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CCS/TMP103: tmp103a

NAGARAJ M
Prodigy 20 points
Part Number: TMP103

Tool/software: Code Composer Studio

LED lighting projects , read led temperature from tmp103a , 50khz i2c speed , temperature sensor reading sometimes true value (data), sometimes zero, how to solve this problem? why sometimes zero?

  • 0 in reply to NAGARAJ M
    TI__Guru* 90906 points

    Dear Nagaraj - 

    The TMP103 can be used in either one shot mode or continuous conversion mode. If you are using in one shot mode, then you will be able to retrieve new results every 26to 27mSec. If you are using the continuous conversion mode, the part is by default set for a read every 4 seconds (0.25Hz), so if you are reading out values in between conversions which are zero - the part is either in shutdown or in a conversion cycle. Please adjust your reading cycle to correspond to the conversion cycle you are using, in order to sync up your system or adjust conversion rate to match up with your reading cycle.