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EnglishA low power smart temperature sensor followed by an SC amplifier, buffer stage and a 12bit Successive-Approximation analogue-digital converter (ADC) for autonomous multi-sensor systems is presented. The proposed design is accurate within 0.1C over the temperature range of 55°C to 125°C. A PTAT source like the one presented in [1] was used as a high accuracy temperature sensor. The read-out enables a differential reading of the reference and actual temperature. The succeeding ADC digitizes the output with a bit-clock of 50-kHz. The power consumption with a 1.2V supply is 0.1μW. The ADC has a Figure-of-Merit of 66 fJ/conversion-step. The whole system is implemented in the NXP CMOS 0.14m technology. The die area is 0.27 mmp2 and the whole system consumes less than 16μW.
| Autori: | ||
| Titolo: | Low Power Smart Sensor for Accurate Temperature Measurements | |
| Data di pubblicazione: | 2011 | |
| Nome del convegno: | 4th IEEE International Workshop on Advances in Sensors and Interfaces, IWASI 2011 | |
| ISBN: | 978-1-4577-0623-3 | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1109/IWASI.2011.6004690 | |
| Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |
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http://hdl.handle.net/11589/18748
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