Title :
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
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;
Conference_Titel :
ESSCIRC (ESSCIRC), 2012 Proceedings of the
Conference_Location :
Bordeaux
Print_ISBN :
978-1-4673-2212-6
Electronic_ISBN :
1930-8833
DOI :
10.1109/ESSCIRC.2012.6341304
