PIN CONFIGURATIONS
Low offset voltage: 1 μV
Input offset drift: 0.005 μV/°C
Rail-to-rail input and output swing
5 V/2.7 V single-supply operation
High gain: 145 dB typical
CMRR: 140 dB typical
PSRR: 130 dB typical
Ultralow input bias current: 10 pA typical
Low supply current: 750 μA per op amp
Overload recovery time: 50 μs
No external capacitors required
NC
1
–IN A
2
+IN A
3
TOP VIEW
6
(Not to Scale)
V–
4
5
8
AD8571
NC
7
V+
OUT A
NC
NC = NO CONNECT
Figure 1. 8-Lead MSOP (RM Suffix)
8
NC 1
–IN A 2
AD8571
NC
7
V+
6 OUT A
TOP VIEW
V– 4 (Not to Scale) 5 NC
NC = NO CONNECT
Figure 2. 8-Lead SOIC (R Suffix)
8
V+
–IN A
2
AD8572
7
OUT B
+IN A
3
TOP VIEW
(Not to Scale)
6
–IN B
V–
4
5
+IN B
01104-002
OUT A 1
Temperature sensors
Pressure sensors
Precision current sensing
Strain gage amplifiers
Medical instrumentation
Thermocouple amplifiers
Figure 3. 8-Lead TSSOP (RU Suffix)
2
+IN A 3
This family of amplifiers has ultralow offset, drift, and bias
current. The AD8571/AD8572/AD85741 are single, dual, and
quad amplifiers, respectively, featuring rail-to-rail input and
output swings. All are guaranteed to operate from 2.7 V to 5 V
single supply.
The AD8571/AD8572/AD8574 provide benefits previously
found only in expensive auto-zeroing or chopper-stabilized
amplifiers. Using Analog Devices, Inc., topology, these zerodrift amplifiers combine low cost with high accuracy. (No
external capacitors are required.) Using a spread-spectrum,
auto-zero technique, the AD8571/AD8572/AD8574 eliminate
the intermodulation effects from interaction of the chopping
function with the signal frequency in ac applications.
V+
7
OUT B
TOP VIEW
(Not to Scale)
6
–IN B
5
+IN B
4
Figure 4. 8-Lead SOIC (R Suffix)
OUT A 1
14
OUT D
–IN A 2
13
–IN D
12
+IN D
+IN A 3
V+ 4
+IN B 5
AD8574
11 V–
TOP VIEW
(Not to Scale) 10 +IN C
–IN B 6
9
–IN C
OUT B 7
8
OUT C
Figure 5. 14-Lead TSSOP (RU Suffix)
OUT A 1
14 OUT D
13 –IN D
–IN A 2
+IN A 3
V+ 4
+IN B 5
AD8574
12 +IN D
11 V–
TOP VIEW
(Not to Scale) 10 +IN C
–IN B 6
With an offset voltage of only 1 μV and drift of 0.005 μV/°C, the
AD8571/AD8572/AD8574 are perfectly suited for applications
where error sources cannot be tolerated. Position and pressure
sensors, medical equipment, and strain gage amplifiers benefit
greatly from nearly zero drift over their operating temperature
range. Many more systems require the rail-to-rail input and
output swings provided by the AD8571/AD8572/AD8574.
Protected by U.S. Patent 6,130,578.
01104-003
GENERAL DESCRIPTION
V–
8
AD8572
01104-005
OUT A 1
–IN A
Rev. F
01104-004
+IN A 3
APPLICATIONS
1
01104-001
FEATURES
9
–IN C
OUT B 7
8
OUT C
01104-006
Data Sheet
Zero-Drift, Single-Supply, Rail-to-Rail
Input/Output Operational Amplifiers
AD8571/AD8572/AD8574
Figure 6. 14-Lead SOIC (R Suffix)
The AD8571/AD8572/AD8574 are specified for the extended
industrial/ automotive temperature range (−40°C to +125°C).
The AD8571 single amplifier is available in 8-lead MSOP and
narrow SOIC packages. The AD8572 dual amplifier is available in
8-lead narrow SOIC and surface-mount TSSOP packages. The
AD8574 quad amplifier is available in 14-lead narrow SOIC and
TSSOP packages.
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 ©1999–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
