AD820

Single-Supply, Rail-to-Rail, Low Power FET-Input Op Amp
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Product Details

The AD820 is a precision, low power FET input op amp that can operate from a single supply of 5 V to 36 V, or dual supplies of ±2.5 V to ±18 V. It has true single-supply capability, with an input voltage range extending below the negative rail, allowing the AD820 to accommodate input signals below ground in the single-supply mode. Output voltage swing extends to within 10 mV of each rail, providing the maximum output dynamic range.

Offset voltage of 800 μV maximum, offset voltage drift of 2 μV/°C, typical input bias currents below 25 pA, and low input voltage noise provide dc precision with source impedances up to 1 GΩ. 1.8 MHz unity gain bandwidth, −93 dB THD at 10 kHz, and 3 V/μs slew rate are provided for a low supply current of 800 μA. The AD820 drives up to 350 pF of direct capacitive load and provides a minimum output current of 15 mA. This allows the amplifier to handle a wide range of load conditions. This combination of ac and dc performance, plus the outstanding load drive capability, results in an exceptionally versatile amplifier for the single-supply user.

The AD820 is available in two performance grades. The A and B grades are rated over the industrial temperature range of −40°C to +85°C. The AD820 is offered in three 8-lead package options: plastic DIP (PDIP), surface mount (SOIC) and (MSOP).

Applications

  • Battery-powered precision instrumentation
  • Photodiode preamps
  • Active filters
  • 12-bit to 14-bit data acquisition systems
  • Medical instrumentation
  • Low power references and regulators
  • Data Sheet, Rev. F, 11/08

    Product Lifecycle

    checked Production

    At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

    Evaluation Kits

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    Product Details

    The Universal Precision Op Amp Evaluation Boards has been designed and optimized for many circuit configurations allowing the users to best suit their applications. These boards are all RoHs Compliant. See references below on what board to order by lead count and package.

    • EVAL-PRAOPAMP-1KSZ (Single 5-Lead SC70) KS-5
    • EVAL-PRAOPAMP-1RJZ (Single 5-Lead SOT 23) RJ-5
    • EVAL-PRAOPAMP-1RMZ (Single 8-Lead MSOP) RM-8
    • EVAL-PRAOPAMP-1RZ (Single 8-Lead SOIC) R-8

    Reference Materials

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    Design Resources

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    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.

    AD820 Material Declaration
    PCN-PDN Information Quality And Reliability Symbols and Footprints

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    Overview

    3 Reviews
    3 out of 3 (100%) customers recommend this product.
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    Most Helpful Review

    by Anonymous
    If the +Input of a BufferAmp becomes higher then V+, the output goes to V-. Not usefull for the auto range voltmeter of my switching board. A 10 kOhm resistor in series to the input didn't help to prevent the overload effect.

    Most Recent Review

    by RFAutomation
    Promising performance, ultra small footprint package suitable for low cost, space limited design. Samples request is almost done immediately upon on request. RF engineer love the most.

    All Reviews

    by RFAutomation, 17 Oct 13
    Future of RF
    Promising performance, ultra small footprint package suitable for low cost, space limited design. Samples request is almost done immediately upon on request. RF engineer love the most.
    Was this Helpful?Helpful(0)
    by ssepm, 11 Sep 13
    excelent product
    thanks so much for your support this is a great device...I need to do another tests...regards
    Was this Helpful?Helpful(0)
    by Anonymous, 25 Sep 12
    As long the Input stays within V+ and V-, its a great device.
    If the +Input of a BufferAmp becomes higher then V+, the output goes to V-. Not usefull for the auto range voltmeter of my switching board. A 10 kOhm resistor in series to the input didn't help to prevent the overload effect.
    Was this Helpful?Helpful(0)

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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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    Evaluation Boards Pricing displayed is based on 1-piece.
    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.