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Multi-range, ultra-lower power, -20 to 60°C CMOS smart temperature sensor with ±0.1°C accuracy
Lu S.2; Law M.-K.2; Mak P.-I.2; Martins R.P.1,2
2015-08-14
Conference Name2015 International Symposium on Signals, Circuits and Systems (ISSCS)
Source PublicationISSCS 2015 - International Symposium on Signals, Circuits and Systems
Conference DateJUL 09-10, 2015
Conference PlaceIasi, ROMANIA
Abstract

This paper presents a multi-range ultra-lower power high accuracy CMOS smart temperature sensor based on substrate BJTs and a first-order incremental delta-sigma analog-to-digital converter (ΔΣ-ADC) targeting on applications where accuracy and power have higher priority over the sensing range and speed requirement. By using a reconfigurable pre-gain stage, the input range of the ΔΣ-ADC can be optimized for different application specific temperature sub-ranges, relaxing the resolution as well as power requirements for subsequent analog-to-digital conversion. High accuracy with reduced control circuit complexity is achieved through the use of dynamic element match (DEM) and multi-cycle integration. The proposed CMOS temperature sensor is designed for three temperature sub-ranges (-20°C to 7°C, 5°C to 35°C, and 33°C to 60°C) using a standard 0.18μm CMOS technology. An inaccuracy of ±0.1°C is achieved in all the three sub-ranges using only one-point calibration while consuming 1μW.

DOI10.1109/ISSCS.2015.7203921
URLView the original
Indexed BySCI
Language英语
WOS Research AreaComputer Science ; Engineering
WOS SubjectComputer Science, Theory & Methods ; Engineering, Electrical & Electronic
WOS IDWOS:000380451600001
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Document TypeConference paper
CollectionINSTITUTE OF MICROELECTRONICS
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Affiliation1.Instituto Superior Técnico
2.Universidade de Macau
Recommended Citation
GB/T 7714
Lu S.,Law M.-K.,Mak P.-I.,et al. Multi-range, ultra-lower power, -20 to 60°C CMOS smart temperature sensor with ±0.1°C accuracy[C],2015.
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