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AD629BNZ

更新时间： 2024-11-23 04:04:11
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16页 533K
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High Common-Mode Voltage, Difference Amplifier

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High Common-Mode Voltage,  
Difference Amplifier  
AD629  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
Improved replacement for: INA117P and INA117KU  
±270 V common-mode voltage range  
Input protection to  
±±00 V common mode  
±±00 V differential mode  
21.1kΩ  
380kΩ  
380kΩ  
380kΩ  
8
7
6
5
NC  
+V  
1
2
3
4
REF(–)  
–IN  
S
+IN  
OUTPUT  
REF(+)  
20kΩ  
–V  
S
Wide power supply range (±2.± V to ±18 V)  
±10 V output swing on ±12 V supply  
1 mA maximum power supply current  
AD629  
NC = NO CONNECT  
Figure 1.  
GENERAL DESCRIPTION  
HIGH ACCURACY DC PERFORMANCE  
3 ppm maximum gain nonlinearity (AD629B)  
20 μV/°C maximum offset drift (AD629A)  
10 μV/°C maximum offset drift (AD629B)  
10 ppm/°C maximum gain drift  
The AD629 is a difference amplifier with a very high input,  
common-mode voltage range. It is a precision device that allows  
the user to accurately measure differential signals in the  
presence of high common-mode voltages up to ±2ꢀ7 ꢁ.  
The AD629 can replace costly isolation amplifiers in  
applications that do not require galvanic isolation. The device  
operates over a ±2ꢀ7 ꢁ common-mode voltage range and has  
inputs that are protected from common-mode or differential  
mode transients up to ±±77 ꢁ.  
EXCELLENT AC SPECIFICATIONS  
77 dB minimum CMRR @ ±00 Hz (AD629A)  
86 dB minimum CMRR @ ±00 Hz (AD629B)  
±00 kHz bandwidth  
The AD629 has low offset, low offset drift, low gain error drift,  
low common-mode rejection drift, and excellent CMRR over a  
wide frequency range.  
APPLICATIONS  
High voltage current sensing  
Battery cell voltage monitors  
Power supply current monitors  
Motor controls  
The AD629 is available in low cost, 8-lead PDIP and 8-lead  
SOIC packages. For all packages and grades, performance is  
guaranteed over the industrial temperature range of −47°C to  
+8±°C.  
Isolation  
100  
95  
90  
85  
80  
75  
70  
65  
60  
55  
50  
2mV/DIV  
60V/DIV  
–240  
–120  
0
120  
240  
20  
100  
1k  
10k 20k  
COMMON-MODE VOLTAGE (V)  
FREQUENCY (Hz)  
Figure 3. Error Voltage vs. Input Common-Mode Voltage  
Figure 2. Common-Mode Rejection Ratio vs. Frequency  
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 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 ©1999-2007 Analog Devices, Inc. All rights reserved.  
 
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AD629BNZ 替代型号

型号 品牌 替代类型 描述 数据表
AD629BN ADI

完全替代

 High Common-Mode Voltage Difference Amplifier
AD629ANZ ADI

类似代替

 High Common-Mode Voltage, Difference Amplifier
AD629BRZ ADI

功能相似

 High Common-Mode Voltage, Difference Amplifier

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