Although the INA19xA-Q1 family of devices are not designed for accurate operation in either of these regions, some applications are exposed to these conditions; for example, when monitoring power supplies that are switched on and off while V_S is still applied to the INA19xA-Q1. It is important to know what the behavior of the devices will be in these regions.

As V_SENSE approaches 0 mV, in these V_CM regions, the device output accuracy degrades. A larger-than-normal offset can appear at the current shunt monitor output with a typical maximum value of V_OUT = 300 mV for
V_SENSE = 0 mV. As V_SENSE approaches 20 mV, V_OUT returns to the expected output value with accuracy as specified in Electrical Characteristics. Figure 7-7 illustrates this effect using the INA195A and INA198A
(Gain = 100).

Figure 7-7 Example for Low V_SENSE Cases 1 and 3 (INA195A-Q1, INA198A-Q1: Gain = 100)