Novel hybrid D/A structures for high-resolution SAR ADCs-analysis, modeling and realization

Authors:
Tong Xingyuan;Yang Yintang;Zhu Zhangming;Liu Lianxi
Affiliations:
School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an, China;Institute of Microelectronics, Xidian University, Xi'an, China;Institute of Microelectronics, Xidian University, Xi'an, China;Institute of Microelectronics, Xidian University, Xi'an, China
Venue:
Microelectronics Journal
Year:
2011

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Abstract

An intermittent-sleeping C-R hybrid D/A structure, a resistor-reusing R-C hybrid D/A structure and an R-C-R combined D/A structure are researched with theoretical analysis and Matlab modeling in this paper. The switching power and passive components' matching requirement of these D/A structures are discussed in detail. Three SAR ADCs with these three novel structures are realized based on SMIC 0.18@mm CMOS, SMIC 90nm CMOS and UMC 90nm CMOS, respectively. The theoretical analysis, modeling verification and circuit realization proves the applicability of these three D/A conversion networks to high-resolution SAR ADCs.