A/D CONVERTER AND SENSOR SYSTEM INCLUDING THE SAME

The problem to be solved by the present disclosure is to provide an A/D converter and a sensor system designed to contribute to miniaturization. A D/A conversion unit (5) generates a comparison voltage corresponding to a target bit falling within a range from the most significant bit to the least significant bit. A comparator (7) determines the value of the target bit by comparing a differential voltage (V4) between the output signal (V3) input to the switching unit (2) and the comparison voltage generated by the D/A conversion unit (5) with a reference voltage. The integrator (61) integrates the conversion error after the comparator (7) has performed the successive approximation operation up to the least significant bit. In a first conversion operation for A/D conversion of a first signal (VA), a control unit (4) sets a reference voltage on the basis of an integration result obtained by an integrator (61) after A/D conversion of the first signal (VA) as an output signal (V3) last supplied by an input switchi