A 4-10 bit, 0.4-1V Power Supply, Power Scalable Asynchronous SAR-ADC in 40nm-CMOS withWide Supply Voltage Range SAR Controller

Akira Shikata, Ryota Sekimoto, Kentaro Yoshioka, Tadahiro Kuroda, Hiroki Ishikuro

    Research output: Contribution to journalArticle

    2 Citations (Scopus)


    This paper presents a wide range in supply voltage, resolution, and sampling rate asynchronous successive approximation register (SAR) analog-to-digital converter (ADC). The proposed differential flipflop in SAR logic and high efficiency wide range delay element extend the flexibility of speed and resolution tradeoff. The ADC fabricated in 40 nm CMOS process covers 4-10 bit resolution and 0.4-1V power supply range. The ADC achieved 49.8 dB SNDR and the peak FoM of 3.4 fJ/conv. with 160 kS/sec at 0.4V single power supply voltage. At 10 bit mode and 1V operation, up to 10MS/s, the FoM is below 10 fJ/conv. while keeping ENOB of 8.7 bit.

    Original languageEnglish
    Pages (from-to)443-452
    Number of pages10
    JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
    Issue number2
    Publication statusPublished - 2013 Feb



    • Analog-to-digital converter
    • Asynchronous
    • Differential flip-flop
    • Successive approximation

    ASJC Scopus subject areas

    • Signal Processing
    • Computer Graphics and Computer-Aided Design
    • Electrical and Electronic Engineering
    • Applied Mathematics

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