G-MRCO-021 TE Connectivity

KMT36H 360 Magnetic Angle Sensor SPECIFICATIONS AMR Sensor with 360 capability 3 TDFN outline 2.5x2.5x0.75 mm Three 120 phase-shifted signals Moderate field strength requirements The KMT36H is a magnetic field sensor utilizing the anisotropic magneto resistance effect. Therefore the sensor is sensing the magnetic field direction rather than the magnetic field strength. The sensor contains three Wheatstone bridges rotated by 120. A rotating magnetic field (typical strength 25 kA/m in the sensor plane) will result in three sinusoidal output signals with a period of 180, phase shifted by 60 field angle. By use of a modified atan algorithm the field angle can be calculated with high accuracy. As an unique feature, the KMT36H is able to measure full 360 by utilizing an additional magnetic field which is generated by a planar coil that is integrated on the chip. The 180/360 determination is done by a simple sign distinction and may be computed periodically or only once at power up. FEATURES Ideal for harsh environments due to magnetic sensing principle Contactless absolute angular measurement over 360 Accuracy better than +/- 0.5 Three bridge signals with 120 phase difference Tiny TDFN-housing 2.5 x 2.5 x 0.8 mm3 APPLICATIONS Absolute angle measurement Potentiometer replacement Motor motion control Camera positioning Robotics SENSOR SOLUTIONS /// KMT36H 360 Rev 5 6/2017 Page 1 KMT36H 360 Angular Sensor CHARACTERISTIC VALUES Parameter Condition Symbol Min Typ Max Unit Mechanical dimensions - TDFN Length X 2.5 mm Width Y 2.5 mm Height Z 0.75 mm Mechanical dimensions - SO8 4.9 Length X mm Width Y 6.0 mm Height Z 1.75 mm Operating limits Supply voltage V 5 12 V CC Coil current T = 25 C, H = 25 kA/m ICOIL 20 50 mA Operating temperature -40 +125 C -40 +125 Storage temperature C Parameter Condition Symbol Min Typ Max Unit Sensor specification 15 25 60 Applied magnetic field 2), 3) H kA/m Bridge resistance T = 25 C RB 2.4 3.0 3.6 k max. signal range T = 25 C, H = 25 kA/m 18 22 26 mV/V V/VCC -3 +3 Offset voltage 4) T = 25 C VOFF/VCC mV/V Hysteresis 1) (Repeatability) H = 25 kA/m Hyst 0.15 0.30 deg 0.15 0.30 Accuracy 1) H = 25 kA/m deg TC of amplitude H = 25 kA/m, 5) TCAMP -0.35 %/K +0.35 TC of bridge resistance 5) TCR %/K Coil resistance T = 25 C RCOIL 75 100 150 Thermal resistance (junction- T = 25C, 6) R 280 K/W amb thJ/A ambient) 1) Hysteresis and accuracy are depending nearly inversely proportional on the magnetic field strength. The accuracy is defined as the max. angular difference between actual field angle and measured angle calculated from the third and fifth harmonics of the Fourier spectrum. The hysteresis is defined as angular difference between left and right turn. 2) Generated with reference magnet 67.044 Magnetfabrik Bonn (25 kA/m 5.2 mm distance). 3) Minimum value depends on decreasing accuracy, upper limit on decreasing coil influence. Both are no absolute limits, but depend on the given application requirements. 4) Offset voltages measured as difference voltages V -V , V -V and V -V in relation to V . O1 O2 O2 O3 O3 O1 CC 5) Reference temperature Tref = -25 C, calculated from values at -25C and +125 C 6) TDFN soldered on standard test PCB, heat sink without solder connection SENSOR SOLUTIONS /// KMT36H 360 Rev 5 6/2017 Page 2