Differential Magneto Resistor FP 412 D 250 Dimensions in mm Features Typical applications • • • • • • • • • • • Accurate intercenter spacing High operating temperature range High output voltage Signal amplitude independent of speed Compact construction Available in strip form for automatic assembly Detection of speed Detection of position Detection of sense of rotation Angular encoders Linear position sensing Type Ordering Code FP 412 D 250 Q65412-D 250 Semiconductor Group 1 07.96 FP 412 D 250 The differential magneto resistor FP 412 D 250 is a magnetically variable resistor in Dtype InSb/NiSb semiconductor material. The MR is glued onto a ferrite substrate and is supplied in a "MICROPACK" copper/polyimide film package. The basic resistance of each of the magneto resistors is 250 Ω. The series coupled MRs are actuated by an external magnetic field or can be biased by a permanent magnet and actuated by a soft iron target. Maximum ratings Parameter Symbol Value Unit Operating temperature TA Tstg Ptot VIN – 40 / +175 °C – 40 / +185 °C 1000 mW 12 V Gth case Gth A ≥ 25 1 mW/K mW/K Basic resistance (I ≤ 1 mA, B = 0 T) R01-3 370…630 Ω Center symmetry3) M RB/R0 ≤ 10 % > 2.8 > 12 – – – 1.8 – 2.7 – 2.9 %/K %/K %/K Storage temperature Power dissipation1) Supply voltage2)(B = 0.2 T) Thermal conductivity –attached to heatsink –in still air Characteristics (TA = 25 °C) Relative resistance change (R0 = R01-3, R04-6 at B = 0 T) B = ± 0.3 T4) B=±1T Temperature coefficient B=0T B = ± 0.3 T B=±1T TCR 1) Corresponding to diagram Ptot = f(Tcase) 2) Corresponding to diagram VIN = f(Tcase) 3) M R 01 – 2 – R 02 – 3 = -------------------------------× 100% for R01-2 > R02-3 R 01 – 2 4) 1 T = 1 Tesla = 104 Gauss Semiconductor Group 2 FP 412 D 250 Max. power dissipation versus temperature Ptot = f(T), T = Tcase, TA Maximum supply voltage versus temperature VIN = f(T), B = 0.2 T T = Tcase, TA Typical MR resistance versus temperature R1-3 = f(TA), B = Parameter Typical MR resistance versus magnetic induction B R1-3 = f(B), TA = 25 °C Semiconductor Group 3