Alternative Parts

Overview

Features and Benefits

  • Low Noise
  • 0.9 nV/√Hz typ (1.2 nV/√Hz 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
  • 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
  • High Output Drive Current of 50 mA

Product Details

The AD797 is a very low noise, low distortion operational amplifier ideal for use as a preamplifier. The low noise of 0.9 nV√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

Product Lifecycle icon-recommended 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 (2)

Tools & Simulations

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OpAmp Error Budget Calculator

An online tool to illustrate range, gain and accuracy issues with Op Amp.

Analog Filter Wizard

Use the Analog Filter Wizard to design low-pass, high-pass, or band-pass filters with actual op amps in minutes. As you progress through the design process, you can observe the characteristics of your filter design from ideal specifications to real world circuit behavior. Quickly evaluate the tradeoffs in op amp specifications - including gain-bandwidth, noise, and supply current – to determine the best filter design for your requirements.

Analog Photodiode Wizard

Use Photodiode Wizard to design a transimpedance amplifier circuit to interface with a photodiode. Select a photodiode from the library included in the tool, or enter custom photodiode specifications. Quickly observe tradeoffs between Bandwidth, Peaking (Q), and ENOB/SNR. Modify circuit parameters, and immediately see results in plots for pulse response, frequency response, and noise gain.

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.

PCN-PDN Information

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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.