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AD8208

Analog Devices
Part Number AD8208
Manufacturer Analog Devices
Description Precision Difference Amplifier
Published Feb 12, 2015
Detailed Description Data Sheet FEATURES Qualified for automotive applications EMI filters included High common-mode voltage range −2 V to +4...
Datasheet PDF File AD8208 PDF File

AD8208
AD8208

Overview
Data Sheet FEATURES Qualified for automotive applications EMI filters included High common-mode voltage range −2 V to +45 V operating −24 V to +80 V survival Buffered output voltage Gain = 20 V/V Low-pass filter (1-pole or 2-pole) Wide operating temperature range −40°C to +125°C for WB grade −40°C to +150°C for WH grade Excellent ac and dc performance ±1 mV voltage offset −5 ppm/°C typical gain drift 80 dB CMRR minimum dc to 10 kHz APPLICATIONS High-side current sensing Motor controls Solenoid controls Power management Low-side current sensing Diagnostic protection GENERAL DESCRIPTION The AD8208 is a single-supply difference amplifier ideal for amplifying and low-pass filtering small differential voltages in the presence of a large common-mode voltage.
The input commonmode voltage range extends from −2 V to +45 V at a single +5 V supply.
The AD8208 is qualified for automotive applications.
The amplifier offers enhanced input overvoltage and ESD protection, and includes EMI filtering.
High Voltage, Precision Difference Amplifier AD8208 FUNCTIONAL BLOCK DIAGRAM VS A1 A2 EMI FILTER +IN EMI FILTER –IN EMI FILTER + G = 10 – AD8208 + G=2 – OUT 08714-001 GND Figure 1.
Automotive applications demand robust, precision components for improved system control.
The AD8208 provides excellent ac and dc performance, minimizing errors in the application.
Typical offset and gain drift in both the SOIC and MSOP packages are less than 5 µV/°C and 10 ppm/°C, respectively.
The device also delivers a minimum CMRR of 80 dB from dc to 10 kHz.
The AD8208 features an externally accessible 100 kΩ resistor at the output of the preamplifier (A1), which can be used for lowpass filtering and for establishing gains other than 20.
Rev.
C Document Feedback 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 ...


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