Figure 7-1 shows the basic connections of the INA185. Connect the input pins (IN+ and IN–) to the shunt resistor as close as possible to minimize any resistance in series with the shunt resistor.

NOTE: To help eliminate ground offset errors between the device and the analog-to-digital converter (ADC), connect the REF pin to the ADC reference input and then to ground. For best performance, use an RC filter between the output of the INA185 and the ADC. See the Closed-Loop Analysis of Load-Induced Amplifier Stability Issues Using ZOUT application note for more details.

Figure 7-1 Basic Connections for the INA185

A power-supply bypass capacitor of at least 0.1 µF is required for proper operation. Applications with noisy or high-impedance power supplies can require additional decoupling capacitors to reject power-supply noise. Connect bypass capacitors close to the device pins.