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TMP432: How the temperature is linked to the transistor collector current

Art Mecina
Genius 16655 points
Part Number: TMP432

Hi Team,

Good day.

Our customer is currently using the TMP432ADGST with the MMBT3906 transistor to measure the temperature. Could you shed some light on how the temperature is linked to the transistor collector current?

The table 1 in the TMP432ADGST datasheet shows binary value and their corresponding temperature. Are these values correct with any transistor?

Thanks in advance!

Art

  • 0
    TI__Expert 6820 points

    Hi Art,

    Art Mecina said:
    Could you shed some light on how the temperature is linked to the transistor collector current?

    Please see section 1.1 and 1.2 of this app note.

    www.ti.com/.../sboa173a.pdf

    Art Mecina said:
    The table 1 in the TMP432ADGST datasheet shows binary value and their corresponding temperature. Are these values correct with any transistor?

    These values are correct with most BJTs, however there are some sources of errors that are highlighted in the above app note as well.  

    Thanks,

    David