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AD8628_15

更新时间： 2024-11-24 01:16:15
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亚德诺 - ADI /
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24页 426K
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Zero-Drift, Single-Supply, Rail-to-Rail

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AD8628_15 数据手册

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Zero-Drift, Single-Supply, Rail-to-Rail  
Input/Output Operational Amplifier  
Data Sheet  
AD8628/AD8629/AD8630  
FEATURES  
PIN CONFIGURATIONS  
Lowest auto-zero amplifier noise  
Low offset voltage: 1 µV  
Input offset drift: 0.002 µV/°C  
Rail-to-rail input and output swing  
5 V single-supply operation  
OUT  
V–  
1
2
3
5
V+  
AD8628  
TOP VIEW  
(Not to Scale)  
+IN  
4
–IN  
Figure 1. 5-Lead TSOT (UJ-5) and 5-Lead SOT-23 (RJ-5)  
High gain, CMRR, and PSRR: 130 dB  
Very low input bias current: 100 pA maximum  
Low supply current: 1.0 mA  
NC  
–IN  
+IN  
V–  
1
2
3
4
8
7
6
5
NC  
V+  
Overload recovery time: 50 µs  
No external components required  
Qualified for automotive applications  
AD8628  
OUT  
NC  
TOP VIEW  
(Not to Scale)  
NC = NO CONNECT  
APPLICATIONS  
Figure 2. 8-Lead SOIC_N (R-8)  
Automotive sensors  
Pressure and position sensors  
Strain gage amplifiers  
Medical instrumentation  
Thermocouple amplifiers  
Precision current sensing  
Photodiode amplifiers  
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_N (R-8) and 8-Lead MSOP (RM-8)  
GENERAL DESCRIPTION  
1
2
3
4
5
6
7
14 OUT D  
13 –IN D  
12 +IN D  
11 V–  
OUT A  
–IN A  
+IN A  
V+  
This amplifier has ultralow offset, drift, and bias current.  
The AD8628/AD8629/AD8630 are wide bandwidth auto-zero  
amplifiers featuring rail-to-rail input and output swing 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).  
AD8630  
TOP VIEW  
(Not to Scale)  
+IN B  
–IN B  
OUT B  
10 +IN C  
9
8
–IN C  
OUT C  
The AD8628/AD8629/AD8630 provide 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 and low  
noise. No external capacitor is required. In addition, the AD8628/  
AD8629/AD8630 greatly reduce the digital switching noise  
found in most chopper-stabilized amplifiers.  
Figure 4. 14-Lead SOIC_N (R-14) and 14-Lead TSSOP (RU-14)  
The AD8628/AD8629/AD8630 are specified for the extended  
industrial temperature range (−40°C to +125°C). The AD8628  
is available in tiny 5-lead TSOT, 5-lead SOT-23, and 8-lead  
narrow SOIC plastic packages. The AD8629 is available in the  
standard 8-lead narrow SOIC and MSOP plastic packages. The  
AD8630 quad amplifier is available in 14-lead narrow SOIC and  
14-lead TSSOP plastic packages. See the Ordering Guide for  
automotive grades.  
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/AD8630 are 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 systems can take advantage of the rail-to-rail input and  
output swings provided by the AD8628/AD8629/AD8630 to  
reduce input biasing complexity and maximize SNR.  
Rev. K  
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  
rightsof third 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 andregisteredtrademarks 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 ©2002–2014 Analog Devices, Inc. All rights reserved.  
Technical Support  
www.analog.com  
 
 
 
 
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