A ± 12-A High-Side Current Sensor With 25 V Input CM Range and 0.35% Gain Error From −40 °C to 85 °C

Long Xu, Saleh Heidary Shalmany, Johan H. Huijsing, Kofi Makinwa

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)
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Abstract

This letter presents the most accurate shunt-based high-side current sensor ever reported. It achieves a 25 V input common-mode range from a single 1.8-V supply by using a beyond-the-rails ADC. A hybrid analog/digital temperature compensation scheme is proposed to simplify the circuit implementation while maintaining the state-of-the-art accuracy. Over a ±12-A current range, the sensor exhibits 0.35% gain error from -40 °C to 85 °C with 3× better power efficiency.
Original languageEnglish
Pages (from-to)94-97
Number of pages4
JournalIEEE Solid State Circuits Letters
Volume1
Issue number4
DOIs
Publication statusPublished - 2018

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.

Keywords

  • ΔΣ ADC
  • current sensor
  • high voltage (HV)
  • high-side current sensing
  • shunt resistor
  • temperature compensation
  • temperature sensor

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