Current sense amplifier combines zero drift and high bandwidth
Analog Devices has announced the latest addition to its current sense amplifier product range. According to the company, the AD8218 offers design engineers a precision current sense amplifier with the combination of high bandwidth and the lowest drift currently available in the market in a low cost package.
Using a proprietary cmos process, the device features a zero drift core which ADI claims provides an offset drift of + 100n V/°C over a -40 to 125 °C temperature range, while maintaining a typical small signal bandwidth of 500kHz.
The amplifier also has a 20 V/V fixed gain with a maximum ±0.35% gain error over the entire temperature range. Its input common mode can vary from 4 to 80V and includes a built in reference for optimal dynamic range in unidirectional current monitoring or the ability to easily offset the output for bidirectional current sensing.
