DocumentCode :
1478041
Title :
A 10-bit Charge-Redistribution ADC Consuming 1.9 
W at 1 MS/s
Author :
Van Elzakker, Michiel ; Van Tuijl, Ed ; Geraedts, Paul ; Schinkel, Daniël ; Klumperink, Eric A M ; Nauta, Bram
Author_Institution :
IC Design group, Univ. of Twente, Enschede, Netherlands
Volume :
45
Issue :
5
fYear :
2010
fDate :
5/1/2010 12:00:00 AM
Firstpage :
1007
Lastpage :
1015
Abstract :
This paper presents a 10 bit successive approximation ADC in 65 nm CMOS that benefits from technology scaling. It meets extremely low power requirements by using a charge-redistribution DAC that uses step-wise charging, a dynamic two-stage comparator and a delay-line-based controller. The ADC requires no external reference current and uses only one external supply voltage of 1.0 V to 1.3 V. Its supply current is proportional to the sample rate (only dynamic power consumption). The ADC uses a chip area of approximately 115×225 μm2. At a sample rate of 1 MS/s and a supply voltage of 1.0 V, the 10 bit ADC consumes 1.9 μW and achieves an energy efficiency of 4.4 fJ/conversion-step.
Keywords :
CMOS integrated circuits; analogue-digital conversion; comparators (circuits); digital-analogue conversion; 10 bit successive approximation ADC; 10-bit charge-redistribution ADC; CMOS technology; charge-redistribution DAC; chip area; delay-line-based controller; dynamic two-stage comparator; power 1.9 μW; reference current; size 65 nm; step-wise charging; supply current; voltage 1.0 V to 1.3 V; Analog circuits; Analog-digital conversion; CMOS technology; Clocks; Delay; Energy consumption; Energy efficiency; Intelligent sensors; Voltage; Wireless sensor networks; ADC; CMOS; DAC; analog-to-digital converter; asynchronous; charge-redistribution; comparators; digital-to- analog converter; dynamic power dissipation; figure of merit; low noise; low power; low static current; sense amplifiers; sensors; smart dust; step-wise charging; successive approximation; wireless sensor networks; wireless sensors;
fLanguage :
English
Journal_Title :
Solid-State Circuits, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9200
Type :
jour
DOI :
10.1109/JSSC.2010.2043893
Filename :
5453302
Link To Document :
