A circuit device includes a digital circuit, a digital power supply circuit that supplies a digital power supply voltage to the digital circuit, an analog circuit, and an analog power supply circuit that supplies an analog power supply voltage to the analog circuit. The analog power supply circuit has a first mode and a second mode as operation modes, the first mode is a mode in which activation of power supply is faster than that in the second mode, and the second mode is a mode in which power supply is performed with lower noise than that in the first mode.