Double Differential Magneto Resistor FP 420 L 90 Dimensions in mm Features Typical applications • • • • • • • • • • • Double differential magneto resistor on one carrier Accurate intercenter spacing High operating temperature range High output voltage Compact construction Available in strip form for automatic assembly Optimized intercenter spacing on modules m = 0.3 mm • Reduced temperature dependence of offset voltage Semiconductor Group 1 Incremental angular encoders Detection of sense of rotation Detection of speed Detection of position 07.96 FP 420 L 90 Type Ordering Code FP 420 L 90 Q65420-L90 (singular) FP 420 L 90 Q65420-L0090E001 (taped) 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 silicon substrate. Contact to the magneto resistors is achieved using a copper/polyimide carrier film known as TAB. The basic resistance of each of the magneto resistors is 90 Ω. The two series coupled pairs of magneto resistors are actuated by an external magnetic field or can be biased by a permanent magnet and actuated by a soft iron target. Semiconductor Group 2 FP 420 L 90 Maximum ratings Parameter Symbol Value Unit Operating temperature – 40 / + 175 °C – 40 / + 185 °C 800 mW Supply voltage (B = 0.2 T, TA = 25 °C) TA Tstg Ptot VIN 8 V Thermal conductivity –attached to heatsink –in still air Gthcase GthA 20 1.5 mW/K mW/K Nominal supply voltage (B = 0.2 T)2) VINN 5 V Basic resistance (I < 1 mA, B = 0 T) R01-3 160…280 Ω Center symmetry3) M RB/R0 ≤3 % Storage temperature Power dissipation1) 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 1) 2) 3) > 1.7 >7 TCR – 0.16 – 0.38 – 0.54 T = Tcase T = Tcase, T < 80 °C M R 01 – 2 – R 02 – 3 = ------------------------------- × 100% for R01-2 > R02-3 M = -------------------------------- × 100% for R04-5 > R05-6 R 01 – 2 R 04 – 5 – R 05 – 6 R 04 – 5 4) 1 T = 1 Tesla = 104 Gauss Semiconductor Group – 3 %/K %/K %/K FP 420 L 90 Max. power dissipation versus temperature Ptot = f(T), T = Tcase, TA Maximum supply voltage versus temperature VIN = f(T), B = 0.2 T Typical MR resistance versus temperature R01-3, 4-6 = f(TA), B = Parameter Typical MR resistance versus magnetic induction B R01-3, 4-6 = f(B), TA = 25 °C Semiconductor Group 4