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AD8203YRMZ-R7 データシート(PDF) 1 Page - Analog Devices |
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AD8203YRMZ-R7 データシート(HTML) 1 Page - Analog Devices |
1 / 20 page High Common-Mode Voltage, Single-Supply Difference Amplifier AD8203 Rev. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. 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 © 2005 Analog Devices, Inc. All rights reserved. FEATURES High common-mode voltage range −6 V to +30 V at a 5 V supply voltage Operating temperature range: −40°C to +125°C Supply voltage range: 3.5 V to 12 V Low-pass filter (1-pole or 2-pole) Excellent ac and dc performance ±1 mV voltage offset (8-lead SOIC) ±1 ppm/°C typical gain drift 80 dB CMRR minimum dc to 10 kHz APPLICATIONS Transmission control Diesel injection control Engine management Adaptive suspension control Vehicle dynamics control GENERAL DESCRIPTION The AD8203 is a single-supply difference amplifier for amplify- ing and low-pass filtering small differential voltages in the presence of a large common-mode voltage (CMV). The input CMV range extends from −6 V to +30 V at a typical supply voltage of 5 V. The AD8203 is available in die and packaged form. The MSOP and SOIC packages are specified over a wide temperature range, from −40°C to +125°C, while the die is specified over a wider temperature range, from −40°C to +150°C, making the AD8203 well-suited for use in many automotive platforms. Automotive platforms demand precision components for better system control. The AD8203 provides excellent ac and dc performance keeping errors to a minimum in the user’s system. Typical offset and gain drift in the SOIC package are 0.3 μV/°C and 1 ppm/°C, respectively. Typical offset and gain drift in the MSOP package are 2 μV/°C and 1 ppm/°C, respectively. The device also delivers a minimum CMRR of 80 dB from dc to 10 kHz. The AD8203 features an externally accessible 100 kΩ resistor at the output of the Preamp A1, which can be used for low-pass filter applications and for establishing gains other than 14. FUNCTIONAL BLOCK DIAGRAMS A1 +IN –IN 200k Ω 200k Ω 100k Ω A2 +IN –IN G = ×7 G = ×2 AD8203 10k Ω 10k Ω +IN –IN GND OUT NC A1 A2 +VS NC = NO CONNECT 2 5 7 4 6 8 1 3 Figure 1. Functional Block Diagram GND NC –IN +IN A1 +VS A2 OUT AD8203 5V OUTPUT INDUCTIVE LOAD POWER DEVICE 4-TERM SHUNT CLAMP DIODE BATTERY 14V COMMON NC = NO CONNECT Figure 2. High Line Current Sensor GND NC –IN +IN A1 +VS A2 OUT AD8203 5V OUTPUT INDUCTIVE LOAD POWER DEVICE 4-TERM SHUNT CLAMP DIODE BATTERY 14V COMMON NC = NO CONNECT Figure 3. Low Line Current Sensor |
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