TMP75: The First Sample Triggers the Alert PIN and is then Cleared

We are using four TMP75AIDGKT  temperature sensors on our current design which have their Alert signals (pin 3) connected to a single wire net. We seem to be experiencing an occasional erroneous ALERT signal for the very first temperature sample after power up.

I’ve measured this occurrence to approximately 1 in 10000 power ups on average whilst the board is at room temperature and no warmer than 35 Celsius. This can  be as many as 30,000 cycles and as low as a few hundred power cycles in any given test run, it seems to be a very random event.

The TMP75 is starting with its default values and so it would require the measured temperature to exceed 80C for the Alert pin to become active. No I2C reads/writes or MCU activity to the device take place until after this Alert Event has occurred.

I’ve attached a plot of the captured Alert Signal (Blue and Red Traces) to this thread below.

Would it be possible for the ADC inside this device to pass on a bad reading on rare occasions (due to environmental noise) and cause the Alert to be active for the 1st sample after power up?

Thanks