A 2MS/s, 11.22 ENOB, 3.2 Vpp-d SAR ADC with improved DNL and offset calculation

  • Sohail Asghar
  • , Sohaib Afridi
  • , Anu Pillai
  • , Anita Schuler
  • , Jose M. De La Rosa
  • , Ivan O'Connell

Research output: Chapter in Book/Report/Conference proceedingsChapterpeer-review

Abstract

A 12-bit SAR ADC with an extended input range of 3.2 Vpp-d (±1.33 VREF) achieved through the use of an input sampling scaling technique, is presented. The circuit also includes a comparator offset compensation technique that results in a residual offset of less than 0.5 LSB. The ADC is implemented in a 0.13 μm CMOS process and achieves an SNDR of 69.3 dB and an SFDR of 79 dB without calibration, while consuming 0.9 mW, with a measured DNL of 1.2/-1.0 LSB and INL of 2.3/-2.2 LSB.

Original languageEnglish
Title of host publication2018 IEEE International Symposium on Circuits and Systems, ISCAS 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538648810
DOIs
Publication statusPublished - 26 Apr 2018
Event2018 IEEE International Symposium on Circuits and Systems, ISCAS 2018 - Florence, Italy
Duration: 27 May 201830 May 2018

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
Volume2018-May
ISSN (Print)0271-4310

Conference

Conference2018 IEEE International Symposium on Circuits and Systems, ISCAS 2018
Country/TerritoryItaly
CityFlorence
Period27/05/1830/05/18

Keywords

  • Analog-to-Digital Converters
  • capacitor segmentation
  • comparator offset
  • feedback control system
  • SAR

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