3.7 A 620µW BJT-Based Temperature-to-Digital Converter with 0.65mK Resolution and FoM of 190fJ·K2

Temperature-to-digital converters (TDC) are used for temperature compensation of high-stability MEMS oscillators [1, 2]. Such TDCs must achieve high resolution and high conversion rates in the kHz range to minimize temperature compensation impact on phase noise and frequency stability in a thermally...

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Bibliographic Details
Published in2020 IEEE International Solid- State Circuits Conference - (ISSCC) pp. 70 - 72
Main Authors Shalmany, Saleh Heidary, Souri, Kamran, Sonmez, Uaur, Souri, Kianoush, D'Urbino, Michele, Hussaini, Said, Tauro, Darryl, Tabatabaei, Sassan
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.02.2020
Subjects
1/f noise
Iron
Oscillators
Resistors
Temperature distribution
Temperature sensors
Thermal stability
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Summary:Temperature-to-digital converters (TDC) are used for temperature compensation of high-stability MEMS oscillators [1, 2]. Such TDCs must achieve high resolution and high conversion rates in the kHz range to minimize temperature compensation impact on phase noise and frequency stability in a thermally dynamic environment, experiencing thermal ramps of 10°Cs or higher. This work achieves a resolution of 0.65mK rms in a conversion time of 0.72ms while drawing 550µA from a 1.125V supply. This corresponds to a resolution FOM of 190fJ.K 2 , improving energy-efficiency of state-of-the-art BJT-based sensors by 20× [3-6].
ISSN:2376-8606
DOI:10.1109/ISSCC19947.2020.9063007