An analog-to-digital converter (ADC) device includes a delta-sigma modulator having at least one integrator and a quantizer configured to receive an output of the at least one integrator. The delta-sigma modulator also includes digital-to-analog converter (DAC) capacitor bank, a sampling capacitor bank, and a pre-charge capacitor bank, each selectively coupled to an input node of the at least one integrator. The delta-sigma modulator also includes a pre-charge signal generator coupled to the pre-charge capacitor bank. The pre-charge signal generator is configured to generate a pre-charge signal to charge the pre-charge capacitor bank based at least in part on an output code of the quantizer.