參數(shù)資料
型號(hào)： AD629-EVAL
廠商： Analog Devices, Inc.
元件分類： 運(yùn)動(dòng)控制電子
英文描述： High Common-Mode Voltage, Difference Amplifier
中文描述： 高共模電壓，差分放大器
文件頁(yè)數(shù)： 1/16頁(yè)
文件大?。?/td> 415K
代理商： AD629-EVAL
High Common-Mode Voltage,
Difference Amplifier
AD629
FEATURES
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 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: 781.461.3113
1999-2007 Analog Devices, Inc. All rights reserved.
www.analog.com
Improved replacement for: INA117P and INA117KU
±270 V common-mode voltage range
Input protection to
±500 V common mode
±500 V differential mode
Wide power supply range (±2.5 V to ±18 V)
±10 V output swing on ±12 V supply
1 mA maximum power supply current
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
EXCELLENT AC SPECIFICATIONS
77 dB minimum CMRR @ 500 Hz (AD629A)
86 dB minimum CMRR @ 500 Hz (AD629B)
500 kHz bandwidth
APPLICATIONS
High voltage current sensing
Battery cell voltage monitors
Power supply current monitors
Motor controls
Isolation
FUNCTIONAL BLOCK DIAGRAM
1
2
3
4
8
7
6
5
21.1k
380k
380k
380k
20k
REF(–)
–IN
+IN
–V
S
NC
+V
S
OUTPUT
REF(+)
AD629
NC = NO CONNECT
Figure 1.
0
GENERAL DESCRIPTION
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 ±270 V.
The AD629 can replace costly isolation amplifiers in
applications that do not require galvanic isolation. The device
operates over a ±270 V common-mode voltage range and has
inputs that are protected from common-mode or differential
mode transients up to ±500 V.
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.
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 40°C to
+85°C.
FREQUENCY (Hz)
C
100
50
55
60
65
70
75
80
85
90
95
20
100
1k
10k
20k
0
Figure 2. Common-Mode Rejection Ratio vs. Frequency
COMMON-MODE VOLTAGE (V)
O
–240
240
120
–120
0
0
2mV/DIV
60V/DIV
Figure 3. Error Voltage vs. Input Common-Mode Voltage
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