SBOS318B April 2019 – July 2021 INA186
The low input bias current of the INA186 allows accurate monitoring of small-value currents. To accurately monitor currents in the microamp range, increase the value of the sense resistor to increase the sense voltage so that the error introduced by the offset voltage is small. Figure 8-6 shows the circuit configuration for monitoring low-value currents. As a result of the differential input impedance of the INA186, limit the value of RSENSE to 1 kΩ or less for best accuracy.