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AD797:  Ultralow Distortion, Ultralow Noise Op Amp

Product Details


Newer Alternatives:
  • AD8597 Ultralow Distortion, Ultralow Noise Op Amp (single)
  • ADA4898-1 and ADA4898-2 with similar noise, 36V maximum supply, unity gain internally compensated with a slew rate of 55 V/μs
  • ADA4627-1 30 V, 19 MHz, Low Noise, Low Bias Current, JFET Op Amp

The AD797 is a very low noise, low distortion operational amplifier ideal for use as a preamplifier. The low noise of 0.9 nV(root)Hz and low total harmonic distortion of -120 dB at audio bandwidths give the AD797 the wide dynamic range necessary for preamps in microphones and mixing consoles.

Furthermore, the AD797's excellent slew rate of 20 V/µs and 110 MHz gain bandwidth make it highly suitable for low frequency ultrasound applications.

The AD797 is also useful in IR and Sonar Imaging applications where the widest dynamic range is necessary. The low distortion and 16-bit settling time of the AD797 make it ideal for buffering the inputs to Sigma Delta ADCs or the outputs of high resolution DACs especially when they are used in critical applications such as seismic detection and spectrum analyzers. Key features such as a 50 mA output current drive and the specified power supply voltage range of ±5 to ±15 volts make the AD797 an excellent general purpose amplifier.

Applications

  • Professional audio preamplifiers
  • IR, CCD, and sonar imaging systems
  • Spectrum analyzers
  • Ultrasound preamplifiers
  • Seismic detectors
  • Σ-Δ ADC/DAC buffers
  • FEATURES and BENEFITS

    • Low Noise:
      0.9 nV/vHz typ (1.2 nV/vHz max) Input
      Voltage Noise at 1 kHz
      50 nV p-p Input Voltage Noise, 0.1 Hz to
      10 Hz
    • Low Distortion:
      -120 dB Total Harmonic Distortion at 20 kHz
    • Excellent DC Precision
      80 µV max Input Offset Voltage
      1.0 µV/°C VOS Drift
    • High Output Drive Current of 50 mA
    • Excellent AC Characteristics
      800 ns Settling Time to 16 Bits
      (10 V Step)
      110 MHz Gain Bandwidth (G = 1000)
      8 MHz Bandwidth (G = 10)
      280 kHz Full Power Bandwidth at
      20 V p-p
      20 V/µs Slew Rate
    • Specified for ±5 V and
      ±15 V Power Supplies

    Pin Diagram

    Documentation

    Title Content Type File Type
    AD797: Ultralow Distortion, Ultralow Noise Op Amp Data Sheet (Rev J, 02/2014) (pdf, 514 kB) Data Sheets PDF
    AN-940: Low Noise Amplifier Selection Guide for Optimal Noise Performance  (pdf, 199 kB) Application Notes PDF
    AN-649: Using the Analog Devices Active Filter Design Tool  (pdf, 5301 kB) Application Notes PDF
    AN-106: A Collection of Amp Applications  (pdf, 1094 kB)
    Examines Some of the Numerous and Widely Used Applications of the Operational Amplifier
    Application Notes PDF
    AN-358: Noise and Operational Amplifier Circuits  (pdf, 593 kB) Application Notes PDF
    ADI Warns Against Misuse of COTS Integrated Circuits  (pdf, 13 kB)
    (Revised 1/03)
    Invites Customer Participation in Creative Mil/Aero System Solutions
    Recommended Reading PDF
    Maximizing Eight-Channel Data-Acquisition System Performance Using a Single ADC Driver
    This article shows how a single op amp can be used to drive the analog-to-digital converter (ADC) in an 8-channel data-acquisition system, reducing the cost and size of the overall system.
    (ECN, July 23, 2009)
    Technical Articles HTML
    Op-Amp Issues--Noise Analog Dialogue HTML
    Ask The Applications Engineer-13
    Confused About Amplifier Distortion Specs?

    (Analog Dialogue, 30th Anniversary Reader Bonus)
    Analog Dialogue HTML
    Space Qualified Parts List  (pdf, 93 kB)
    This document lists 67 (240+) space level products that are available from Analog Devices. Many of the products listed are state-of-the-art data conversion and signal processing products that were previously only available as commercial or military Class B products. Through our Space Products Group and MIL-PRF-38535 certified Level V (Class S) facility, we are pleased to offer these products to the space marketplace.
    Aerospace Information PDF
    What is a "decompensated" op amp? FAQs/RAQs HTML
    What do I do with the "null pins" on the amplifier if I don't plan to use them? FAQs/RAQs HTML
    RAQs index Rarely Asked Questions HTML
    Glossary of EE Terms Glossary HTML

    Design Tools,Models,Drivers & Software

    Title Content Type File Type
    OpAmp Error Budget Calculator
    An online tool to illustrate range, gain and accuracy issues in simple opamp buffers.
    Amplifier Error Budget Analysis HTML
    AD797 SPICE Macro-Model SPICE Models 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.

    SampleSample & Buy

    Price, packaging, availability

    AD797 Model Options
    Model Package Pins Temp.
    Range
    Packing,
    Qty
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    AD797ANZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $4.80 $4.32 Y  Material Info PCN Purchase
    AD797AR Status: Production 8 ld SOIC 8 Ind Tube, 98 $5.55 $5.00 N  Material Info Notify Me Purchase
    AD797AR-REEL Status: Last Time Buy 8 ld SOIC 8 Ind Reel, 2500 - $5.00 N  Material Info PDN Purchase
    AD797AR-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 750 $5.55 $5.00 N  Material Info Notify Me Purchase
    AD797ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $4.80 $4.32 Y  Material Info Notify Me Purchase
    AD797ARZ-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $4.32 Y  Material Info Notify Me Purchase
    AD797ARZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 750 $4.80 $4.32 Y  Material Info Notify Me Purchase
    AD797BR Status: Production 8 ld SOIC 8 Ind Tube, 98 $7.55 $6.79 N  Material Info Notify Me Purchase
    AD797BR-REEL Status: Last Time Buy 8 ld SOIC 8 Ind Reel, 2500 - $6.79 N  Material Info PDN Purchase
    AD797BR-REEL7 Status: Last Time Buy 8 ld SOIC 8 Ind Reel, 750 $7.55 $6.79 N  Material Info PDN Purchase
    AD797BRZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $6.52 $5.88 Y  Material Info Notify Me Purchase
    AD797BRZ-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $5.88 Y  Material Info Notify Me Purchase
    AD797BRZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 750 $6.52 $5.88 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.

    EVAL-OPAMP-1 Evaluation Board
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    EVAL-PRAOPAMP-1KSZ Status: Production Single KS-5 lead SC70 Evaluation Board $20.19 Yes -
    EVAL-PRAOPAMP-1RJZ Status: Production Single RJ-5 lead SOT23 Evaluation Board $20.19 Yes -
    EVAL-PRAOPAMP-1RMZ Status: Production Single RM-8 lead MSOP Evaluation Board $20.19 Yes -
    EVAL-PRAOPAMP-1RZ Status: Production Single R-8 lead SOIC Evaluation Board $20.19 Yes -

    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.

    Check Inventory & Purchase

    View Sales and Distribution Offices

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