High Voltage, Low Noise, Low Distortion, Unity Gain Stable, High Speed, Dual 8-Lead Op Amp
High Voltage, Low Noise, Low Distortion, Unity Gain Stable, High Speed Op Amp
Ultralow Distortion, Ultralow Noise Op Amp (single)
Lower power, higher slew rate, better precision
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
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.
Markets & Technology
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)
The ADSP-SC589 EZ-KIT Lite and EZ-Board® are evaluation systems for the ADSP-SC58x family of SHARC® processors. The ADSP-SC589 processor is based on the SHARC+™ core dual processor with the ARM® Cortex-A5™ processor core and is designed for a wide array of markets, from automotive and pro-audio to industrial-based applications that require high floating-point performance. The EZ-Board is shipped with all of the necessary hardware—you can start the evaluation immediately. The package contains the standalone evaluation board, CE-approved power supply, and USB cable. The EZ-KIT Lite® version ships with an EZ-Kit license for CrossCore® Embedded Studio (CCES) and the ICE-1000 emulator, while the EZ-Board version requires the customer to provide an ICE-1000 or ICE-2000 emulator. The EZ-Kit license gives the user a full, subscription based license to use CCES with only the ADSP-SC589 EZ-KIT Lite evaluation board.
Expansion Interface III connectors are provided for interfacing with additional extender boards to provide LCD, camera, video, and audio. Traditional mechanical switches for changing the board's factory setup have been removed in favor of I2C controlled software switches. The only remaining mechanical switches are the boot mode switch, JTAG configuration switches, and push buttons.
The evaluation board is designed to be used in conjunction with the CrossCore® Embedded Studio (CCES) development tools to test capabilities of the ADSP-SC58x processors. The development environment aids advanced application code development and debug, such as:
- Create, compile, assemble, and link application programs written in C++, C, and assembly
- Load, run, step, halt, and set breakpoints in application programs
- Read and write data and program memory
- Read and write core and peripheral registers
Features & Benefits
- ADSP-SC589 529-pin 19x19mm BGA
- 4Gb DDR3 Memory
- 128 Mb SPI Flash
- 2 x Ethernet (1x 10/100, 1x GigE)
- ADAU1979 quad ADC
- ADAU1962A 12 channel 24-bit DAC
- SPDIF in/out, optical & coax
- 2 CAN transceivers + RJ11 connectors
- USB OTG
- USB HS
- SD/MMC memory connector
- EI3 Expansion Interface
- EZLITE includes ICE-1000 JTAG emulator and a permanent CrossCore® Embedded Studio license for use with the EZLITE via ICE-1000
The Universal Precision Op Amp Evaluation Boards have 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
Tools & Simulations
AD797 SPICE Macro Models
An online tool to illustrate range, gain and accuracy issues with Op Amp.
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.
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.
Technical Articles (1)
Analog Dialogue (5)
Rarely Asked Questions (2)
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.
Sample & Buy
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.