a loop filter comprising a first integrator having a first loop filter coefficient and a second integrator operatively coupled to said first integrator, said second integrator having a second loop filter coefficient;

a modulator coupled to said loop filter;

a reset switch coupled to said second integrator;

a first peak detector operatively coupled in series with said second integrator to indicate an instability condition of a signal level exceeding a first threshold at an output of said second integrator;

a second peak detector adapted to detect an input signal level to said CT-SD data converter; and

a digital engine coupled to said first peak detector, said digital engine configured to execute an optimal processing sequence based on at least one of:

a pattern of differences between said signal level indicated by said first peak detector and said first threshold; and

said input signal level detected by said second peak detector.