A 174 pW-488.3 nW 1 S/s-100 kS/s all-dynamic resistive temperature sensor with speed/resolution/resistance adaptability

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Abstract

A versatile resistive temperature sensor for Internet-of-Things is presented, based on an all-dynamic architecture. This allows efficient scaling of power with conversion rate, enables optional oversampling for an adaptable resolution, and provides efficient adaptability to different resistor values. A new double-sided measurement mode is proposed to compensate for offset, 1/f noise and nonidealities at system level. The sensor achieves a minimum power consumption of 174 pW at 1 S/s measurement rate, which scales up to 488.3 nW at 100 kS/s. It offers a nominal rms resolution of 0.61 °C and a resolution FoM as low as 1.82 pJ °C2.

Original languageEnglish
Article number08340145
Pages (from-to)70-73
Number of pages4
JournalIEEE Solid-State Circuits Letters
Volume1
Issue number3
DOIs
Publication statusPublished - Mar 2018

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Keywords

  • Duty-cycling
  • Dynamic
  • Internet-of-Things (IoT)
  • Resistive bridge
  • SAR ADC
  • Temperature sensor

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