Catalog
High Voltage, Precision Difference Amplifier
Key Features
• ±8000 V HBM ESD for shunt-based applications
• AEC-Q100 qualified
• EMI filters included
• High common-mode voltage range−2 V to +50 V operating−20 V to +70 V survival
• −2 V to +50 V operating
• −20 V to +70 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
• Excellent ac and dc performance±1 mV voltage offset−5 ppm/°C typical gain drift80 dB CMRR minimum dc to 10 kHz
• ±1 mV voltage offset
• −5 ppm/°C typical gain drift
• 80 dB CMRR minimum dc to 10 kHz
• Qualified for automotive applications
Description
AI
The AD8209A 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 common-mode voltage range extends from −2 V to +50 V at a single 5 V supply. The AD8209A is qualified per AEC-Q100 specifications. The amplifier offers enhanced input overvoltage and ESD protection, and includes electromagnetic interference (EMI) filtering.Automotive applications demand robust, precision components for improved system control. The AD8209A provides excellent ac and dc performance, minimizing errors in the application. Typical offset and gain drift in the MSOP package are less than 5 μV/°C and −5 ppm/°C, respectively. The device also delivers a minimum common-mode rejection ratio (CMRR) of 80 dB from dc to 10 kHz.The AD8209A features an externally accessible 100 kΩ resistor at the output of the preamplifier (A1) that can be used for low-pass filtering and for establishing gains other than 14 V/V.ApplicationsHigh-side current sensingMotor controlsSolenoid controlsPower managementLow-side current sensingDiagnostic protection
