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TMP117: Accuracy when there is no averaging

Part Number: TMP117

Hi Team,

The E2E thread below confirmed that the temperature result has a repeatability of approximately ±3 LSBs when there is no averaging, Our customer would like to confirm if he sets the conversion period to 15.5 ms with no averaging, he will get a 0.1°C accuracy.

e2e.ti.com/.../tmp117-accuracy-of-sensor-with-different-configuration

Regards,

Danilo

  • Hi Danilo,

    The datasheet only specifies temperature accuracy with 8 averages and a 1 Hz conversion cycle, as shown in sections 6.5 and 6.9. As mentioned in the post referenced above, the overall device accuracy with conversion period set to 15.5 ms and no averaging will have similar accuracy, there will just be more noise in the measurements. Averaging helps to reduce noise in the conversion results. Figures 6-5 and 6-6 in the datasheet show the worst-case error due to noise to be ±3LSB, which is around 0.02343855°C.

    Best regards,

    Jesse