A 0.5V 20fJ/conversion-step rail-to-rail SAR ADC with programmable time-delayed control units for low-power biomedical application

Author

Chang, Sun-Il ; Al-Ashmouny, Khaled ; Yoon, Euisik

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Univ. of Michigan, Ann Arbor, MI, USA

fYear

2011

fDate

12-16 Sept. 2011

Firstpage

339

Lastpage

342

Abstract

We report a 0.5V 20fJ/c-s 8bit rail-to-rail SAR ADC realized in 0.25μm technology in a small area of 0.041mm². For the low-power operation, voltage-scalable single-clock (LVS) bootstrap circuitry and a programmable time-delayed control unit have been proposed and implemented. The measured FOM is 20fJ/c-s at 31.25 kS/s with SNDR of 45.14 dB. The proposed ADC can boost the input range to extend its full-scale range above the rail by one bit without any additional hardware.

Keywords

analogue-digital conversion; biomedical electronics; bootstrap circuits; comparators (circuits); digital control; low-power electronics; programmable circuits; conversion-step rail-to-rail SAR ADC; low-power biomedical application; noise figure 45.14 dB; programmable time-delayed control units; size 0.25 mum; voltage 0.5 V; voltage-scalable single-clock bootstrap circuitry; CMOS integrated circuits; CMOS technology; Clocks; Frequency measurement; Generators; Rails; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

ESSCIRC (ESSCIRC), 2011 Proceedings of the

Conference_Location

Helsinki

ISSN

1930-8833

Print_ISBN

978-1-4577-0703-2

Electronic_ISBN

1930-8833

Type

conf

DOI

10.1109/ESSCIRC.2011.6044976

Filename

6044976