A 95-MS/s 11-bit 1.36-mW asynchronous SAR ADC with embedded passive gain in 65nm CMOS

Jae Won Nam, David Chiong, Mike Shuo Wei Chen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

8 Scopus citations

Abstract

An 11b asynchronous successive approximation register analog to digital converter with embedded passive gain architecture is proposed and prototyped in 65nm CMOS. The proposed passive gain technique is integrated in the sampling capacitor network as part of the SAR conversion, and provides a signal gain of 2x prior to the comparator without consuming static current. It thus reduces the comparator noise impact as well as enhancing the overall ADC conversion speed and power efficiency. The ADC prototype demonstrates a peak SNDR of 63.1dB and SFDR of 75.2dB when sampling at 95MS/s. Both measured differential and integral nonlinearities of the prototype are less than 0.84 LSB. It occupies an active area of 0.073mm2 and dissipates 1.36mW from 1.1V supply.

Original languageEnglish
Title of host publicationProceedings of the IEEE 2013 Custom Integrated Circuits Conference, CICC 2013
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781467361460
DOIs
StatePublished - 7 Nov 2013
Event35th Annual Custom Integrated Circuits Conference - The Showcase for Circuit Design in the Heart of Silicon Valley, CICC 2013 - San Jose, CA, United States
Duration: 22 Sep 201325 Sep 2013

Publication series

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

Conference

Conference35th Annual Custom Integrated Circuits Conference - The Showcase for Circuit Design in the Heart of Silicon Valley, CICC 2013
Country/TerritoryUnited States
CitySan Jose, CA
Period22/09/1325/09/13

Keywords

  • analog-to-digital
  • SAR
  • sub-radix

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