A 2.18pJ/conversion, 1656um2 Temperature Sensor with a 0.61pJ K2 FoM and 52-pW Stand-By Power

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Abstract

This letter describes a miniature, ultra low power, all-dynamic temperature sensor based on a duty-cycled resistive transducer bridge and a 9-bit asynchronous SAR ADC in 65-nm CMOS. It features a novel floating bridge technique and automatic power gating to achieve the lowest reported power consumption. It consumes 2.18 pJ per conversion and has an RMS resolution of 0.53 K, leading to an FoM of 0.61 pJ·K 2 . A standby power of 52 pW allows a high power-efficiency, even at low sample rates. It occupies 36×46 μm of chip area and has a sensing range from -20 °C to 120 °C.

Original languageEnglish
Article number9129838
Pages (from-to)82-85
Number of pages4
JournalIEEE Solid-State Circuits Letters
Volume3
DOIs
Publication statusPublished - 2020

Keywords

  • Duty-cycling
  • dynamic
  • Internet-of-Things (IoT)
  • low power
  • power gating
  • resistive bridge
  • SAR ADC
  • temperature sensor

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