data sheet 1 2000-07-01 double differential magneto resistor fp 410 l (4 x 80) fm version 2.0 dimensions in mm features ? double differential magneto resistor on same carrier ? accurate intercenter spacing ? high operating temperature range ? high output voltage ? compact construction ? available in strip form for automatic assembly type ordering code fp 410 l (4 80) fm q65410-l80e (taped) fp 410 l (4 80) fm q65110-l80f (singular) typical applications ? incremental angular encoders ? detection of sense of rotation ? detection of speed ? detection of position
data sheet 2 2000-07-01 fp 410 l (4 x 80) fm the double differential magneto resistor assembly consists of two pairs of magneto resistors, (l-type insb/nisb semiconductor resistors whose resistance value can be magnetically controlled), which are fixed to a ferrite substrate. contact to the magneto resistors is achieved using a copper/polyimide carrier film known as micropack. the basic resistance of each of the magnetic resistors is 80 w . the two series coupled pairs of magnetic resistors are actuated by an external magnetic field or can be biased by a permanent magnet and actuated by a soft iron target.
data sheet 3 2000-07-01 fp 410 l (4 x 80) fm absolute maximum ratings electrical characteristics ( t a = 25 c) parameter symbol limit values unit operating temperature t a C 40 / + 175 c storage temperature t stg C 40 / + 185 c power dissipation 1) p tot 1000 mw supply voltage 2) ( b = 0.3 t) v in 8v thermal conductivity Cattached to heatsink Cin still air g th case g th a 3 20 2 mw/k basic resistance ( i 1 ma; b = 0 t) r 01-3 r 04-6 110 ? 220 w center symmetry 3) m 6% relative resistance change ( r = r 01-3 , r 04-6 at b = 0 t) b = 0.3 t 4) b = 1 t r b / r 0 > 1.7 > 7 C temperature coefficient b = 0 t b = 0.3 t b = 1 t tc r C 0.16 C 0.38 C 0.54 %/k %/k %/k 1) corresponding to diagram p tot = f ( t case ) 2) corresponding to diagram v in = f ( t case ) 3) 4) 1 t = 1 tesla = 10 4 gauss m r 01 2 C r 02 3 C C r 01 2 C -------------------------------- = 100% for r 01-2 > r 02-3 m r 04 5 C r 05 6 C C r 04 5 C -------------------------------- = 100% for r 04-5 > r 05-6
data sheet 4 2000-07-01 fp 410 l (4 x 80) fm max. power dissipation versus temperature p tot = f ( t ), t = t case , t a typical mr resistance versus temperature r 01-3, 4-6 = f ( t a ), b = parameter maximum supply voltage versus temperature v in 1-3, 4-6 = f ( t ), b = 0.3 t typical mr resistance versus magnetic induction b r 01-3, 4-6 = f ( b ), t a = 25 c
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