The INA290-Q1 is an ultra-precise current sense amplifier than canmeasure voltage drops across shunt resistors over a wide common-mode range from 2.7 V to 110 V. It is in a highly space-efficient SC-70package with a PCB footprint of only 2.00 mm × 1.25 mm. The ultra-precise current measurementaccuracy is achieved thanks to the combination of an ultra-low offset voltage of 25 µV (maximum), asmall gain error of 0.25% (maximum), and a high DC CMRR of 160 dB (typical). TheINA290-Q1 is not only designed for DC current measurement, but also for high-speedapplications (like fast overcurrent protection, for example) with a high bandwidth of 800 kHz (atgain of 20 V/V) and an 85-dB AC CMRR (at 50 kHz).
The INA290-Q1 operates from a single 2.7-V to 20-V supply and draws a350-µA supply current (typical). The INA290-Q1 is available with five gain options:20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. The low offset of the zero-drift architectureenables current sensing with low ohmic shunts as specified over the extended operating temperaturerange (−40°C to +125°C).