Impact of parasitic capacitances on the performance of SAR ADCs based on capacitive arrays

Abstract

This paper analyzes the effect of parasitic capacitances on the performance of SAR ADCs based on capacitive arrays, usually employed in biomedical sensors due to their low-power consumption. The paper compares the most common architectures employed for capacitive DACs, analyzing the different effects that parasitic capacitances have on their linearity and the effect that they have in the performance of the ADCs embedding these DACs.

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