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AD629A Folha de dados(PDF) 1 Page - Analog Devices |
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AD629A Folha de dados(HTML) 1 Page - Analog Devices |
1 / 12 page REV. A 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. a AD629 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2000 High Common-Mode Voltage Difference Amplifier FEATURES Improved Replacement for: INA117P and INA117KU 270 V Common-Mode Voltage Range Input Protection to: 500 V Common Mode 500 V Differential Wide Power Supply Range ( 2.5 V to 18 V) 10 V Output Swing on 12 V Supply 1 mA Max Power Supply Current HIGH ACCURACY DC PERFORMANCE 3 ppm Max Gain Nonlinearity 20 V/ C Max Offset Drift (AD629A) 10 V/ C Max Offset Drift (AD629B) 10 ppm/ C Max Gain Drift EXCELLENT AC SPECIFICATIONS 77 dB Min CMRR @ 500 Hz (AD629A) 86 dB Min CMRR @ 500 Hz (AD629B) 500 kHz Bandwidth APPLICATIONS High Voltage Current Sensing Battery Cell Voltage Monitor Power Supply Current Monitor Motor Control Isolation FUNCTIONAL BLOCK DIAGRAM 8-Lead Plastic Mini-DIP (N) and SOIC (R) Packages 1 2 3 4 8 7 6 5 21.1k 380k 380k 380k 20k REF(–) –IN +IN –VS NC +VS OUTPUT REF(+) AD629 NC = NO CONNECT 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 will operate 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, as well as low common-mode rejection drift, and excellent CMRR over a wide frequency range. The AD629 is available in low-cost, plastic 8-lead DIP and SOIC packages. For all packages and grades, performance is guaranteed over the entire industrial temperature range from –40 °C to +85°C. FREQUENCY – Hz 100 50 20 100 1k 10k 20k 95 90 85 80 75 70 65 60 55 Figure 1. Common-Mode Rejection Ratio vs. Frequency 60V/DIV 2mV/DIV –240 –120 0 120 240 COMMON-MODE VOLTAGE – Volts Figure 2. Common-Mode Operating Range. Error Voltage vs. Input Common-Mode Voltage |
Nº de peça semelhante - AD629A |
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Descrição semelhante - AD629A |
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