摘要
Internet-of-things applications require high energy-efficient ADC. Several SAR ADCs have been reported [1-2] with comparatively low FoMs by reducing the switching energy of the power hungry capacitor array. This paper proposes a shifted monotonic switching (SMS) scheme to achieve an average switching energy of 63.75CV2 with a reduction of 75%, 72%, and 73% compared to monotonic switching (MS), sub-ranging (SR) procedure [1], and merge and split (MAS) switching [2] procedure, respectively. Proper redundancy design is also employed to tolerate the non-ideal effects including dynamic comparator offset, Vcm variation, and settling error.