Analog-to-digital conversion circuit and method

An analog-to-digital conversion circuit, comprising:

• an analog-to-digital converter (ADC) configured to sequentially convert an analog input signal into a plurality of conversion bits in response to a plurality of cycles of a clock signal;
• and
• a debounce controller configured to sequentially receive the conversion bits in response to each of the cycles of the clock signal,
• wherein in each of the cycles, the debounce controller is configured to integrate the received conversion bits into conversion data and to determine whether the conversion data exceeds a normal range,
• wherein when the conversion data exceeds the normal range, the debounce controller is configured to provide an abort signal to the analog-to-digital converter, so that the analog-to-digital converter stops converting the analog input signal,
• wherein a high threshold value of the normal range is obtained by adding a previous digital output signal and a threshold setting value, and
• wherein a lower threshold value of the normal range is obtained by subtracting the threshold setting value from the previous digital output signal.