Material Info PCN Purchase
ADN2891ACPZ-RL Status: Production 16 ld LFCSP (3x3mm, 1.50mm exposed pad) 16 Ind Reel, 5000 - $4.05 Y  Material Info PCN Purchase
ADN2891ACPZ-RL7 Status: Production 16 ld LFCSP (3x3mm, 1.50mm exposed pad) 16 Ind Reel, 1500 - $4.05 Y  Material Info PCN Purchase
ADN2891ACPZ-WP Status: Production 16 ld LFCSP (3x3mm, 1.50mm exposed pad) 16 Ind Tray, 50 - $4.05 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.

ADN2891 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-ADN2891EBZ 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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