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A 0.12mm2 7.4μW micropower temperature sensor with an inaccuracy of ±0.2°C (3σ) from −30°C to 125°C

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2 Author(s)
Kamran Souri ; Electronic Instrumentation Laboratory / DIMES, Delft University of Technology, Delft, The Netherlands ; Kofi Makinwa

A temperature sensor intended for RFID applications has been realized in a 0.16μm standard CMOS process. After a single digital trim at 30°C, it achieves an inaccuracy of ±0.2°C (3σ) over the temperature range: -30°C to 125°C. At a conversion rate of 10Hz, it achieves a resolution of 15mK. The sensor is compact, occupying only 0.12mm2, and power efficient, drawing 4.6μA from a 1.6V to 2V supply, which corresponds to a minimum power dissipation of 7.4μW, the lowest ever reported for a precision temperature sensor.

Published in:

ESSCIRC, 2010 Proceedings of the

Date of Conference:

14-16 Sept. 2010