A resistor-based temperature sensor for a real time clock with #x00B1;2ppm frequency stability. Park, P., Makinwa, K., & Ruffieux, D. In European Solid State Circuits Conference (ESSCIRC), ESSCIRC 2014 - 40th, pages 391–394, September, 2014.
doi  abstract   bibtex   
A temperature sensor based on the temperature-dependence of integrated poly-silicon resistors is used to stabilize the quartz-crystal of a 131kHz real-time clock (RTC). After a 3-point calibration, the sensor achieves an inaccuracy of less than ±0.12°C (min-max) from -40°C to 85°C, which translates into a frequency stability of less than ±2ppm. The sensor also achieves 2.8mK (rms) resolution in a 32ms conversion time, which corresponds to a state-of-the-art resolution FOM of 8pJK2.
@inproceedings{park_resistor-based_2014,
	title = {A resistor-based temperature sensor for a real time clock with \#x00B1;2ppm frequency stability},
	doi = {10.1109/ESSCIRC.2014.6942104},
	abstract = {A temperature sensor based on the temperature-dependence of integrated poly-silicon resistors is used to stabilize the quartz-crystal of a 131kHz real-time clock (RTC). After a 3-point calibration, the sensor achieves an inaccuracy of less than ±0.12°C (min-max) from -40°C to 85°C, which translates into a frequency stability of less than ±2ppm. The sensor also achieves 2.8mK (rms) resolution in a 32ms conversion time, which corresponds to a state-of-the-art resolution FOM of 8pJK2.},
	booktitle = {European {Solid} {State} {Circuits} {Conference} ({ESSCIRC}), {ESSCIRC} 2014 - 40th},
	author = {Park, Pyoungwon and Makinwa, K.A.A. and Ruffieux, D.},
	month = sep,
	year = {2014},
	pages = {391--394}
}

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