Features and Benefits

  • 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

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.

Product Lifecycle icon-recommended Last Time Buy

All products in this family will be obsolete soon. Please contact ADI Sales or Distributors to arrange for final purchases and read our Obsolescence Information to review the time periods for placing final orders and receiving final shipments.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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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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