A/D converter, digital-output temperature sensor, circuit device, and oscillator

An A/D converter configured to perform an A/D conversion on an input signal to output ADC result data, the A/D converter comprising:

• a D/A conversion circuit configured to perform a D/A conversion on a DAC input digital value to output a DAC output signal;
• a difference output circuit configured to output difference signals based on a difference between the input signal and the DAC output signal;
• an A/D conversion circuit configured to perform an A/D conversion on the difference signals to output an ADC output digital value;
• and
• a control circuit configured to output the DAC input digital value based on the ADC output digital value, wherein
• the control circuit is configured to
• output a first DAC input digital value and a second DAC input digital value different from the first DAC input digital value as the DAC input digital value, and
• obtain the ADC result data based on a first ADC output digital value as the ADC output digital value obtained in accordance with the first DAC input digital value, a second ADC output digital value as the ADC output digital value obtained in accordance with the second DAC input digital value, and the DAC input digital value.