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AD22057R-REEL データシート(PDF) 1 Page - Analog Devices |
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AD22057R-REEL データシート(HTML) 1 Page - Analog Devices |
1 / 8 page FUNCTIONAL BLOCK DIAGRAM AD22057 OUT GND IN+ IN– +VS OFS A1 A2 A1 A2 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 Single-Supply Sensor Interface Amplifier AD22057 GENERAL DESCRIPTION The AD22057 is a single-supply difference amplifier for ampli- fying and low-pass filtering small differential voltages (typically 100 mV FS at a gain of 40) from sources having a large common- mode voltage. Supply voltages from +3.0 V to +36 V can be used. The input common-mode range extends from below ground to +24 V using FEATURES Gain of 20. Alterable from 1 to 160 Input CMR from Below Ground to 6 (VS – 1 V) Output Span 20 mV to (VS – 0.2) V 1-, 2-, 3-Pole Low-Pass Filtering Available Accurate Midscale Offset Capability Differential Input Resistance 400 k Drives 1 k Load to +4 V Using VS = +5 V Supply Voltage: +3.0 V to +36 V Transient Spike Protection and RFI Filters Included Peak Input Voltage (40 ms): 60 V Reversed Supply Protection: –34 V Operating Temperature Range: –40 C to +125 C APPLICATIONS Current Sensing Motor Control Interface for Pressure Transducers, Position Indicators, Strain Gages, and Other Low Level Signal Sources Accelerometers a +5 V supply with excellent rejection of this common-mode voltage. This is achieved by the use of a special resistive attenua- tor at the input, laser trimmed to a very high differential balance. Provisions are included for optional low-pass filtering and gain adjustment. An accurate midscale offset feature allows bipolar signals to be amplified. AD22057 SINGLE-POLE LOW-PASS FILTERING, GAIN: 40 POWER DARLINGTON 100m 200k C +5V ANALOG OUTPUT 4V PER AMP CORNER FREQUENCY = 0.796Hz- F ANALOG GROUND SOLENOID LOAD +VS (CAR BATTERY) CMOS DRIVER CHASSIS Figure 1. Typical Application Circuit for a Current Sensor Interface 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., 1999 |
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