Datasheet AD8209A (Analog Devices)

High Voltage, Precision Difference Amplifier Data Sheet AD8209A FEATURES FUNCTIONAL BLOCK DIAGRAM ±8000 V HBM ESD for shunt-based applications VS A1 A2 AEC-Q100 qualified EMI AD8209A EMI filters included FILTER High common-mode voltage range +IN EMI + FILTER + −2 V to +50 V operating G = 7 G = 2 OUT EMI – −20 V to +70 V survival –IN – FILTER Buffered output voltage Gain = 14 V/V Low-pass filter (single-pole or two-pole) Wide operating temperature range: −40°C to +125°C
001 11-
GND Excellent ac and dc performance
145 Figure 1.
±1 mV typical 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 AD8209A is a single-supply difference amplifier ideal for Automotive applications demand robust, precision components for amplifying and low-pass filtering small differential voltages in the improved system control. The AD8209A provides excel ent ac and presence of a large common-mode voltage. The input common- dc performance, minimizing errors in the application. Typical mode voltage range extends from −2 V to +50 V at a single 5 V offset and gain drift in the MSOP package are less than 5 µV/°C supply. The AD8209A is qualified per AEC-Q100 specifications. and −5 ppm/°C, respectively. The device also delivers a minimum The amplifier offers enhanced input overvoltage and ESD common-mode rejection ratio (CMRR) of 80 dB from dc to protection, and includes electromagnetic interference (EMI) 10 kHz. filtering. The AD8209A features an external y 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.
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Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION APPLICATIONS INFORMATION HIGH-SIDE CURRENT SENSINGWITH A LOW-SIDE SWITCH HIGH RAIL CURRENT SENSING LOW-SIDE CURRENT SENSING 4 mA to 20 mA Current Loop Receiver GAIN ADJUSTMENT Gains Less than 14 Gains Greater than 14 GAIN TRIM Internal Signal Overload Considerations LOW-PASS FILTERING HIGH LINE CURRENT SENSING WITH LOW-PASS FILTERING AND GAIN ADJUSTMENT OUTLINE DIMENSIONS ORDERING GUIDE AUTOMOTIVE PRODUCTS