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AD8209

Analog Devices
Part Number AD8209
Manufacturer Analog Devices
Description Precision Difference Amplifier
Published Dec 17, 2009
Detailed Description Data Sheet FEATURES ±8000 V HBM ESD for shunt-based applications AEC-Q100 qualified EMI filters included High common-mod...
Datasheet PDF File AD8209 PDF File

AD8209
AD8209

Overview
Data Sheet FEATURES ±8000 V HBM ESD for shunt-based applications AEC-Q100 qualified EMI filters included High common-mode voltage range −2 V to +45 V operating −24 V to +80 V survival Buffered output voltage Gain = 14 V/V Low-pass filter (single-pole or two-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 Qualified for automotive applications APPLICATIONS High-side current sensing Motor controls Solenoid controls Power management Low-side current sensing Diagnostic protection GENERAL DESCRIPTION The AD8209 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 AD8209 is qualified per AEC-Q100 specifications.
The amplifier offers enhanced input overvoltage and ESD protection, and includes EMI filtering.
Automotive applications demand robust, precision components for improved system control.
The AD8209 provides excellent ac and dc High Voltage, Precision Difference Amplifier AD8209 FUNCTIONAL BLOCK DIAGRAM VS A1 A2 EMI FILTER IN+ EMI FILTER + G=7 IN– EMI FILTER – AD8209 + G=2 – OUT 08461-001 GND Figure 1.
performance, minimizing errors in the application.
Typical offset and gain drift in the MSOP package 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 AD8209 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 14.
Rev.
C Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable.
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