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Thread: DPS422 Temperature

  1. #1
    New Member New Member GDM is on a distinguished road
    Join Date
    Jun 2020

    DPS422 Temperature

    I am using a DPS422 over I2C and am having issues getting a valid temperature

    I have read out the coeff block and get a TGain of 16, a dVbe of 5 and a Vbe of -2
    I calculate this out (in code and excel) as

    Aadc 0.67635
    dVbe 0.040339153
    Vbe 0.46302236

    VBE_CAL 0.684589872
    dVBE_CAL 0.059642423
    TCalib 26.85138549
    Vbe_CalTRef 0.684332026
    Kptat 0.036844021
    Aprime 6509.825339
    Bprime -284.2032573

    I make a temp reading and get 0x03A263 but this calculates out to 185.7

    Can anyone point out where I have gone wrong in the maths or which value from the IC is not as expected?

    Thanks, Steve.

  2. #2
    Beginner Beginner forix is on a distinguished road
    Join Date
    Feb 2012
    Maybe the arduino source code will help.

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