SEMICONDUCTOR INTEGRATED CIRCUITS

A 455 nW 220 fJ/conversion-step 12 bits 2 kS/s SAR ADC for portable biopotential acquisition systems

Zhang Hui, Qin Yajie, Yang Siyu and Hong Zhiliang

+ Author Affiliations

PDF

Abstract: An ultra-low power 12 bits 2 kS/s successive approximation register analog-to-digital converter (ADC) is presented. For power optimization, the voltage supply of the digital part is lowered, and the offset voltage of the latch is self-calibrated. Targeted for better linearity and lower noise, an improved digital-to-analog converter capacitor array layout strategy is presented, and a low kick-back noise latch is proposed. The chip was fabricated by using 0.18 μm 1P6M CMOS technology. The ADC achieves 61.8 dB SNDR and dissipates 455 nW only, resulting in a figure of merit of 220 fJ/conversion-step. The ADC core occupies an active area of only 674 × 639 μ m2.

Key words: ADC

  • Search

    Advanced Search >>

    GET CITATION

    shu

    Export: BibTex EndNote

    Article Metrics

    Article views: 4350 Times PDF downloads: 2692 Times Cited by: 0 Times

    History

    Received: 18 August 2015 Revised: 31 August 2010 Online: Published: 01 January 2011

    Catalog

      Email This Article

      User name:
      Email:*请输入正确邮箱
      Code:*验证码错误
      Zhang Hui, Qin Yajie, Yang Siyu, Hong Zhiliang. A 455 nW 220 fJ/conversion-step 12 bits 2 kS/s SAR ADC for portable biopotential acquisition systems[J]. Journal of Semiconductors, 2011, 32(1): 015001. doi: 10.1088/1674-4926/32/1/015001 Zhang H, Qin Y J, Yang S Y, Hong Z L. A 455 nW 220 fJ/conversion-step 12 bits 2 kS/s SAR ADC for portable biopotential acquisition systems[J]. J. Semicond., 2011, 32(1): 015001. doi: 10.1088/1674-4926/32/1/015001.Export: BibTex EndNote
      Citation:
      Zhang Hui, Qin Yajie, Yang Siyu, Hong Zhiliang. A 455 nW 220 fJ/conversion-step 12 bits 2 kS/s SAR ADC for portable biopotential acquisition systems[J]. Journal of Semiconductors, 2011, 32(1): 015001. doi: 10.1088/1674-4926/32/1/015001

      Zhang H, Qin Y J, Yang S Y, Hong Z L. A 455 nW 220 fJ/conversion-step 12 bits 2 kS/s SAR ADC for portable biopotential acquisition systems[J]. J. Semicond., 2011, 32(1): 015001. doi: 10.1088/1674-4926/32/1/015001.
      Export: BibTex EndNote

      A 455 nW 220 fJ/conversion-step 12 bits 2 kS/s SAR ADC for portable biopotential acquisition systems

      doi: 10.1088/1674-4926/32/1/015001
      • Received Date: 2015-08-18
      • Accepted Date: 2010-07-20
      • Revised Date: 2010-08-31
      • Published Date: 2010-12-19

      Catalog

        /

        DownLoad:  Full-Size Img  PowerPoint
        Return
        Return