Analog-to-digital conversion system and method with reduced sparkle codes

A sigma-delta converter, comprising:

• a summing node coupled to receive an analog input signal and an analog feedback signal and to output a combined analog signal;
• a loop filter coupled to receive said combined analog signal, wherein the loop filter is configured to output a filtered analog signal;
• a plurality of comparators each coupled to receive the filtered analog signal, wherein each comparator is further coupled to receive a respective reference signal for comparison with the filtered analog signal, wherein the plurality of comparators are further configured to output a thermometer code value indicative of the comparison of the filtered analog signal with the respective reference signal;
• and
• a digital-to-analog converter coupled to receive the thermometer code values indicative of the comparison of the filtered analog signal with the respective reference signals output by the plurality of comparators, wherein the digital-to-analog converter is configured to output said analog feedback signal based on the thermometer code values;
• and
• an adder decoder coupled to receive the thermometer code values, wherein the adder decoder is configured to add the digital values output by the plurality of comparators, wherein the adder decoder is further configured to output a digital signal representative of the input signal;
• wherein the adder decoder comprises programmable logic configured to add the digital values output by the plurality of comparators.