Title :
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
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;
Conference_Titel :
ESSCIRC (ESSCIRC), 2011 Proceedings of the
Conference_Location :
Helsinki
Print_ISBN :
978-1-4577-0703-2
Electronic_ISBN :
1930-8833
DOI :
10.1109/ESSCIRC.2011.6044976
