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Thread: Read TLE5009-2010 from TLE9879-2QXA40

  1. #1
    New Member New Member APolleti is on a distinguished road
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    Read TLE5009-2010 from TLE9879-2QXA40

    Hello,
    I've connected a TLE5009-2010 on a TLE9879-2QXA40 just like in the picture that I took from the Datasheet of the tle9879-2QXA40.
    If I manually rotate the magnet and read the data from the SDADC I get massive over- and underflows (0xffff or 0) on both ADCs. I somehow doubt that can be right.
    It seems like the differential output of the TLE5009 exceeds what the SDADCs expect. It goes from approx -3 V to 3V. Is there more to the Schematic than I can see on the device sheet or do I have to configure something?

    Thanks for your replies
    Alexander Polleti
    ?????? ?????? TLE5009_on_tle98792qxa40.png‎  

  2. #2
    New Member New Member APolleti is on a distinguished road
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    I found the bug:
    The functions SDADC_Ch0_Result_Get and SDADC_Ch1_Result_Get return unsigned values while the interpreted reigster content is signed
    Code:
    uint16_t res = SDADC_Ch0_Result_Get();
    int16_t adc0_raw = *((int16_t*)&res);
    solved the mystery

  3. #3
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    Infineon Employee
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    Fiz is on a distinguished road
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    Hello Alexander,

    good to see you were able to solve the problem on your own!

    Best,
    Fiz
    The views expressed here are my personal opinions, have not been reviewed or authorized by Infineon and do not necessarily represent the views of Infineon.

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