Provided is a semiconductor device with a novel structure in which the power consumption can be reduced. The semiconductor device includes a sensor, a sample-and-hold circuit to which a sensor signal of the sensor is input, an analog-digital converter circuit to which an output signal of the sample-and-hold circuit is input, a control circuit, a battery, and an antenna. The sample-and-hold circuit includes a first selection circuit, a plurality of signal retention circuits, and a second selection circuit, and the control circuit performs a control so that a potential corresponding to the sensor signal is retained in the plurality of signal retention circuits successively by the first selection circuit in a first period during which power is supplied from the battery, and performs a control so that the output signal based on the potential retained in the plurality of signal retention circuits is output by the second selection circuit in a second period during which power is supplied from outside through the antenna.