A ± 36A Integrated Current-Sensing System with 0.3% Gain Error and 400μA Offset from −55°C to +85°C

Conference paper (2016)

Authors

S. Heidary Shalmany Electronic Instrumentation - EEMCS
D. Draxelmayr Infineon Technologies
K.A.A. Makinwa Microelectronics
Research Group
Electronic Instrumentation (EEMCS) (TU Delft)
Calibration Standards Temperature measurement System-on-chip Temperature distribution Lead Cascading style sheets
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Published Date

15-06-2016

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronic Instrumentation

Abstract

This paper presents an integrated shunt-based current-sensing system (CSS) capable of handling ±36A currents, the highest ever reported. It also achieves 0.3% gain error and 400μA offset, which is significantly better than the state-of-the-art. The heart of the system is a robust 260μΩ shunt made from the lead-frame of a standard HVQFN plastic package. The resulting voltage drop is then digitized by a ΔΣ ADC and a bandgap reference (BGR). At the expense of current handling capability, a ±5A version of the CSS uses a 10mΩ on-chip metal shunt to achieve just 4μA offset. Both designs were realized in a standard 0.13μm CMOS process.