• DocumentCode
    183208
  • Title

    15.4b incremental sigma-delta capacitance-to-digital converter with zoom-in 9b asynchronous SAR

  • Author

    Sechang Oh ; Wanyeong Jung ; Kaiyuan Yang ; Blaauw, D. ; Sylvester, Dennis

  • Author_Institution
    Univ. of Michigan, Ann Arbor, MI, USA
  • fYear
    2014
  • fDate
    10-13 June 2014
  • Firstpage
    1
  • Lastpage
    2
  • Abstract
    An incremental zoom-in capacitance-to-digital converter (CDC) is proposed. By using a 9b SAR, the OSR can be reduced to only 32, significantly improving conversion energy. We show how the OTA in the SAR is bypassed for the CDC further reducing energy and propose a novel matrix based 512-element unit-cap structure for dynamic element matching. The CDC achieves 94.7dB SNR and 33.7μW power consumption with 175fJ/conv-step at 1.4V supply.
  • Keywords
    sigma-delta modulation; CDC; OSR; SNR; dynamic element matching; energy conversion; incremental sigma-delta capacitance-to-digital converter; matrix based 512-element unit-cap structure; over-sampling ratio; power 33.7 muW; voltage 1.4 V; word length 15.4 bit; word length 9 bit; zoom-in asynchronous SAR; Abstracts; Accuracy; Capacitance; Clocks; Indexes; Periodic structures; Power measurement;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    VLSI Circuits Digest of Technical Papers, 2014 Symposium on
  • Conference_Location
    Honolulu, HI
  • Print_ISBN
    978-1-4799-3327-3
  • Type

    conf

  • DOI
    10.1109/VLSIC.2014.6858443
  • Filename
    6858443
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=183208