Hi Experts,
My customer want to know the minimum time from TMP411 power up to read back the first temperature data. Do you know how to calculate it?
How to understand the conversion rate? If resolution is 9bits and conversion rate is 8, it means the time interval between two conversion is (125-12.5)=112.5ms, right? Thanks.
Arie
Hi Arie,
From the electrical characteristics section of the datasheet, the TMP411-Q1 has a conversion time of 115 ms (typical) per channel. The local and remote temperatures count as one channel each. This conversion time for the remote channel (12 bit) is fixed and cannot be changed.
For the local channel, the conversion time can change depending on the Resolution Register settings. From Table 7 in the datasheet, the local channel with 9 bits of resolution has a conversion time of 12.5 ms (typical).
One total conversion cycle (local + remote) will be 12.5 ms + 115 ms = 127.5 ms (typical). This time may vary of course with the min/max conversion time spec. The device will begin a temperature measurement as soon as it is able to at power-on.
With a conversion rate set to 8 conversions/sec, the device will take measurements as fast as it can, so a new conversion cycle (local and remote) should start over every 127.5 ms (typical).
Best regards,
Jesse
