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AD8574_15

更新时间： 2024-09-24 01:14:15
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亚德诺 - ADI /
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Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifiers

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AD8574_15 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  
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: 145 dB typical  
V+  
TOP VIEW  
OUT A  
NC  
(Not to Scale)  
NC = NO CONNECT  
Figure 1. 8-Lead MSOP (RM Suffix)  
CMRR: 140 dB typical  
PSRR: 130 dB typical  
NC  
–IN A  
+IN A  
V–  
1
2
3
4
8
7
6
5
NC  
Ultralow input bias current: 10 pA typical  
Low supply current: 750 μA per op amp  
Overload recovery time: 50 μs  
No external capacitors required  
V+  
AD8571  
OUT A  
NC  
TOP VIEW  
(Not to Scale)  
NC = NO CONNECT  
Figure 2. 8-Lead SOIC (R Suffix)  
APPLICATIONS  
1
2
3
4
8
7
6
5
OUT A  
–IN A  
+IN A  
V–  
V+  
Temperature sensors  
Pressure sensors  
Precision current sensing  
Strain gage amplifiers  
Medical instrumentation  
Thermocouple amplifiers  
AD8572  
OUT B  
–IN B  
+IN B  
TOP VIEW  
(Not to Scale)  
Figure 3. 8-Lead TSSOP (RU Suffix)  
1
2
3
4
8
7
6
5
OUT A  
–IN A  
+IN A  
V–  
V+  
AD8572  
OUT B  
–IN B  
+IN B  
TOP VIEW  
(Not to Scale)  
GENERAL DESCRIPTION  
Figure 4. 8-Lead SOIC (R Suffix)  
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.  
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–  
AD8574  
TOP VIEW  
(Not to Scale)  
+IN B  
–IN B  
OUT B  
10 +IN C  
9
8
–IN C  
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.  
OUT C  
Figure 5. 14-Lead TSSOP (RU Suffix)  
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–  
AD8574  
TOP VIEW  
(Not to Scale)  
+IN B  
–IN B  
OUT B  
10 +IN C  
9
8
–IN C  
OUT C  
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.  
Figure 6. 14-Lead SOIC (R Suffix)  
The AD857x family is 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.  
Rev. E  
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 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  
www.analog.com  
Fax: 781.461.3113 ©1999–2011 Analog Devices, Inc. All rights reserved.  
 
 
 
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