An analog front-end circuit includes an analog processing circuit, an A/D converter, a calculation circuit, and a correction amount register in which a correction amount is set. The analog processing circuit includes an offset adjustment circuit that includes an offset adjustment register. The calculation circuit monitors an A/D-converted value output from the A/D converter, detects the change amount of the A/D-converted value when changing an offset adjustment value set in the offset adjustment register by 1 LSB as the correction amount, and sets the detected correction amount in the correction amount register.