An analog-to-digital converter (ADC) system that converts an analog input signal into a digital output circuit includes a first stage analog-to-digital converter circuit coupled with a second stage analog-to-digital converter circuit. The first stage analog-to-digital converter circuit includes a quantizer, comparator, integrator, and a feedback digital-to-analog converter (DAC). The second stage analog-to-digital converter circuit includes a backend ADC that further quantizes the integrator output. Furthermore, the first stage analog-to-digital converter circuit also includes redundancy that corrects comparator offsets and prevents nonlinearities and harmonic distortion in the second stage analog-to-digital converter circuit caused by uncorrected comparator offsets.