10-bit 30-MS/s SAR ADC using a switchback switching method

Guan Ying Huang, Soon Jyh Chang, Chun Cheng Liu, Ying Zu Lin

Research output: Contribution to journalArticlepeer-review

77 Citations (Scopus)


This brief presents a 10-bit 30-MS/s successive-approximation-register analog-to-digital converter (ADC) that uses a power efficient switchback switching method. With respect to the monotonic switching method, the input common-mode voltage variation reduces which improves the dynamic offset and the parasitic capacitance variation of the comparator. The proposed switchback switching method does not consume any power at the first digital-to-analog converter switching, which can reduce the power consumption and design effort of the reference buffer. The prototype was fabricated in a 90-nm 1P9M CMOS technology. At 1-V supply and 30 MS/s, the ADC achieves an sequenced neighbor double reservation of 56.89 dB and consumes 0.98 mW, resulting in a figure-of-merit (FOM) of 57 fJ/conversion-step. The ADC core occupies an active area of only 190×,525 μm2.

Original languageEnglish
Article number6172687
Pages (from-to)584-588
Number of pages5
JournalIEEE Transactions on Very Large Scale Integration (VLSI) Systems
Issue number3
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

  • Software
  • Hardware and Architecture
  • Electrical and Electronic Engineering


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