Single-Supply, Rail-to-Rail
Low Power FET-Input Op Amp
AD822-EP
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2010 Analog Devices, Inc. All rights reserved.
FEATURES
True single-supply operation
Input voltage range extends below ground
Output swings rail-to-rail
Single-supply capability from 5 V to 30 V
Dual-supply capability from ±2.5 V to ±15 V
High load drive
Capacitive load drive of 350 pF, G = +1
Minimum output current of 15 mA
Excellent ac performance for low power
800 µA maximum quiescent current per amplifier
Unity-gain bandwidth: 1.8 MHz
Slew rate of 3 V/s
Good dc performance
800 µV maximum input offset voltage
2 µV/°C typical offset voltage drift
25 pA maximum input bias current
Low noise
13 nV/√Hz @ 10 kHz
No phase inversion
ENHANCED PRODUCT FEATURES
Supports defense and aerospace applications (AQEC
standard)
Military temperature range (−55°C to +125°C)
Controlled manufacturing baseline
One assembly/test site
One fabrication site
Enhanced product change notification
Qualification data available on request
APPLICATIONS
Photodiode preamps
Active filters
12-bit to 14-bit data acquisition systems
Low power references and regulators
CONNECTION DIAGRAM
1
2
3
4
8
7
6
5
AD822-EP
OUT1
–IN1
+IN1
V–
V+
OUT2
–IN2
+IN2
09208-001
Figure 1. 8-Lead SOIC_N (R Suffix)
GENERAL DESCRIPTION
The AD822-EP is a dual precision, low power FET input op
amp that can operate from a single supply of 5 V to 30 V or dual
supplies of ±2.5 V to ±15 V. It has true single-supply capability
with an input voltage range extending below the negative rail,
allowing the AD822 to accommodate input signals below
ground in the single-supply mode. Output voltage swing
extends to within 10 mV of each rail, providing the maximum
output dynamic range.
FREQUENCY (Hz)
1
10 10k
1k
100
INPUT VOLTAGE NOISE (nV/√Hz)
100
10
09208-002
Figure 2. Input Voltage Noise vs. Frequency
Offset voltage of 800 μV maximum, offset voltage drift of 2 μV/°C,
input bias currents below 25 pA, and low input voltage noise
provide dc precision with source impedances up to a gigaohm.
The 1.8 MHz unity-gain bandwidth, –93 dB THD at 10 kHz,
and 3 V/μs slew rate are provided with a low supply current of
800 μA per amplifier.
