Simple questions about ADC input pin when doing ADC calibration

[soulshine]

Hello ST Experts,

I'm using STM32H747 and I try to run adc calibration at the start of the code, like under lines.

    HAL_ADCEx_Calibration_Start(&hadc3, ADC_CALIB_OFFSET_LINEARITY, ADC_SINGLE_ENDED);

    HAL_ADCEx_Calibration_Start(&hadc3, ADC_CALIB_OFFSET, ADC_SINGLE_ENDED);

I'm wondering if there is a need to apply a specific voltage to the ADC input lines before calling the above functions.

[TDK · Accepted solution]

No, it's all done internally. The ADC pins can be connected to whatever you need them connected to. They don't need even need to be initialized for calibration.

[soulshine]

Thank you TDK!