| Autor: |
Aita, AL, Pertijs, M.A.P., Makinwa, K.A.A., Huijsing, J.H., Meijer, G.C.M. |
| Jazyk: |
angličtina |
| Rok vydání: |
2013 |
| Předmět: |
|
| Zdroj: |
IEEE Sensors Journal, 13(5) |
| ISSN: |
1530-437X |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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