|The Macro Cell SCDAC12F.C35 is a 12-Bit SAR analog to digital converter. The architecture is based on a charge redistribution switched capacitor main-DAC for the MSBs and a resistor string sub-DAC for the LSBs.
The inherent track-and-hold operation of the input stage avoids the need for additional sample-and-hold stages. At the beginning of the tracking phase the whole main-DAC is recharged. This causes high input current peaks.