A 14-bit 0.17mm2 SAR ADC in 0.13μm CMOS for high precision nerve recording

Anh Tuan Nguyen, Jian Xu, Zhi Yang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations

Abstract

This paper presents a high-resolution, area- and power-efficient successive approximate register (SAR) analog-to-digital converter (ADC) for high precision nerve recording. The design features a new "half-split" feedback digital-to-analog converter (DAC) capacitor array with integrated digital calibrations, which allow automatic estimation and calibration of capacitor mismatches. As a result, the SAR ADC precision can be substantially improved given the constraints on circuits area and power consumption. The design has been fabricated in a 0.13μm CMOS process with a core area of 0.17mm2 (280μmx620μm). When measured at 40kSample/s, the ADC consumes 10μW of power and achieves a 72.7dB signal-to-noise-plus-distortion ratio (SNDR) and a 92.1dB spurious free dynamic range (SFDR) over the Nyquist bandwidth. Compared with the noncalibrated ADC, the proposed methods provide the improvements on SNDR, SFDR, and nonlinearity by 12.6dB, 22.7dB, and 4-6 times, respectively.

Original languageEnglish (US)
Title of host publication2015 IEEE Custom Integrated Circuits Conference, CICC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479986828
DOIs
StatePublished - Nov 25 2015
EventIEEE Custom Integrated Circuits Conference, CICC 2015 - San Jose, United States
Duration: Sep 28 2015Sep 30 2015

Publication series

NameProceedings of the Custom Integrated Circuits Conference
Volume2015-November
ISSN (Print)0886-5930

Other

OtherIEEE Custom Integrated Circuits Conference, CICC 2015
CountryUnited States
CitySan Jose
Period9/28/159/30/15

Keywords

  • High-resolution SAR ADC
  • capacitor mismatches estimation and calibration
  • half-split DAC array
  • high precision nerve recording

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