高分辨率，零漂移电流分流监控器 High Resolution, Zero-Drift Current Shunt Monitor
GENERAL DESCRIPTION
The AD8217 is a high voltage, high-resolution current shunt amplifier. It features a set gain of 20 V/V, with a maximum ±0.35% gain error over the entire temperature range. The buffered output voltage directly interfaces with any typical converter. The AD8217 offers excellent common-mode rejection from 4.5 V to 80 V, and includes an internal LDO, which directly powers the device from the high voltage rail. Therefore, no additional supply is necessary, provided that the input common-mode range is 4.5 V to 80 V. The AD8217 performs unidirectional current measurements across a shunt resistor in a variety of industrial and telecom applications including motor control, battery management, and base station power amplifier bias control.
FEATURES
High common-mode voltage range
4.5 V to 80 V operating
0 V to 85 V survival
Buffered output voltage
Wide operating temperature range: −40°C to +125°C
Excellent ac and dc performance
±100 nV/°C typical offset drift
±100 µV/°C typical offset
±5 ppm/°C typical gain drift
100 dB typical CMRR at dc
APPLICATIONS
High side current sensing
48 V telecom
Power management
Base stations
Unidirectional motor control
Precision high voltage current sources