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ADC124S021 Strange Behavior Dout value doubles

Steve Clark97
Prodigy 10 points

I'm using the ADC124S021CIMM/NOPB and I am experiencing a strange issue when debugging. It seems that every time I reprogram my uC and request data from IN1, the output from the ADC doubles. This behavior is consistent. Is there something that occurs when the device is in its tracking mode?

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    TI__Genius 16890 points
    Hello,

    By this do you mean, for example, if you read 512 the first time the next time you would read 1024?

    Some things to check:

    What is happening to the input during this time?
    This is a 4 channel device, is it reading the same channel each time or is the code reading another channel?
    Any changes in supply voltage?
    What are the actual codes that are coming from the ADC? Have you been able to look at the SPI signal with a scope to verify that the micro is reading them correctly?

    Mike