Datasheet AD629 (Analog Devices) Hersteller Analog Devices Beschreibung High Common-Mode Voltage, Difference Amplifier Seiten / Seite 16 / 1 — High Common-Mode Voltage,. Difference Amplifier. AD629. FEATURES. … Revision C Dateiformat / Größe PDF / 413 Kb Dokumentensprache Englisch
High Common-Mode Voltage,. Difference Amplifier. AD629. FEATURES. FUNCTIONAL BLOCK DIAGRAM
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Modelllinie für dieses Datenblatt Textversion des Dokuments High Common-Mode Voltage, Difference Amplifier AD629 FEATURES FUNCTIONAL BLOCK DIAGRAM Improved replacement for: INA117P and INA117KU 21.1kΩ 380kΩ ±270 V common-mode voltage range REF(–) 1 8 NC 380kΩ Input protection to –IN 2 7 +VS ±500 V common mode 380kΩ +IN 3 6 OUTPUT ±500 V differential mode 20kΩ –V 4 5 S REF(+) Wide power supply range (±2.5 V to ±18 V) AD629 01 0 3-±10 V output swing on ±12 V supply NC = NO CONNECT 078 01 mA maximum power supply current Figure 1. GENERAL DESCRIPTION HIGH ACCURACY DC PERFORMANCE 3 ppm maximum gain nonlinearity (AD629B) The AD629 is a difference amplifier with a very high input,20 μV/°C maximum offset drift (AD629A) common-mode voltage range. It is a precision device that allows10 μV/°C maximum offset drift (AD629B) the user to accurately measure differential signals in the10 ppm/°C maximum gain drift presence of high common-mode voltages up to ±270 V. The AD629 can replace costly isolation amplifiers inEXCELLENT AC SPECIFICATIONS applications that do not require galvanic isolation. The device77 dB minimum CMRR @ 500 Hz (AD629A) operates over a ±270 V common-mode voltage range and has86 dB minimum CMRR @ 500 Hz (AD629B) inputs that are protected from common-mode or differential500 kHz bandwidth mode transients up to ±500 V.APPLICATIONS The AD629 has low offset, low offset drift, low gain error drift, low common-mode rejection drift, and excellent CMRR over aHigh voltage current sensing wide frequency range.Battery cell voltage monitors The AD629 is available in die and packaged form featuringPower supply current monitors Motor controls 8-lead PDIP and 8-lead SOIC packages. For all packagesIsolation (including die) and grades, performance is guaranteed over the industrial temperature range of −40°C to +85°C.100 ) 2mV/DIV B 95 d ( O 90 ) TI A IV R 85 /D N IO 80 2mV CT R ( JE 75 RRO RE E E D 70 UT O P -M T 65 N U O O M 60 M CO 0355 02 0 060V/DIV 3- 3- 78 7850 00 0020 100 1k 10k 20k –240 –120 0 120 240 FREQUENCY (Hz) COMMON-MODE VOLTAGE (V) Figure 2. Common-Mode Rejection Ratio vs. Frequency Figure 3. Error Voltage vs. Input Common-Mode VoltageRev. 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. 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. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©1999-2011 Analog Devices, Inc. All rights reserved. Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION APPLICATIONS BASIC CONNECTIONS SINGLE-SUPPLY OPERATION SYSTEM-LEVEL DECOUPLING AND GROUNDING USING A LARGE SENSE RESISTOR OUTPUT FILTERING OUTPUT CURRENT AND BUFFERING A GAIN OF 19 DIFFERENTIAL AMPLIFIER ERROR BUDGET ANALYSIS EXAMPLE 1 ERROR BUDGET ANALYSIS EXAMPLE 2 OUTLINE DIMENSIONS ORDERING GUIDE