AD8417/18A Current Sense Amplifier

The ADI's AD8417 and AD8418A are high-voltage, high-resolution current shunt amplifiers. They feature an initial gain of 60 V/V and 20 V/V, with a maximum ±0.3% gain error over the entire temperature range. The buffered output voltage directly interfaces with any typical converter. The AD8417 offers excellent input common-mode rejection from -2 V to +70 V. The AD8417 performs bidirectional current measurements across a shunt resistor in a variety of automotive and industrial applications, including motor control, power management, and solenoid control.

The AD8417 and AD8418A offer breakthrough performance throughout the −40°C to +125°C temperature range. They feature a zero-drift core, which leads to a typical offset drift of 0.1 µV/°C throughout the operating temperature range and the common-mode voltage range. The AD8417 and AD8418A are qualified for automotive applications. The devices include EMI filters and patented circuitry to enable output accuracy with pulse-width modulation (PWM) type input common-mode voltages. The typical input offset voltage is ±200 µV. The AD8417 is offered in 8-lead MSOP and SOIC packages.