A semiconductor device includes an analog-digital converter circuit. The analog-digital converter circuit includes a delay cell array and an encoder. The delay cell array contains n number of serially-coupled delay cells, receives a reference clock signal, and utilizes an analog input signal as the power supply voltage for the delay cells in each stage. The encoder encodes an output signal from the delay cell in each stage for the delay cell array and outputs the encoded output signal as a digital output signal. The n number of delay cells includes delay quantities weighted for each delay cell. The encoder encodes the output signal of the delay cells in each stage for the delay cell array by weighting corresponding to the number of delay cell stage.