Publication

A 0.0251 mm2Temperature Sensor Achieving a ±0.25 °C (3σ) Inaccuracy From –40 °C to 125 °C Without Backend Nonlinearity Correction

2026

Abstract

This paper presents a compact, high-accuracy and scalable on-chip temperature sensor (TS) optimized for low-power embedded applications, such as system-on-chip (SoC) and microprocessor thermal monitoring. The proposed TS employs a capacitive-biased-diode (CBD) structure enhanced by an adaptive discharging period (ADP) technique to achieve high sensitivity and linearity without additional backend calibration. The CBD sensor output is digitized by an oversampling (OS) successive approximation register (SAR) ADC with custom vertical metal-oxide-metal (VMOM) capacitors and a mismatch error shaping (MES) technique, providing high accuracy in a minimized chip area. Additionally, a discharging clock chopping (DCC) technique is proposed to effectively suppresses low-frequency noise with minimal switch noise, while clock boosters are implemented to decrease the ON-resistance of switches, reducing nonlinearity effects. Fabricated in a standard CMOS 180nm process, the sensor occupies only 0.0251 mm2 and consumes 3.6 µW. It achieves a one-point trimmed inaccuracy of ±0.25°C over a temperature range of −40°C to 125°C.

Official source

https://infoscience.epfl.ch/entities/publication/6b0c515d-cd3a-4fdf-821b-9b4e4da07e2c

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2026

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/6b0c515d-cd3a-4fdf-821b-9b4e4da07e2c

About this result

Related concepts (32)

System on a chip

A system on a chip or system-on-chip (SoC ,ˈɛsoʊsiː; pl. SoCs ,ˈɛsoʊsiːz) is an integrated circuit that integrates most or all components of a computer or other electronic system. These components almost always include on-chip central processing unit (CPU), memory interfaces, input/output devices, input/output interfaces, and secondary storage interfaces, often alongside other components such as radio modems and a graphics processing unit (GPU) – all on a single substrate or microchip.

Embedded system

An embedded system is a computer system—a combination of a computer processor, computer memory, and input/output peripheral devices—that has a dedicated function within a larger mechanical or electronic system. It is embedded as part of a complete device often including electrical or electronic hardware and mechanical parts. Because an embedded system typically controls physical operations of the machine that it is embedded within, it often has real-time computing constraints. Embedded systems control many devices in common use.

Atom (system on a chip)

Atom is a system on a chip (SoC) platform designed for smartphones and tablet computers, launched by Intel in 2012. It is a continuation of the partnership announced by Intel and Google on September 13, 2011 to provide support for the Android operating system on Intel x86 processors. This range competes with existing SoCs developed for the smartphone and tablet market from companies such as Texas Instruments, Nvidia, Qualcomm and Samsung.

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A 0.0251 mm2Temperature Sensor Achieving a ±0.25 °C (3σ) Inaccuracy From –40 °C to 125 °C Without Backend Nonlinearity Correction

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