Features and Benefits
- Single-supply operation
- Output swings rail-to-rail
- Input voltage range extends below ground
- Single-supply capability from 3 V to 36 V
- High load drive
- Capacitive load drive of 1000 pF, G = +1
- Linear output current of 40mA, 0.5 V from supplies
- Excellent ac performance on 2.6 mA/amplifier
- −3 dB bandwidth of 17 MHz, G = +1
- 325 ns settling time to 0.01% (2 V step)
- Slew rate of 30 V/µs
- Good dc performance
- 700 µV maximum input offset voltage
- 1 µV/°C offset voltage drift
- 25 pA maximum input bias current
- Low distortion: −110 dBc worst harmonic at 20 kHz
- Low noise: 14 nV/√Hz at 10 kHz
- No phase inversion with inputs to the supply rails
The AD823A is a dual precision, 17 MHz, JFET input op amp manufactured in the extra fast complementary bipolar (XFCB) process. The AD823A can operate from a single supply of 3 V to 36 V or from dual supplies of ±1.5 V to ±18 V. It has true single-supply capability with an input voltage range extending below ground in single-supply mode. Output voltage swing extends to within 17 mV of each rail for IOUT ≤ 100 µA, providing outstanding output dynamic range.
An offset voltage of 700 µV maximum, an offset voltage drift of 1 µV/°C, typical input bias currents of 0.3 pA, and low input voltage noise provide dc precision with source impedances up to 1 GΩ. The AD823A provides 17 MHz, −3 dB bandwidth, −110 dB THD at 20 kHz, and a 30 V/µs slew rate with a low supply current of 2.6 mA per amplifier. The AD823A drives more than 1000 pF of direct capacitive load as a follower and provides a linear output current of 40 mA, 0.5 V from the supply rails. This lets the amplifier 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 ampli¬fier for applications such as ADC drivers, high speed active filters, and other low voltage, high dynamic range systems.
The AD823A is available over the industrial temperature range of −40°C to +85°C and is offered in an 8-lead SOIC package and the 8-lead MSOP package.Applications
- Battery-powered precision instrumentation
- hotodiode preamps
- Active filters
- 12-bit to 16-bit data acquisition systems
- Medical instrumentation
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 (1)
The Universal Dual High Speed Amplifier Evaluation Boards are bare boards that enables users to quickly prototype a variety of amplifier circuits, which minimizes risk and reduces time to market. These boards are all RoHs Compliant. See ordering guide below on what board to order by lead count and package.
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
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.
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.