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

Journal article (2018)

Authors

L. Xu Electronic Instrumentation -

S. Heidary Shalmany SiTime

J.H. Huijsing Electronic Instrumentation -

K.A.A. Makinwa Microelectronics

Research Group

Electronic Instrumentation () (TU Delft)

DOI: https://doi.org/10.1109/LSSC.2018.2855407

Temperature sensor Temperature compensation Current sensor High voltage (HV) High-side current sensing Shunt resistor ΔΣ ADC

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http://resolver.tudelft.nl/uuid:d4d82f37-acf4-4287-94ec-966e87634ecd

Published Date

2018

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronic Instrumentation

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.

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