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AD797: Ultralow Distortion, Ultralow Noise Op Amp Data Sheet (Rev. K)6/30/2008PDF514 kB
Alternative Parts
ADA4898-2
High Voltage, Low Noise, Low Distortion, Unity Gain Stable, High Speed, Dual 8-Lead Op Amp
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
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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 Categories
Markets and Technologies
Product Lifecycle
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)
Documentation & Resources
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Low Noise Amplifier Selection Guide for Optimal Noise Performance7/24/2020
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AN-106: A Collection of Amp Applications2/14/2015PDF1094 kB
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AN-358: Noise and Operational Amplifier Circuits2/14/2015PDF593 kB
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FAQs7/26/2017
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Can You Really Get ppm Accuracies from Op Amps?7/17/2019 Analog Dialogue
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No Pain High Gain: Building a Low-Noise Instrumentation Amplifier with Nanovolt Sensitivity5/1/2015 Analog Dialogue
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ADuC7026 Provides Programmable Voltages for Evaluating Multiple Power Supply Systems8/1/2012 Analog Dialogue
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Maximizing Eight-Channel Data-Acquisition System Performance Using a Single ADC Driver7/23/2009
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8-channel data-acquisition system uses single ADC driver12/1/2008 Analog Dialogue
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Ask the Applications Engineer—18: Settling Time4/1/1995 Analog Dialogue
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LIGO is Ahead of What's Possible10/15/2018
Tools & Simulations
SPICE Models
AD797 SPICE Macro Models
Design Tools
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.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| AD797ANZ | Material Declaration | Reliability Data | 8-Lead PDIP | |
| AD797ARZ | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD797ARZ-REEL | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD797ARZ-REEL7 | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD797BRZ | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD797BRZ-REEL | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD797BRZ-REEL7 | Material Declaration | Reliability Data | 8-Lead SOIC | |
| Wafer Fabrication Data |
PCN-PDN Information
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Support & Discussions
AD797 Discussions
Sample & Buy
Ordering FAQs
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
List Pricing
(*)The 1Ku 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. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
Please see the latest communication from our CCO regarding lead times.
Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
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.