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ADC12DJ5200RF: How do I switch input channels?

user5788058
Intellectual 410 points

Part Number: ADC12DJ5200RF

Hi,

I use an ADC12DJ5200RF mounted on a board I designed.

What should I do if I want to change the input channel from channel A to channel B after ADCIC starts up?
Even if it was set to channel A in the initial setting and only the value of INPUT_MUX was changed to 0x2, only the signal of channel A was accepted.
Similarly, when it was set to the B channel input in the initial setting and the value of INPUT_MUX was changed to 0x1, only the B channel was accepted.

  • 0
    TI__Mastermind 45670 points

    Hi,

    There are two things that need to be applied in order to get the input_mux option to work for either INA or INB selection.

    1) refer to page 62 on the datasheet, make sure the correct JMODE is selected, any JMODE with a single-channel option.

    2) refer to page 89 on the datasheet, in table 74, once the INA or INB is selected, the CAL_EN also needs to be initialized in order for the channel to change.

    Please write 0x0, then 0x1 to register 0x6C.

    Regards,

    Rob