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《Microelectronics》 2016-01
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Design of a Novel Two-Split Capacitor DAC

ZHENG Yingxin;WANG Zongmin;ZHAO Yuanfu;Beijing Microelectronics Tech.Institute;  
To reduce furtherly the area of capacitor array,a novel two-split capacitor(T-SC)array was proposed,which could be used for SAR ADCs.Compared with the conventional split capacitor arrays,this new architecture could reduce the chips area without more matching requirements.A theoretical analysis was made on the mismatch and parasitic effects of capacitors,and a simple formula for calculating the DNL of DAC was concluded.Matlab results were in good agreement with that of the theoretical analysis.T-SC architecture could achieve good characteristics of binary-weight.Based on the parameters using the concluded simple formula,the standard deviation of DNL was 0.51 LSB,which was 0.01 LSB larger than the theoretical value.
【CateGory Index】: TN792
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