A 12-b Asynchronous SAR Type ADC for Bio Signal Detection

Title
A 12-b Asynchronous SAR Type ADC for Bio Signal Detection
Authors
윤광섭; 이상민
Keywords
SAR type ADC, biomedical, split capacitor array, asynchronous control
Issue Date
2013
Publisher
JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE
Series/Report no.
JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE ; Vol13 no.2 Startpage 108 Endpage 113
Abstract
This paper describes a low power asynchronous successive approximation register (SAR) type 12b analog-to-digital converter (ADC) for biomedical applications in a 0.35 μm CMOS technology. The digital-to-analog converter (DAC) uses a capacitive split-arrays consisting of 6-b main array, an attenuation capacitor C and a 5-b sub array for low power consumption and small die area. Moreover, splitting the MSB capacitor into subcapacitors and an asynchronous SAR reduce power consumption. The measurement results show that the proposed ADC achieved the SNDR of 68.32 dB, the SFDR of 79 dB, and the ENOB (effective number of bits) of 11.05 bits. The measured INL and DNL were 1.9LSB and 1.5LSB, respectively. The power consumption including all the digital circuits is 6.7 μW at the sampling frequency of 100 KHz under 3.3 V supply voltage and the FoM (figure of merit) is 49 fJ/conversion-step.
URI
http://dx.doi.org/10.5573/JSTS.2013.13.2.108
http://dspace.inha.ac.kr/handle/10505/34299
ISSN
1598-1657
Appears in Collections:
College of Engineering(공과대학) > Electronic Engineering (전자공학) > Local Access Journals, Paper, Reports (전자공학 논문, 보고서)

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