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ADN2820:  10.7 Gbps Low Noise, High Gain Transimpedance Amplifier IC with Performance Monitor

Product Details

The ADN2820 is a compact, high performance SiGe transimpedance amplifier (TIA) optimized for 10 Gbps metro access and Ethernet applications. It is a single-chip solution for detecting photodiode current with a high gain differential output voltage for use in any optical module. With exceptionally low input noise and a high transimpedance, the ADN2820 can directly drive a CDR or transceiver without need of an external post amplifier. Not only is overall performance augmented by the elimination of noise contribution from the post amplifier, but design complexity is simplified and manufacturability improved with reduced space and power consumption. The feature set of the ADN2820 includes functionality previously found in post amplifiers, providing the same level of flexibility as more complex solutions. Slice (offset) adjust is included to minimize duty cycle distortion, while an analog power monitor is incorporated to enable loss of power alarms.

The ADN2820 operates from a single power supply at +3.3V. It is available in die form.


  • Technology: high performance SiGe
  • Bandwidth: 9 GHz
  • Input noise current density:
    1.0 µA
    Optical sensitivity: -19.3 dBm
  • Differential transimpedance: 5000 V/A
  • Input current overload:
    2.8 mA p-p
  • Power dissipation: 200 mW
  • Linear input range: 0.15 mA p-p
  • Output resistance: 50 Ω/side
  • Output offset adjustment range: 240 mV
  • Average input power monitor:
    1 V/mA
  • Die size: 0.87 mm x 1.06 mm

Functional Block Diagram for ADN2820


For the opportunity to sample the ADN2820 please contact the High Speed Networking Group and include your name, title, company and a description of your application.


Title Content Type File Type
ADN2820: 10.7 Gbps, 3.3V Low Noise, TIA With Average Power Monitor Data Sheet  (Rev 0, 11/2003) (pdf, 798 kB) Data Sheets PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

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ADN2820 Model Options
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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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