Low Noise, Low Input Bias Current, Rail-to-Rail
Output, JFET Dual Operational Amplifier
Data Sheet
Rev. C Document Feedback
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 ©2012–2013 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
FEATURES
Low T
C
V
OS
: ±5 µV/°C typical
Low input bias current: 20 pA typical at V
SY
= ±15 V
Low noise
7.7 nV/√Hz typical at f = 1 kHz
1.2 µV rms at 20 Hz to 20 kHz
Low distortion: 0.00006%
No phase reversal
Rail-to-rail output
Unity-gain stable
APPLICATIONS
Instrumentation
Medical instruments
Multipole filters
Precision current measurement
Photodiode amplifiers
Sensors
Audio
PIN CONFIGURATION
10375-002
OUT A
1
–IN A
2
+IN A
3
V–
4
V+
8
OUT B
7
–IN B
6
+IN B
5
ADA4001-2
TOP VIEW
(Not to Scale)
Figure 1. 8-Lead SOIC_N (R Suffix)
GENERAL DESCRIPTION
The ADA4001-2 is a dual channel JFET amplifier that features
low input voltage noise and current noise, input bias current,
and rail-to-rail output.
The combination of low noise and low input bias current makes
this amplifier especially suitable for high impedance sensor
amplification. With low noise and fast settling times, the
ADA4001-2 provides good accuracy for medical instruments,
electronic measurement, and automated test equipment. Unlike
many competitive amplifiers, the ADA4001-2 maintains fast
settling performance even with substantial capacitive loads,
and, unlike many older JFET amplifiers, the ADA4001-2 does
not suffer from output phase reversal when input voltages
exceed the maximum common-mode voltage range.
With fast slew rate and great stability under capacitive loads, the
ADA4001-2 is a good fit for filter applications. With low input
bias currents and noise, it offers a wide dynamic range for photodi-
ode amplifier circuits. Low noise and distortion, along with
high output current and excellent speed, make the ADA4001-2
a great choice for audio applications.
The ADA4001-2 is specified over the −40°C to +125°C extended
industrial temperature range.
The ADA4001-2 is available in an 8-lead narrow SOIC package.
