Print Email Facebook Twitter Low-Power CMOS Smart Temperature Sensor With a Batch-Calibrated Inaccuracy of ±0.25 °C (±3σ) from −70 °C to 130 °C Title Low-Power CMOS Smart Temperature Sensor With a Batch-Calibrated Inaccuracy of ±0.25 °C (±3σ) from −70 °C to 130 °C Author Aita, AL (TU Delft Electronic Instrumentation) Pertijs, M.A.P. (TU Delft Electronic Instrumentation) Makinwa, K.A.A. (TU Delft Electronic Instrumentation) Huijsing, J.H. (TU Delft Electronic Instrumentation) Meijer, G.C.M. (TU Delft Electronic Instrumentation) Date 2013 Abstract In this paper, a low-power CMOS smart temperature sensor is presented. The temperature information extracted using substrate PNP transistors is digitized with a resolution of 0.03 °C using a precision switched-capacitor (SC) incremental A/D converter. After batch calibration, an inaccuracy of ±0.25 °C (±3σ ) from −70 °C to 130 °C is obtained. This represents a two-fold improvement compared to the state-ofthe-art. After individual calibration at room temperature, aninaccuracy better than ±0.1 °C over the military temperature range is obtained, which is in-line with the state-of-the-art. This performance is achieved at a power consumption of 65 μW during a measurement time of 100 ms, by optimizing the power/inaccuracy tradeoffs, and by employing a clock frequencyproportional to absolute temperature. The latter ensures accurate settling of the SC input stage at low temperatures, and reduces the effects of leakage currents at high temperatures. Subject $\Delta\Sigma$A/D conversionbatch calibrationsmart temperature sensorssubstrate PNP transistors To reference this document use: http://resolver.tudelft.nl/uuid:0e046089-e2bb-4d07-a11e-387f8661ebb9 DOI https://doi.org/10.1109/JSEN.2013.2244033 ISSN 1530-437X Source IEEE Sensors Journal, 13 (5), 1840-1848 Part of collection Institutional Repository Document type journal article Rights © 2013 AL Aita, M.A.P. Pertijs, K.A.A. Makinwa, J.H. Huijsing, G.C.M. Meijer Files PDF 2000680_JSEN2244033.pdf 810.71 KB Close viewer /islandora/object/uuid:0e046089-e2bb-4d07-a11e-387f8661ebb9/datastream/OBJ/view