An integrated circuit device includes a terminal region in which a second signal terminal to which a second signal is input is disposed, an AFE circuit (analog front-end circuit) that performs waveform shaping of the second signal, and a time-to-digital converter that converts a time difference between a transition timing of a first signal and a transition timing of the second signal subjected to waveform shaping, to a digital value. When a direction from a first side of the integrated circuit device toward a second side facing the first side is set as a first direction, the AFE circuit is disposed on the first direction side of the terminal region, and the time-to-digital converter is disposed on at least one side of the first direction side of the AFE circuit and a side of a direction intersecting the first direction.