TMP451-Q1: OPEN detection and ADC conversion

Tool/software:

Hi expert,

Customer has further questions about open detection and ADC conversion related to the original e2e post: 

TMP451-Q1: TMP451 detects OPEN FAULT after initialization - Sensors forum - Sensors - TI E2E support forums

Questions:

In previous fault occurrences, the status register (0x02) value read was 0x84 (1000 0100). The status register BIT 7 (BUSY bit ) is described as: “The BUSY bit = 1 if the ADC is making a conversion. This bit is set to 0 if the ADC is not converting.”

I am confused about the BUSY bit:

1. What does this bit (indicating ADC conversion status) mean, or what can it be used for?
2. If the ADC is converting, will it affect temperature/status readings? Are the readings reliable in this state?
3. I believe OPEN detection works in real-time, no need to wait for the previous ADC conversion to finish, correct? Is this detection still active during device shutdown (Shutting down all device circuitry except the serial interface)? Is there any chance that data conversion/detection logic are affected during shutting down?

Thank you for your help!

Best,

Jiahao