SBOS844C May 2021 – March 2023 INA234
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
Figure 8-3 shows the ALERT pin response to a shunt overvoltage limit of 72 mV for a conversion time (tCT) of 140 µs and averaging set to 1. Figure 8-4 shows the response for the same limit but with the conversion time increased to 1.1 ms. For the scope shots shown in these figures, persistence was enabled on the ALERT channel. Figure 8-3 and Figure 8-4 show how the ALERT response time can vary depending on when the fault condition occurs relative to the internal ADC clock of the INA234. For fault conditions that are just exceeding the limit threshold, the response time for the ALERT pin can vary from one to two conversion cycles. As mentioned previously, the variation is because of the timing on when the fault event occurs relative to the start time of the internal ADC conversion cycle. For fault events that greatly exceed the limit threshold, the alert can respond in less than one conversion cycle.