Dynamic high-resolution analog to digital converter and operating method thereof

A method of converting analog to digital by a dynamic high-resolution analog to digital converter (ADC), the method comprising:

• performing sampling and holding operation, in which a sample and hold circuit receiving an analog signal from a sensor samples the analog signal and holds a size of the analog signal during a sampling period;
• performing a conversion operation of obtaining a first digital signal, in which a dynamic amplifier receiving the sampled-and-held analog signal from the sample and hold circuit amplifies a size of the sampled-and-held analog signal, and the sampled-and-held analog signal with the amplified size is converted into the first digital signal by a residue signal amplifier, which is configured to amplify a difference between two signals connected respectively through both inputs of the residue signal amplifier to and inputted by both of the dynamic amplifier and a digital to analog converter (DAC), and by an ADC, which is connected to the residue signal amplifier;
• performing a conversion operation of obtaining a second digital signal, in which the ADC converts a signal not converted into the first digital signal among the sampled-and-held analog signal into a second digital signal;
• and
• performing a decoding operation, in which a decoder connected to the ADC decodes the analog signal into digital data based on the first digital signal and the second digital signal, wherein the decoder is connected to the dynamic amplifier and controls a first gain of the dynamic amplifier, and is connected to the residual signal amplifier and controls a second gain of the residue signal amplifier.