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TMP117: At negative temperature, sensor returns value with an offset of 512.

Keshav Goel
Prodigy 10 points
Part Number: TMP117

So, if air temperature is 5 degrees C, sensor returns 5. But if the air temperature is -5 degree C, it returns ( 512 + (-5) ) i.e. 507. 

  • 0
    TI__Expert 6095 points

    Hi,

    Thanks for posting to the sensors forum.

    The temperature data in the result register is in two's complement format (see excerpt from datasheet below). A temperature of -5*C will have a binary value of 1111 1101 1000 0000 or a hex value of 0xFD80. 

    Best regards,

    Jesse