Title :
A pseudo C-2C and CBW hybrid DAC structure used for SAR ADC
Author :
Xiaoxu Meng ; Wenliang Geng ; Yang Cao ; Guoxing Wang
Author_Institution :
Sch. of Electron. Inf. & Electr. Eng., Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
A hybrid DAC structure combined with conventional binary-weighted (CBW) capacitive array and pseudo C-2C capacitive array is proposed in the paper. Causes for nonlinearity of the structure are analyzed, including the effects of parasitics and the deviation of the capacitor adjustment parameter. Analysis of the power consumption and nonlinearity of the hybrid structure is also presented. This structure reduces power consumption by up to 99.1% compared to the conventional one. The linearity degrades with the increase of the number of pseudo C-2C units.
Keywords :
analogue-digital conversion; digital-analogue conversion; power consumption; supercapacitors; CBW hybrid DAC structure; SAR ADC; capacitor adjustment parameter; conventional binary-weighted capacitive array; parasitic effect; power consumption reduction; pseudo C-2C; successive approximation analog-to-digital converter; Approximation methods; Arrays; Capacitors; Hybrid power systems; Linearity; Power demand; Simulation;
Conference_Titel :
Semiconductor Technology International Conference (CSTIC), 2015 China
Conference_Location :
Shanghai
DOI :
10.1109/CSTIC.2015.7153487
