An analog-to-digital conversion apparatus includes: a second or higher order ΔΣ analog-to-digital converter which receives input of analog data and generates a digital modulated signal including more significant bits; a cyclic analog-to-digital convertor which receives input of an analog signal and generates a multi-bit digital value of less significant bits, the analog signal being included in the analog data and having not been subjected to ΔΣ processing by the ΔΣ analog-to-digital converter.