Energy efficient asymmetric binary search switching technique for SAR ADC

An asymmetric binary search switching technique for a successive approximation register (SAR) ADC is presented, and trade-off between switching energy and conversion cycles is discussed. Without using any additional switches, the proposed technique consumes 46% less switching energy, for a small input swing (0.5 V_{ref P-P}), as compared to the last reported efficient switching technique in literature for an 8-bit SAR ADC. For a full input swing (2 V_{ref P-P}), the proposed technique consumes 16.5% less switching energy.