A time-interleaved analog to digital converter includes capacitor array circuits, at least one successive approximation register circuitry, and at least one noise shaping circuitry. The capacitor array circuits are configured to alternately sample an input signal, in order to generate a sampled input signal. The at least one successive approximation register circuitry is configured to perform an analog to digital conversion according to the sampled input signal and a residue signal, in order to generate at least one digital output. The at least one noise shaping circuitry is configured to utilize at least one first circuit in switched-capacitor circuits to transfer the residue signal from a first capacitor array circuit in the capacitor array circuits, and randomly select at least one second circuit from the switched-capacitor circuits to cooperate with a second capacitor array circuit in the capacitor array circuits to sample the input signal.