SBOS848B December 2017 – October 2019 INA381
The onboard comparator in the INA381 is designed to reduce the possibility of oscillations in the alert output when the measured signal level is near the overlimit threshold level as a result of noise. When the voltage (VCMPIN) exceeds the voltage developed at the CMPREF pin, the ALERT pin asserts and pulls low. The output voltage must drop to less than the CMPREF pin threshold voltage, as shown in Figure 44, by the hysteresis level of 50 mV so that the ALERT pin deasserts and returns to the nominal high state. The INA381 is designed with a hysteresis of 50 mV.