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AD8629ARZ1

更新时间： 2024-11-17 22:05:51
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亚德诺 - ADI 运算放大器
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20页 640K
描述
Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier

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AD8629ARZ1 数据手册

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Zero-Drift, Single-Supply, Rail-to-Rail  
Input/Output Operational Amplifier  
AD8628/AD8629  
FEATURES  
PIN CONFIGURATIONS  
Lowest auto-zero amplifier noise  
Low offset voltage: 1 µV  
OUT  
V–  
1
2
3
5
V+  
AD8628  
TOP VIEW  
Input offset drift: 0.002 µV/°C  
Rail-to-rail input and output swing  
5 V single-supply operation  
High gain, CMRR, and PSRR: 120 dB  
Very low input bias current: 100 pA max  
Low supply current: 1.0 mA  
Overload recovery time: 10 µs  
No external components required  
(Not to Scale)  
+IN  
4
–IN  
Figure 1. 5-Lead TSOT (UJ-5)  
and 5-Lead SOT-23 (RT-5)  
NC  
–IN  
+IN  
V–  
1
2
3
4
8
7
6
5
NC  
V+  
AD8628  
OUT  
NC  
TOP VIEW  
(Not to Scale)  
NC = NO CONNECT  
APPLICATIONS  
Automotive sensors  
Figure 2. 8-Lead SOIC (R-8)  
Pressure and position sensors  
Strain gage amplifiers  
Medical instrumentation  
Thermocouple amplifiers  
Precision current sensing  
Photodiode amplifier  
OUT A  
–IN A  
+IN A  
V–  
1
2
3
4
8
7
6
5
V+  
AD8629  
OUT B  
–IN B  
+IN B  
TOP VIEW  
(Not to Scale)  
Figure 3. 8-Lead SOIC (R-8)  
OUT A  
–IN A  
+IN A  
V–  
1
2
3
4
8
7
6
5
V+  
AD8629  
OUT B  
–IN B  
+IN B  
TOP VIEW  
(Not to Scale)  
Figure 4. 8-Lead MSOP (RM-8)  
GENERAL DESCRIPTION  
This new breed of amplifier has ultralow offset, drift, and bias  
current. The AD8628/AD8629 are wide bandwidth auto-zero  
amplifiers featuring rail-to-rail input and output swings and low  
noise. Operation is fully specified from 2.7 V to 5 V single  
supply ( 1.35 V to 2.5 V dual supply).  
With an offset voltage of only 1 µV, drift of less than  
0.005 µV/°C, and noise of only 0.5 µV p-p (0 Hz to 10 Hz),  
the AD8628/AD8629 are perfectly suited for applications in  
which 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 systems can take advantage of the rail-to-rail input  
and output swings provided by the AD8628/AD8629 to reduce  
input biasing complexity and maximize SNR.  
The AD8628/AD8629 provide benefits previously found only in  
expensive auto-zeroing or chopper-stabilized amplifiers. Using  
Analog Devices’ new topology, these zero-drift amplifiers  
combine low cost with high accuracy and low noise. (No exter-  
nal capacitor is required.) In addition, the AD8628/AD8629  
greatly reduce the digital switching noise found in most  
chopper-stabilized amplifiers.  
The AD8628/AD8629 are specified for the extended industrial  
temperature range (−40°C to +125°C). The AD8628 is available  
in tiny TSOT-23, SOT-23, and the popular 8-lead narrow SOIC  
plastic packages. The AD8629 is available in the standard 8-lead  
narrow SOIC and MSOP plastic packages.  
Rev. C  
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  
Fax: 781.326.8703  
www.analog.com  
© 2004 Analog Devices, Inc. All rights reserved.  
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