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

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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

Keywords

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

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