A DTMOST-based Temperature Sensor with 3σ Inaccuracy of ±0.9°C for Self-Refresh Control in 28nm Mobile DRAM

Sunsik Park, Yunhong Kim, Woojun Choi, Yongtae Lee, Sungbeen Kim, Youngmin Shin, Youngcheol Chae

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents a compact temperature sensor that directly controls a temperature-dependent self-refresh period of a mobile DRAM in 28nm CMOS. It uses a dynamic threshold MOST (DTMOST) as a sensing device that periodically discharges a capacitor. The discharging voltage across the capacitor denotes a supply-independent behavior and the temperature-dependent discharging period of the DTMOST diode is detected by incorporating it into a relaxation oscillator. The sensor occupies only 0.017mm2 and achieves a 3σ inaccuracy of ±0.9°C from -10 to 90°C after 1-point trim. Operating from 0.85 to 1.15V, it shows a low supply sensitivity of 0.27°C/V at room temperature. It consumes 33.75μW and achieves a resolution of 10.2mK. This corresponds to a resolution FoM of 0.36pJ· K2.

Original languageEnglish
Title of host publication2020 IEEE Custom Integrated Circuits Conference, CICC 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728160313
DOIs
Publication statusPublished - 2020 Mar
Event2020 IEEE Custom Integrated Circuits Conference, CICC 2020 - Boston, United States
Duration: 2020 Mar 222020 Mar 25

Publication series

NameProceedings of the Custom Integrated Circuits Conference
Volume2020-March
ISSN (Print)0886-5930

Conference

Conference2020 IEEE Custom Integrated Circuits Conference, CICC 2020
CountryUnited States
CityBoston
Period20/3/2220/3/25

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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    Park, S., Kim, Y., Choi, W., Lee, Y., Kim, S., Shin, Y., & Chae, Y. (2020). A DTMOST-based Temperature Sensor with 3σ Inaccuracy of ±0.9°C for Self-Refresh Control in 28nm Mobile DRAM. In 2020 IEEE Custom Integrated Circuits Conference, CICC 2020 [9075873] (Proceedings of the Custom Integrated Circuits Conference; Vol. 2020-March). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CICC48029.2020.9075873