A 1.1 µW CMOS Smart Temperature Sensor with an Inaccuracy of ±0.2oC (3σ) for Clinical Temperature Monitoring

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	A 1.1 µW CMOS Smart Temperature Sensor with an Inaccuracy of ±0.2oC (3σ) for Clinical Temperature Monitoring
	Law, M. K.; Lu, S.; Wu, T.; Bermak, A.; Mak, P. I.; Martins, R. P.
	2016-02-01
Source Publication	IEEE Sensors Journal
ISSN	1530-437X
Pages	2272-2281
Abstract	In this paper, an ultra-low power, high accuracy CMOS smart temperature sensor customized for clinical temperature monitoring based on substrate p-n-p bipolar junction transistors (BJTs) is presented. A power efficient analog front end with a sensing-range customized multi-ratio pre-gain stage is proposed to effectively utilize the input range of the incremental analog-to-digital converter to relax the conversion speed and resolution requirement. A block-based data weighted averaging technique is also proposed to achieve highly accurate pre-gain ratios while significantly reducing the implementation complexity. The complete temperature sensor is implemented in a standard 0.18 μm CMOS process occupying an active area of 0.198 mm^2. Measurement results from 20 test chips show that an inaccuracy of ± 0.2 °C (3σ ) is achieved from 25 °C to 45 °C after one-point calibration. The average power consumption is 1.1 μW at a conversion speed of 2 Sa/s.
Keyword	Smart temperature sensor ultra-low power high accuracy incremental analog-to-digital converter (I-ADC) multi-ratio pre-gain block-based data weighted averaging (BDWA)
URL	View the original
Language	英語English
The Source to Article	PB_Publication
PUB ID	19434
Document Type	Journal article
Collection	University of Macau
Corresponding Author	Law, M. K.
Recommended Citation GB/T 7714	Law, M. K.,Lu, S.,Wu, T.,et al. A 1.1 µW CMOS Smart Temperature Sensor with an Inaccuracy of ±0.2oC (3σ) for Clinical Temperature Monitoring[J]. IEEE Sensors Journal, 2016, 2272-2281.
APA	Law, M. K.., Lu, S.., Wu, T.., Bermak, A.., Mak, P. I.., & Martins, R. P. (2016). A 1.1 µW CMOS Smart Temperature Sensor with an Inaccuracy of ±0.2oC (3σ) for Clinical Temperature Monitoring. IEEE Sensors Journal, 2272-2281.
MLA	Law, M. K.,et al."A 1.1 µW CMOS Smart Temperature Sensor with an Inaccuracy of ±0.2oC (3σ) for Clinical Temperature Monitoring".IEEE Sensors Journal (2016):2272-2281.

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