An Energy-Efficient BJT-Based Temperature-to-Digital Converter with ±0.13°C (3σ) Inaccuracy from -40 to 125°C
2019 IEEE Asian Solid-State Circuits Conference (A-SSCC)(2019)
摘要
This paper describes an energy-efficient BJT-based temperature-to-digital converter (TDC) with a state-of-the-art resolution FoM (RFoM) of 5.4pJ·K
2
. It consists of a BJT front-end, a capacitively-coupled instrumentation amplifier (CCIA) and a 2nd-order continuous-time (CT) ΔΣADC. The front-end and the CCIA employ bitstream-controlled dynamic element matching (DEM) and chopping to mitigate mismatch and 1/f noise without incurring quantization noise fold-back. The sensor achieves ±0.13°C (3σ) inaccuracy from -40 to 125°C and has a supply sensitivity of 8.2mK/V.
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关键词
sensor,supply sensitivity,1/f noise mitigation,mismatch mitigation,DEM,bitstream-controlled dynamic element matching,CT ΔΣ ADC,CCIA,TDC,2nd-order continuous-time ΔΣ-ADC,BJT front-end,resolution FoM,energy-efficient BJT-based temperature-to-digital converter,temperature -40.0 degC to 125.0 degC
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