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TMS320F28388D: ADC architecture

vesgine
Expert 1315 points
Part Number: TMS320F28388D

The application report spracw9 mentioned that the C2000 ADC architecture as shown below:

For 28388D's ADC, if it is operating in differential mode, the S+H capacitor will start discharged or pre-charged to a voltage close to the previous channel?

  • 0
    TI__Guru 60865 points

    Hi Vesgine,

    If the ADC is operating in differential mode, the S+H capacitor voltage will start close to the previously sampled (differential) voltage.

    The only special case is for ADCs that support differential mode, but are operating in single-ended mode, then the S+H capacitor can sometimes start discharged (the specific circumstances are described in the text snippet you posted).