ANALOG-TO-DIGITAL CONVERTER, ELECTRONIC DEVICE INCLUDING THE SAME, AND OPERATING METHOD OF ANALOG-TO-DIGITAL CONVERTER

Disclosed are an analog-to-digital converter (ADC), an electronic device including the ADC, and an operating method of the ADC. The ADC includes a first stage that includes a plurality of channels, generates a first sampling signal by sequentially sampling a first analog signal based on time interleaving, and generates a first digital signal and a first residual signal corresponding to the first analog signal by performing analog-to-digital conversion based on the first sampling signal, an amplifier that amplifies the first residual signal, and a second stage that includes a plurality of channels, generates a second sampling signal by sequentially sampling the amplified first residual signal based on time interleaving, and generates a second digital signal and a second residual signal corresponding to the first analog signal by performing analog-to-digital conversion based on the second sampling signal. The number of the plurality of channels included in the first stage is odd-numbered.