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

fYear

2015

fDate

15-16 March 2015

Firstpage

1

Lastpage

3

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Semiconductor Technology International Conference (CSTIC), 2015 China

Conference_Location

Shanghai

ISSN

2158-2297

Type

conf

DOI

10.1109/CSTIC.2015.7153487

Filename

7153487