Adaptive matching of similar data in a data repository to determine if two or more data items are related in accordance with configurable criteria. The pre-pits have a shortest pit length in a range from 0. The total capacitance of the uncalibrated capacitor may be apportioned between the smaller capacitors so that the individual maximum charge contribution of each smaller capacitor to the converter output together with any expected manufacturing variance does not exceed the aggregated contribution of the previously calibrated capacitors.