Abstract
An energy-efficient D/A conversion structure combined with a splited unit-capacitor array and an intermittent-sleeping resistor string is presented for low power SAR A/D converter. The energy dissipation and the matching requirement of the D/A conversion network are researched based on Matlab modeling. And its superiority and applicability are proven by the realization of an 8-bit 200kS/s 25.6 μW 65 nm CMOS SAR A/D converter with this proposed D/A structure.
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