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AD8571_06

更新时间： 2024-11-24 04:31:07
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Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifiers

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AD8571_06 数据手册

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Zero-Drift, Single-Supply, Rail-to-Rail  
Input/Output Operational Amplifiers  
AD8571/AD8572/AD8574  
FEATURES  
PIN CONFIGURATIONS  
Low offset voltage: 1 μV  
1
2
3
4
8
7
6
5
NC  
–IN A  
+IN A  
V–  
NC  
NC  
–IN A  
+IN A  
V–  
1
2
3
4
8
7
6
5
NC  
AD8571  
Input offset drift: 0.005 μV/°C  
Rail-to-rail input and output swing  
5 V/2.7 V single-supply operation  
High gain, CMRR, PSRR: 130 dB  
Ultralow input bias current: 20 pA  
Low supply current: 750 μA/op amp  
Overload recovery time: 50 μs  
No external capacitors required  
V+  
V+  
AD8571  
TOP VIEW  
OUT A  
NC  
OUT A  
NC  
TOP VIEW  
(Not to Scale)  
(Not to Scale)  
NC = NO CONNECT  
NC = NO CONNECT  
Figure 1. 8-Lead MSOP  
(RM Suffix)  
Figure 2. 8-Lead SOIC  
(R Suffix)  
1
2
3
4
8
7
6
5
OUT A  
–IN A  
+IN A  
V–  
V+  
1
2
3
4
8
7
6
5
OUT A  
–IN A  
+IN A  
V–  
V+  
AD8572  
TOP VIEW  
(Not to Scale)  
AD8572  
TOP VIEW  
(Not to Scale)  
OUT B  
–IN B  
+IN B  
OUT B  
–IN B  
+IN B  
APPLICATIONS  
Temperature sensors  
Pressure sensors  
Precision current sensing  
Strain gage amplifiers  
Medical instrumentation  
Thermocouple amplifiers  
Figure 3. 8-Lead TSSOP  
(RU Suffix)  
Figure 4. 8-Lead SOIC  
(R Suffix)  
OUT A  
–IN A  
+IN A  
V+  
1
2
3
4
5
6
7
14 OUT D  
OUT A  
–IN A  
+IN A  
V+  
1
2
3
4
5
6
7
14 OUT D  
13 –IN D  
12 +IN D  
11 V–  
13 –IN D  
12 +IN D  
11 V–  
AD8574  
TOP VIEW  
(Not to Scale)  
AD8574  
TOP VIEW  
(Not to Scale)  
GENERAL DESCRIPTION  
+IN B  
–IN B  
OUT B  
10 +IN C  
+IN B  
–IN B  
OUT B  
10 +IN C  
This family of amplifiers has ultralow offset, drift, and bias  
current. The AD8571, AD8572, and AD8574 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.  
9
8
–IN C  
9
8
–IN C  
OUT C  
OUT C  
Figure 5. 14-Lead TSSOP  
(RU Suffix)  
Figure 6. 14-Lead SOIC  
(R Suffix)  
The AD857x family provides benefits previously found only in  
expensive auto-zeroing or chopper-stabilized amplifiers. Using  
Analog Devices, Inc. topology, these zero-drift amplifiers  
combine low cost with high accuracy. (No external capacitors  
are required.) Using a patented spread-spectrum auto-zero  
technique, the AD857x family eliminates the intermodulation  
effects from interaction of the chopping function with the  
signal frequency in ac applications.  
The AD857x family is specified for the extended industrial/  
automotive (−40°C to +125°C) temperature range. The AD8571  
single amplifier is available in 8-lead MSOP and narrow 8-lead  
SOIC packages. The AD8572 dual amplifier is available in  
8-lead narrow SOIC and 8-lead TSSOP surface mount packages.  
The AD8574 quad amplifier is available in narrow 14-lead SOIC  
and 14-lead TSSOP packages.  
With an offset voltage of only 1 μV and drift of 0.005 μV/°C, the  
AD857x family is 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 AD857x family.  
Rev. B  
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 ofthird parties that may result fromits 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 registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2006 Analog Devices, Inc. All rights reserved.  
 
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