KMT32B

MAGNETIC ANGLE SENSOR KMT32B Preliminary Preliminary Data Sheet KMT32B HL PLANARTECHNIK GmbH • Hauert 13 • 44227 Dortmund • Germany • www.hlplanar.de service@hlplanar.de • phone: +49-(0)231-97400 • fax: +49-(0)231-974020 KMT32B_PreliminaryDataSheet (2007-01-12)-1.doc Last update 19.01.07 MAGNETIC ANGLE SENSOR KMT32B Preliminary FEATURES • • • • • • • • • • Contactless angular position Ideal for harsh environments due to magnetic sensing Factory optimized linearity Low Cost High Accuracy High rotational speed up to 30,000 rpm Extended operating temperature range (-40 ° to +150 ° C C) Low Power RoHS compliant (lead free) SMD package APPLICATIONS • • • • • • • Absolute and incremental angle Angle Measurement Motor motion control Robotics Camera positioning Potentiometer replacement Automotive PACKAGES SM8 SO8 TDFN Die General Description The KMT32B is a magnetic field sensor based on the anisotropic magnetoresistance effect. The sensor contains two parallel supplied Wheatstone bridges, which enclose a sensitive angle of 45 degrees. A rotating magnetic field in the surface parallel to the chip (x-y plane) will deliver two independent sinusoidal output signals, one following a cos(2α) and the second following a sin(2α) function, α being the angle between sensor and field direction (see Figure 1). 15 10 5 Uo/Ucc [mV/V] KMT32B 0 0 -5 45 90 135 180 225 270 315 360 -Vo1 -Vo2 +Vcc2 GND1 GND2 +Vo2 +Vo1 -10 +Vcc1 - 15 α [ de g] bridge1 (sin) bridge2 (cos) Figure 1: Characteristic curves for KMT32B HL PLANARTECHNIK GmbH • Hauert 13 • 44227 Dortmund • Germany • www.hlplanar.de service@hlplanar.de • phone: +49-(0)231-97400 • fax: +49-(0)231-974020 KMT32B_PreliminaryDataSheet (2007-01-12)-1.doc Last update 19.01.07 MAGNETIC ANGLE SENSOR KMT32B Preliminary The KMT32B magnetic field sensor is suited for high precision angle measurement applications under low field conditions (regularly H0 = 25 kA/m, with reduced accuracy applicable down to H0 = 8 kA/m; beware of earth’s magnetic field !). Circuit Diagram CHARACTERISTIC VALUES (PRELIMINARY) PARAMETER SYMBOL CONDITION MIN TYP M AX UNIT A. Operating Limits max. supply voltage Vcc,max 10 4 @T= TBD ° C -40 -25 TBD +150 +150 V mA mW °C °C max. current (single bridge) Icc,max power dissipation operating temperature storage temperature Ptot Top Tst B. Sensor Specifications (T=25 ° C) Supply voltage Resistance (single bridge) Output signal range Offset voltage angular inaccuracy angular hysteresis Vcc Rb 2400 Condition A, B Condition A, B Condition A, B Condition A, B 17 -1 5 3000 20 0 0.05 +1 0.2 0.1 8.5 3600 V Ω mV/V mV/V deg deg ∆V/Vcc Voff ∆α ∆αH C. Sensor Specifications TC of amplitude TC of resistance TC of offset TCSV TCBR TCVoff Condition A, C Condition A, C Condition A, C -0.36 +0.27 -4 -0.32 +0.32 0 -0.28 +0.37 +4 %/K %/K µV/V/K Stress above one or more of the limiting values may cause permanent damage to the device. Exposure to limiting values for extended periods may affect device reliability. HL PLANARTECHNIK GmbH • Hauert 13 • 44227 Dortmund • Germany • www.hlplanar.de service@hlplanar.de • phone: +49-(0)231-97400 • fax: +49-(0)231-974020 KMT32B_PreliminaryDataSheet (2007-01-12)-1.doc Last update 19.01.07 MAGNETIC ANGLE SENSOR KMT32B Preliminary MEASUREMENT CONDITIONS PARAMETER SYMBOL UNIT CONDITION A. Set Up Conditions ambient temperature supply voltage applied magnetic field T Vcc H ° C V kA/m T = 23±5 ° (unless otherwise noted) C Vcc=5 V H=25 kA/m B. Sensor Specifications (T=25 ° 360° turn , H=25 kA/m , Vomax>0, Vomin