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AD8574

更新时间： 2024-11-03 22:50:03
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亚德诺 - ADI 运算放大器
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19页 250K
描述
Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifiers

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中文翻译

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AD8574 数据手册

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Zero-Drift, Single-Supply, Rail-to-Rail  
Input/Output Operational Amplifiers  
a
AD8571/AD8572/AD8574  
PIN CONFIGURATIONS  
FEATURES  
Low Offset Voltage: 1 ␮V  
8-Lead MSOP  
(RM Suffix)  
8-Lead SOIC  
(R Suffix)  
Input Offset Drift: 0.005 ␮V/؇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 ␮A/Op Amp  
Overload Recovery Time: 50 ␮s  
No External Capacitors Required  
NC  
؊IN A  
؉IN A  
V؊  
1
8
NC  
1
2
3
4
NC  
؊IN A  
+IN A  
V؊  
8
7
6
5
NC  
V+  
OUT A  
AD8571  
V+  
NC  
4
5
AD8571  
OUT A  
NC  
NC = NO CONNECT  
NC = NO CONNECT  
APPLICATIONS  
Temperature Sensors  
Pressure Sensors  
Precision Current Sensing  
Strain Gage Amplifiers  
Medical Instrumentation  
Thermocouple Amplifiers  
8-Lead TSSOP  
(RU Suffix)  
8-Lead SOIC  
(R Suffix)  
1
8
5
OUT A  
؊IN A  
+IN A  
V؊  
V+  
OUT B  
؊IN B  
+IN B  
1
2
3
4
8
7
6
5
OUT A  
؊IN A  
+IN A  
V؊  
V+  
AD8572  
4
OUT B  
؊IN B  
+IN B  
AD8572  
GENERAL DESCRIPTION  
This new family of amplifiers has ultralow offset, drift and bias  
current. The AD8571, AD8572 and AD8574 are single, dual and  
quad amplifiers featuring rail-to-rail input and output swings. All  
are guaranteed to operate from 2.7 V to 5 V single supply.  
14-Lead SOIC  
(R Suffix)  
14-Lead TSSOP  
(RU Suffix)  
The AD857x family provides the benefits previously found only in  
expensive autozeroing or chopper-stabilized amplifiers. Using Analog  
Devices’ new topology these new zero-drift amplifiers combine low  
cost with high accuracy. (No external capacitors are required.) In  
addition, using a patented spread-spectrum autozero technique, the  
AD857x family virtually eliminates the intermodulation effects from  
interaction of the chopping function with the signal frequency in ac  
applications.  
OUT A  
؊IN A  
؉IN A  
V؉  
؉N B  
؊IN B  
1
OUT D  
؊IN D  
؉IN D  
V؊  
؉IN C  
؊IN C  
OUT C  
14  
OUT A  
OUT D  
؊IN D  
+IN D  
V؊  
1
2
3
4
5
6
7
14  
13  
12  
11  
10  
9
؊IN A  
+IN A  
V+  
AD8574  
OUT B  
7
8
AD8574  
+IN B  
؊IN B  
OUT B  
+IN C  
؊IN C  
OUT C  
With an offset voltage of only 1 µV and drift of 0.005 µV/°C, the  
AD8571 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.  
8
The AD857x family is specified for the extended industrial/automotive  
(–40°C to +125°C) temperature range. The AD8571 single is  
available in 8-lead MSOP and narrow 8-lead SOIC packages. The  
AD8572 dual amplifier is available in 8-lead narrow SO and 8-lead  
TSSOP surface mount packages. The AD8574 quad is available in  
narrow 14-lead SOIC and 14-lead TSSOP packages.  
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  
which may result from its use. No license is granted by implication or  
otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781/329-4700  
Fax: 781/326-8703  
World Wide Web Site: http://www.analog.com  
© Analog Devices, Inc., 1999  
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