Digital-domain calibration of split-capacitor DAC with no extra calibration DAC for a differential-type SAR ADC

2011 ◽  
Author(s):  
Ji-Yong Um ◽  
Jae-Hwan Kim ◽  
Jae-Yoon Sim ◽  
Hong-June Park
Keyword(s):  
Sar Adc ◽  
Differential Type ◽  
Split Capacitor

Study of Split Capacitor DAC Mismatch and Calibration in SAR-ADC

2016 ◽  
Vol 26 (01) ◽  
pp. 1750003
Author(s):  
Yun Zhang ◽  
Yiqiang Zhao ◽  
Peng Dai
Keyword(s):  
Calibration Method ◽  
Sar Adc ◽  
Calibration Error ◽  
Cmos Process ◽  
Analog To Digital ◽  
Significant Performance ◽  
Performance Deterioration ◽  
Conventional Structure ◽  
Split Capacitor ◽  
Simulation Results

Mismatch and parasitic effects of bridge capacitors in successive-approximation-register analog-to-digital converter’s (SAR-ADC) split capacitor digital-to-analog conversion (DAC) cause a significant performance deterioration. This paper presents a nonlinearity analysis based on an analytical model, and a modified calibration method utilizing a pre-bias bridge capacitor is accordingly proposed. The proposed method, which uses three-segment split capacitor DAC structure, can effectively eliminate over-calibration error caused by conventional structure. To verify the technique, a 14-bit SAR-ADC has been designed in 0.35-[Formula: see text]m 2P4M CMOS process with the PIP capacitor, and the simulation results show the method can further improve ADC performance.

A self-calibration method for capacitance mismatch in SAR ADC with split-capacitor DAC

2015 ◽  
Vol 46 (6) ◽  
pp. 431-438 ◽  
Author(s):  
Peng Dai ◽  
Yiqiang Zhao ◽  
Yun Sheng ◽  
Yun Zhang
Keyword(s):  
Calibration Method ◽  
Sar Adc ◽  
Self Calibration ◽  
Split Capacitor

High-resolution 1 MS/s sub-2 radix split-capacitor SAR ADC

2017 ◽  
Vol 38 (10) ◽  
pp. 105008 ◽  
Author(s):  
Chao Cao ◽  
Zhangming Zhu
Keyword(s):  
High Resolution ◽  
Sar Adc ◽  
Split Capacitor
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