A technology capable of sampling sensor signals in a plurality of channels simultaneously is realized. An input unit is capable of inputting sensor signals from a plurality of sensors, and includes an analog-to-digital (AD) conversion unit which is disposed with respect to each of the plurality of sensors and acquires the sensor signal from each of the sensors and converts the sensor signal into a digital signal, and a timing control unit which controls timing at which a plurality of the AD conversion units acquire the sensor signal for each of the AD conversion units according to a sampling period of each of the plurality of sensors.