CMOS microsystem for AC current measurement with galvanic isolation

Author

Frick, VIncent ; Hebrard, Luc ; Poure, Philippe ; Anstotz, Freddy ; Braun, Francis

Author_Institution

LEPSI, Univ. Louis Pasteur, Strasbourg, France

Volume

2

fYear

2002

fDate

2002

Firstpage

1445

Abstract

In this paper, we present an integrated AC current sensor based on sensitivity-optimised horizontal Hall effect devices (HHDs) and a differential readout chain. It has been designed for 5A nominal AC current measurement with 5 kV galvanic isolation and 0.5% accuracy over 1.5 kHz bandwidth, which allows up to 30^th (25 th) harmonic detection in 50 Hz (60 Hz) applications. From the sensing element to the instrumental chain´s output the signal conditioning is exclusively performed by low-noise standard CMOS analog blocks. Moreover the whole microsystem features a mixed signal structure dedicated to auto-balancing.

Keywords

CMOS integrated circuits; Hall effect transducers; electric current measurement; microsensors; mixed analogue-digital integrated circuits; 1.5 kHz; 5 A; 5 kV; 50 Hz; 60 Hz; AC current measurement; CMOS microsystem; HHDs; auto-balancing; differential readout chain; galvanic isolation; harmonic detection; integrated AC current sensor; low-noise standard CMOS analog blocks; mixed signal structure; sensitivity-optimised horizontal Hall effect devices; signal conditioning; CMOS technology; Current measurement; Electromagnetic compatibility; Galvanizing; Hall effect; Hall effect devices; Instruments; Isolation technology; Magnetic field measurement; Packaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensors, 2002. Proceedings of IEEE

Print_ISBN

0-7803-7454-1

Type

conf

DOI

10.1109/ICSENS.2002.1037335

Filename

1037335