A Resistor-Based High-Resolution Temperature-to-Digital Converter

Rui Song Lee, Chak Hong Lam, Wei Hao Chen, Chi Feng Liu, Cheng Yen Tsai, Ching Ju Lu, Chia Hung Chen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper presents a resistor-based high-resolution temperature-to-digital converter with an energy-efficient incremental delta-sigma analog-to-digital converter (IADC), implemented by hybrid continuous-time and discrete-time circuits. To reduce the flicker noise, the chopper switches are incorporated in the 1st -integrator. To further mitigate the degradation caused by the chopper, a finite impulse response (FIR) digital-to-analog converters (DAC) is added in the feedback loop filter to create frequency notches and eliminate the aliasing of the out-of-band noise due to chopping frequency. The proposed circuit is implemented in 180-nm CMOS process and, and the overall circuit consumes 166μ W from a 1.8 V power supply. The measured temperature resolution is less than 7.7 m°C(1σ) in 0.1 ms, which corresponds to a resolution figure of merit (FoM) of 0.984

Original languageEnglish
Title of host publication2024 International VLSI Symposium on Technology, Systems and Applications, VLSI TSA 2024 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798350360349
DOIs
StatePublished - 2024
Event2024 International VLSI Symposium on Technology, Systems and Applications, VLSI TSA 2024 - Hsinchu, Taiwan
Duration: 22 Apr 202425 Apr 2024

Publication series

Name2024 International VLSI Symposium on Technology, Systems and Applications, VLSI TSA 2024 - Proceedings

Conference

Conference2024 International VLSI Symposium on Technology, Systems and Applications, VLSI TSA 2024
Country/TerritoryTaiwan
CityHsinchu
Period22/04/2425/04/24

Keywords

  • ADC
  • analog-to-digital converter
  • chopper
  • continuous-time
  • DAC
  • delta sigma modulator
  • discrete-time delta-sigma modulator
  • finite impulse response
  • FIR
  • incremental ADC
  • incremental analog-to-digital converter
  • temperature sensor

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