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14b SAR ADC with ODC Background Calibration
Authors
	Rybakov A.A.
	Sergeychuk D.
Date of publication
	2018
DOI
	10.31114/2078-7707-2018-4-30-35
Abstract
	The capacitor matrix makes a significant contribution to the SAR ADC conversion error realized by capacitor based DAC. The architecture of a fully differential CMOS SAR ADC with a digital pseudo-background calibration based on the ODC (Offset Double Conversation) method is proposed. After calibration, SNDR and THD were improved from 60.8, 65.0 dB to 70.7, 83.8, 96.7 dB, respectively. The convergence time is about 16,000 samples, with offset ±20 LSB. In this architecture, the offset adjustment is provided. The proposed architecture is easy to implement and provides high accuracy of conversion.
Keywords
	SAR ADC, capacitor based DAC, oxide-gradient-induced mismatch, overall correlation coefficient
Library reference
	Rybakov A.A., Sergeychuk D. 14b SAR ADC with ODC Background Calibration // Problems of Perspective Micro- and Nanoelectronic Systems Development - 2018. Issue 4. P. 30-35. doi:10.31114/2078-7707-2018-4-30-35
URL of paper
	http://www.mes-conference.ru/data/year2018/pdf/D067.pdf