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CCS/TMS320F28377S: Noise in ADCIN14 and ADCIN15

Deepak Arumugam
Intellectual 430 points

Part Number: TMS320F28377S

Tool/software: Code Composer Studio

Even when i don't give any input to in14 in15 a small value is generated in the result registers.When i give some input i am getting appropriate answers.(i used the same code for Adcina0 and 0 was generated in the result registers when no input was given)

  • 0
    TI__Guru 60865 points
    Hi Deepak,

    In general you should not be concerned with the ADC output when the input is floating; this generally does not have any meaning.

    ADC input A0 is likely 0 because there is parasitic a pull-down due to a DAC output that is muxed with this pin.