magnetic field sensors current sensor kmc 05 sensors in thin film technology hl-planartechnik gmbh hauert 13, d - 44 227 dortmund, tel.: +49 (0) 231/97400, fax.: +49 (0) 231/974020 internet: http://www.hlplanar.com e-mail: service@hlplanar.de function principle magnetoresistive materials can change their resistivity in an external magnetic field. the variation of the resistivity is determined by the rotation of magnetisation with respect to the direction of the current flow. permalloy ( ni 81 fe 19 ) is commercially used as magnetoresistive material. the relative change of resistivity is 2-3 % for this material. the high sensitive and small size sensor consists of a silicon chip coated with thin film permalloy stripes. these stripes form a wheatstone bridge, whose output voltage depends on the magnetic field. characteristic the sensor chip measures the magnetic field generated by an internal current-carrying conductor. the current sensor has an integrated permanent magnet. no external auxiliary field h x is required. a direct or alternating current i m up to 5 a can be detected. package: mod. sm-8 www.datasheet.in
magnetic field sensors current sensor kmc 05 sensors in thin film technology hl-planartechnik gmbh hauert 13, d - 44 227 dortmund, tel.: +49 (0) 231/97400, fax.: +49 (0) 231/974020 internet: http://www.hlplanar.com e-mail: service@hlplanar.de technical data test conditions for input-output insulation: 200v dc for 50ms between pin 3 and pin 2 absolute maximum ratings parameter symbol unit value supply voltage v b v 12 measurable current i m a5 operating temperature range t amb c -40 ... +125 storage temperature range t stg c -65 ... +150 electrical characteristics ( t amb = 25c ) parameter symbol unit min. typ. max. bridge resistance r b kohm 1.4 1.7 2.2 offset voltage v off /v b mv/v - - 2 open circuit sensitivity s (mv/v)/a - 0.7 - resitance of the conductor r mohm - 0.7 - operating frequency f max khz - - 100 temperature coefficient of open circuit sensitivity t c %/k - - -0.3 input-output insulation i i-o na - - 100 kmc 05 output voltage v o versus current i m for an auxiliary field h x created by an internal magnet 7.12.01 www.datasheet.in
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