Title :
A frequency-output temperature sensor with supply voltage insensitivity for battery operated systems
Author :
Azcona, C. ; Calvo, B. ; Medrano, N. ; Celma, S. ; Garcia-Romeo, D.
Author_Institution :
Group of Electron. Design - I3A, Univ. of Zaragoza, Zaragoza, Spain
Abstract :
This paper presents a new low-voltage low-power CMOS temperature sensor, targeting long-life autonomous portable applications. The frequency-output sensor includes a novel VDD-compensation strategy, achieving supply voltage independence. Results for a 0.18 μm CMOS implementation show a linear response over a wide range of (-40, +120 oC), with a sensitivity of 546 Hz/oC and a power consumption of 2 μW at 1 V single supply.
Keywords :
CMOS integrated circuits; frequency synthesizers; low-power electronics; temperature sensors; CMOS implementation; VDD-compensation strategy; battery operated systems; frequency-output sensor; long-life autonomous portable applications; low-voltage low-power CMOS temperature sensor; power 2 muW; size 0.18 mum; supply voltage independence; voltage 1 V; Accuracy; Frequency conversion; Resistors; Temperature dependence; Temperature distribution; Temperature sensors; Wireless sensor networks; CMOS integrated circuits; Low-voltage low-power; Quasi-digital output; Smart sensors; Supply voltage independence; Temperature-to-frequency; WSN;
Conference_Titel :
Industrial Technology (ICIT), 2015 IEEE International Conference on
Conference_Location :
Seville
DOI :
10.1109/ICIT.2015.7125591
