A time-to-digital-converter-based CMOS smart temperature sensor

Chun Chi Chen; Wen Fu Lu; Chin Chung Tsai; Poki Chen

doi:10.1109/ISCAS.2005.1464649

A time-to-digital-converter-based CMOS smart temperature sensor

Chun Chi Chen, Wen Fu Lu, Chin Chung Tsai, Poki Chen^*

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

10 Citations (Scopus)

Abstract

A time-to-digital-converter-based CMOS smart temperature sensor is proposed for high-accuracy portable applications. Conventional smart temperature sensors rely on analog-to-digital converter, which consumes much chip area and operation power, for digital output code conversion. For the purpose of cost reduction and power saving, the proposed smart temperature sensor first generates a pulse with a width proportional to the measured temperature. Then, a cyclic time-to-digital converter (TDC) is utilized to convert the pulse into the corresponding digital code. The test chips with extremely small area of 0.175mm2 were fabricated by TSMC CMOS 0.35um 2P4M process. Due to the excellent linearity of the digital output, the achieved measurement error is merely -0.6̃+0.8°C without any curvature correction or dynamic offset-cancellation. The effective resolution is better than 0.15°C, and the power consumption is 10μW.

Original language	English
Article number	1464649
Pages (from-to)	560-563
Number of pages	4
Journal	Proceedings - IEEE International Symposium on Circuits and Systems
DOIs	https://doi.org/10.1109/ISCAS.2005.1464649
Publication status	Published - 2005
Externally published	Yes
Event	IEEE International Symposium on Circuits and Systems 2005, ISCAS 2005 - Kobe, Japan Duration: 2005 May 23 → 2005 May 26

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1109/ISCAS.2005.1464649

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title = "A time-to-digital-converter-based CMOS smart temperature sensor",

abstract = "A time-to-digital-converter-based CMOS smart temperature sensor is proposed for high-accuracy portable applications. Conventional smart temperature sensors rely on analog-to-digital converter, which consumes much chip area and operation power, for digital output code conversion. For the purpose of cost reduction and power saving, the proposed smart temperature sensor first generates a pulse with a width proportional to the measured temperature. Then, a cyclic time-to-digital converter (TDC) is utilized to convert the pulse into the corresponding digital code. The test chips with extremely small area of 0.175mm2 were fabricated by TSMC CMOS 0.35um 2P4M process. Due to the excellent linearity of the digital output, the achieved measurement error is merely -0.{\~6}+0.8°C without any curvature correction or dynamic offset-cancellation. The effective resolution is better than 0.15°C, and the power consumption is 10μW.",

author = "Chen, {Chun Chi} and Lu, {Wen Fu} and Tsai, {Chin Chung} and Poki Chen",

year = "2005",

doi = "10.1109/ISCAS.2005.1464649",

language = "English",

pages = "560--563",

journal = "Proceedings - IEEE International Symposium on Circuits and Systems",

issn = "0271-4310",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

note = "IEEE International Symposium on Circuits and Systems 2005, ISCAS 2005 ; Conference date: 23-05-2005 Through 26-05-2005",

}

TY - JOUR

T1 - A time-to-digital-converter-based CMOS smart temperature sensor

AU - Chen, Chun Chi

AU - Lu, Wen Fu

AU - Tsai, Chin Chung

AU - Chen, Poki

PY - 2005

Y1 - 2005

N2 - A time-to-digital-converter-based CMOS smart temperature sensor is proposed for high-accuracy portable applications. Conventional smart temperature sensors rely on analog-to-digital converter, which consumes much chip area and operation power, for digital output code conversion. For the purpose of cost reduction and power saving, the proposed smart temperature sensor first generates a pulse with a width proportional to the measured temperature. Then, a cyclic time-to-digital converter (TDC) is utilized to convert the pulse into the corresponding digital code. The test chips with extremely small area of 0.175mm2 were fabricated by TSMC CMOS 0.35um 2P4M process. Due to the excellent linearity of the digital output, the achieved measurement error is merely -0.6̃+0.8°C without any curvature correction or dynamic offset-cancellation. The effective resolution is better than 0.15°C, and the power consumption is 10μW.

AB - A time-to-digital-converter-based CMOS smart temperature sensor is proposed for high-accuracy portable applications. Conventional smart temperature sensors rely on analog-to-digital converter, which consumes much chip area and operation power, for digital output code conversion. For the purpose of cost reduction and power saving, the proposed smart temperature sensor first generates a pulse with a width proportional to the measured temperature. Then, a cyclic time-to-digital converter (TDC) is utilized to convert the pulse into the corresponding digital code. The test chips with extremely small area of 0.175mm2 were fabricated by TSMC CMOS 0.35um 2P4M process. Due to the excellent linearity of the digital output, the achieved measurement error is merely -0.6̃+0.8°C without any curvature correction or dynamic offset-cancellation. The effective resolution is better than 0.15°C, and the power consumption is 10μW.

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JO - Proceedings - IEEE International Symposium on Circuits and Systems

JF - Proceedings - IEEE International Symposium on Circuits and Systems

M1 - 1464649

T2 - IEEE International Symposium on Circuits and Systems 2005, ISCAS 2005

Y2 - 23 May 2005 through 26 May 2005

ER -

A time-to-digital-converter-based CMOS smart temperature sensor

Abstract

ASJC Scopus subject areas

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