LSB split capacitor SAR ADC with 99.2% switching energy reduction

Behzad Ghanavati, Ebrahim Abiri, Mohammad Reza Salehi, Aida Keyhani, Arindam Sanyal

Research output: Contribution to journalLetterpeer-review

17 Scopus citations


A highly energy efficient capacitor switching technique in a successive approximation register (SAR) analog to digital converter (ADC) for biomedical applications is presented. The proposed scheme based on new switching method, which combine the LSB split capacitive technique and monotonic method can reduce the average switching energy by 99.2% compared to the conventional SAR architecture. Besides reducing energy in each comparison cycle, the suggested method also achieves an 8× reduction in total capacitance used in the digital to analog converter over the conventional one with the same resolution. The proposed ADC can find application in biomedical engineering systems and other fields which low power consumption is needed.

Original languageEnglish (US)
Pages (from-to)375-382
Number of pages8
JournalAnalog Integrated Circuits and Signal Processing
Issue number2
StatePublished - Nov 1 2017
Externally publishedYes


  • Analog-to-digital converter
  • Digital-to-analog converter (DAC)
  • LSB split capacitive technique
  • Successive approximation analog-to-digital converter (SAR ADC)
  • Switching energy
  • Ultra low power

ASJC Scopus subject areas

  • Signal Processing
  • Hardware and Architecture
  • Surfaces, Coatings and Films


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