23.2 A 40 A Shunt-Based Current Sensor with ±0.2% Gain Error from -40°C to 125°C and Self-Calibration

Zhong Tang, Nandor G. Toth, Roger Zamparette, Tomohiro Nezuka, Yoshikazu Furuta, Kofi A.A. Makinwa

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

2 Citations (Scopus)
85 Downloads (Pure)

Abstract

Low-cost metal (e.g., PCB trace) shunts can be used to make accurate current sensors (< 1 % gain error) [1-3]. However, their reported maximum operating temperature (85 circC) is not high enough for automotive applications, and at higher temperatures, shunt resistance may exhibit increased drift, especially at high current levels. This paper presents a metal-shunt-based current sensor with a wide temperature range and a stable on-chip reference current (I textREF) source for shunt self-calibration. By employing a continuous-time (CT) front-end, it achieves an input noise density of 14textnV/sqrttextHz while consuming only 280mu A, making it > 10times more energy efficient than prior art [1], [2], with comparable gain error (pm0.2%) over a wider current (pm 40A) and temperature (-40 circC to 125 circC) range.

Original languageEnglish
Title of host publication2023 IEEE International Solid-State Circuits Conference, ISSCC 2023
PublisherIEEE
Pages348-350
Number of pages3
ISBN (Electronic)9781665428002
DOIs
Publication statusPublished - 2023
Event2023 IEEE International Solid-State Circuits Conference, ISSCC 2023 - Virtual, Online, United States
Duration: 19 Feb 202323 Feb 2023

Publication series

NameDigest of Technical Papers - IEEE International Solid-State Circuits Conference
Volume2023-February
ISSN (Print)0193-6530

Conference

Conference2023 IEEE International Solid-State Circuits Conference, ISSCC 2023
Country/TerritoryUnited States
CityVirtual, Online
Period19/02/2323/02/23

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

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