DocumentCode
109549
Title
1.2 V–0.18- 
CMOS Temperature Sensors With Quasi-Digital Output for Portable Systems
Author
Azcona, Cristina ; Calvo, Belen ; Medrano, Nicolas ; Celma, Santiago
Author_Institution
Aragon Inst. for Eng. Res. (I3A), Univ. of Zaragoza, Zaragoza, Spain
Volume
64
Issue
9
fYear
2015
fDate
Sept. 2015
Firstpage
2565
Lastpage
2573
Abstract
This paper presents two compact frequency-output temperature sensors based on a multivibrator current-to-frequency converter to improve sensor linearity over a wide temperature range featuring low-voltage low-power operation. Both sensors have been fabricated in a low-cost 0.18-μm CMOS technology with a single 1.2 V supply voltage. They show high linearity over a temperature range of -40°C to +120°C, achieving an inaccuracy of ±1°C, with sensitivities of 335 Hz/°C and 460 Hz/°C, a power consumption below 3 μW, and an area below 0.025 mm2. These features make them a highly suitable solution in the case of portable applications.
Keywords
CMOS digital integrated circuits; frequency convertors; low-power electronics; multivibrators; portable instruments; temperature measurement; temperature sensors; CMOS temperature sensor; compact frequency-output temperature sensor; low-voltage low-power operation; multivibrator current-tofrequency converter; portable system; quasidigital output; size 0.18 mum; temperature -40 degC to 120 degC; voltage 1.2 V; CMOS integrated circuits; Frequency conversion; Frequency measurement; Temperature measurement; Temperature sensors; Transistors; Wireless sensor networks; CMOS integrated circuits; low-voltage low-power; quasi-digital output; smart sensors; temperature to frequency; wireless sensor network (WSN); wireless sensor network (WSN).;
fLanguage
English
Journal_Title
Instrumentation and Measurement, IEEE Transactions on
Publisher
ieee
ISSN
0018-9456
Type
jour
DOI
10.1109/TIM.2015.2408804
Filename
7063954
Link To Document