Print Email Facebook Twitter An Accurate BJT-Based CMOS Temperature Sensor With Duty-Cycle-Modulated Output Title An Accurate BJT-Based CMOS Temperature Sensor With Duty-Cycle-Modulated Output Author Wang, Guijie (Smartec BV) Heidari, A. (TU Delft Electronic Instrumentation) Makinwa, K.A.A. (TU Delft Microelectronics) Meijer, G.C.M. (TU Delft Electronic Instrumentation) Department Microelectronics Date 2017 Abstract This paper describes the design of a precision bipolar junction transistor based temperature sensor implemented in standard 0.7-μmCMOS technology. It employs substrate p-n-ps as sensing elements,which makes it insensitiveto the effects of mechanical (packaging) stress and facilitates the use of low-cost packaging technologies. The sensor outputs a duty-cycle-modulated signal, which can easily be interfaced to the digital world and, after low-pass filtering, to the analog world. In order to eliminate the errors caused by the component mismatch, chopping and dynamic element matching (DEM) techniques have been applied. The required component shuffling was done concurrently rather than sequentially, resulting in a fast DEM scheme that saves energy without degrading accuracy. After a singletemperature trim, the sensor’s inaccuracy is ±0.1 °C (−20 to 60 °C) and ±0.3 °C (−45 to 130 °C), respectively. Measurements of sensors in different packages show that the package-induced shift is less than 0.1 °C. Measurements of eight sensors over 367 days show that their output drift is less than 6 mK. While dissipating only 200 μW, the sensor achieves a resolution of 3 mK (rms) in a 1.8-ms measurement time, and a state-of-the-art resolution figure of merit of 3.2 pJK2. This combination of high accuracy, high resolution, high speed, and low-energy consumption makes this sensor suited for commercial and industrial applications. Subject one-point trimChoppingCMOS temperature sensorduty-cycle modulationdynamic element matching (DEM) To reference this document use: http://resolver.tudelft.nl/uuid:aec877b8-25e8-4db9-af4b-c24ad25a4f66 DOI https://doi.org/10.1109/TIE.2016.2614273 ISSN 0278-0046 Source IEEE Transactions on Industrial Electronics, 64 (2), 1572-1580 Bibliographical note Accepted author manuscript Part of collection Institutional Repository Document type journal article Rights © 2017 Guijie Wang, A. Heidari, K.A.A. Makinwa, G.C.M. Meijer Files PDF 10233947.pdf 1.09 MB Close viewer /islandora/object/uuid:aec877b8-25e8-4db9-af4b-c24ad25a4f66/datastream/OBJ/view