High Resolution and Linearity Enhanced SAR ADC for Wearable Sensing Systems

Fan, H., Heidari, H. and Maloberti, F. (2017) High Resolution and Linearity Enhanced SAR ADC for Wearable Sensing Systems. In: IEEE International Symposium on Circuits and Systems (ISCAS), Baltimore, MD, USA, 28-31 May 2017, (Accepted for Publication)

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Abstract

This paper presents linearity enhancement capacitor re-configuring technique to improve the Spurious Free Dynamic Range (SFDR) and Signal-to-Noise-and-Distortion Ratio (SNDR) of ADC simultaneously without sacrificing the sampling rate in a 14-bit successive approximation register (SAR) analog-to-digital converter (ADC) for wearable electronics application. Behavioural Monte-Carlo simulations are presented to demonstrate the effect of the proposed method where no complex least-mean-square (LMS) algorithm or auxiliary calibration DAC needed. Simulation results show that with a mismatch error typical of modern technology, the SFDR is enhanced by about 18 dB and the SNDR is 15 dB better with the proposed technique for a 14-bit SAR ADC, which makes it suitable for accurate and linear smart sensor nodes in wearable sensing systems.

Item Type:Conference Proceedings
Status:Accepted for Publication
Refereed:Yes
Glasgow Author(s) Enlighten ID:Heidari, Dr Hadi
Authors: Fan, H., Heidari, H., and Maloberti, F.
Subjects:T Technology > T Technology (General)
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
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