Analog Devices AD8418A Bidirectional,
Zero Drift Current Sense Amplifier
Analog Devices AD8418A Bidirectional, Current Sense Amplifier is a high voltage, high resolution current shunt amplifier featuring an initial gain of 20 V/V, with a maximum ±0.2% gain error. Qualified for automotive applications, the device provides breakthrough performance throughout the −40°C to +125°C operating temperature range. The EMI filters and patented circuitry enable output accuracy with pulse-width modulation (PWM) type input common-mode voltages. AD8418A offers a typical input offset voltage of ±200 μV and an excellent input common-mode rejection ratio of 86 dB, dc to 10 kHz from −2 V to +70 V. The zero drift core leads to a typical offset drift of 0.1 μV/°C throughout the operating temperature and the common-mode voltage range. The design makes the AD8418A Current Sense Amplifier ideal for performing bidirectional current measurements across a shunt resistor in a variety of automotive and industrial applications including motor control, power management, and solenoid control.