A low power 16-channel fully integrated GMR-based current sensor

Author

Rothan, F. ; Condemine, C. ; Delaet, B. ; Redon, O. ; Giraud, A.

Author_Institution

CEA-LETI, Grenoble, France

fYear

2012

fDate

17-21 Sept. 2012

Firstpage

245

Lastpage

248

Abstract

Isolated current and voltage sensors are key components in hybrid or electrical vehicles. For such applications, a low power 16-channel current sensor with 12-bit resolution at 3kS/s per channel and 1.5kV isolation has been developed. It is based on the cointegration of spin-valve Giant MagnetoResistance (GMR) thin-film technology and CMOS technology in one ASIC. Current measurements have been performed with less than 3.5% peak-to-peak non-linearity over a 1 to 20mA current range. The signal BW ranges from DC to 500Hz, and the readout circuit power consumption is only 182μW per channel.

Keywords

CMOS integrated circuits; application specific integrated circuits; electric current measurement; electric sensing devices; giant magnetoresistance; low-power electronics; magnetic sensors; magnetic thin film devices; ASIC; CMOS technology; current 1 mA to 20 mA; current measurements; electrical vehicles; frequency 0 Hz to 500 Hz; low power 16-channel fully integrated GMR-based current sensor; spin-valve giant magnetoresistance thin-film technology; voltage 1.5 kV; voltage sensors; Bridge circuits; CMOS integrated circuits; Current measurement; Fuel cells; Monitoring; Resistance; Voltage measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

ESSCIRC (ESSCIRC), 2012 Proceedings of the

Conference_Location

Bordeaux

ISSN

1930-8833

Print_ISBN

978-1-4673-2212-6

Electronic_ISBN

1930-8833

Type

conf

DOI

10.1109/ESSCIRC.2012.6341304

Filename

6341304