KMXP Linear Position Sensor SPECIFICATIONS AMR linear position sensor DFN 2x6 package, very compact Small wall thickness for large air gaps High operating temperature of 150C On the edge soldering possible Moving a KMXP sensor along a magnetic scale will produce a sine and a cosine output signal as a function of its position. In order to deliver satisfying results, this will be achieved as long as the air gap between sensor edge and magnetic scale surface does not exceed approximately half of the pole pitch. As the sensor principle is based on the anisotropic magneto resistance effect, the signal amplitudes are nearly independent on the magnetic field strength and therefore air gap variations do not have a strong effect on the accuracy. The sensor detects a magnetic gradient field and is thus almost insensitive to homogenous stray fields. Precise displacement values will be obtained by using an amplifier in combination with a microcontroller or commercial sine/cosine interpolator device. The maximal obtainable precision depends strongly on the accuracy of the magnetic scale and on the distance sensor magnetic scale. Precision values of <1% of the pole pitch are common. FEATURES APPLICATIONS Contactless angular position Measurement of linear measurement displacements, movements, High accuracy velocities in dirty environments Low cost, low power Very precise angular measurement Failure detection possible on the circumference using pole User has total control over signal wheels evaluation Torque measurement in harsh Extended temperature range environment REACH, 3TG & ROHS compliant SENSOR SOLUTIONS ///KMXP MR 06/2017 Page 1 KMXP LINEAR POSITION SENSOR PERFORMANCE SPECS PARAMETER SYMBOL COND. TYPE MIN TYP MAX UNIT 1. Operating Limits max. supply voltage V all 10 V cc,max max. current (both 5 KMXP 1000 I mA cc,max bridges) KMXP 2000/5000 10 operating temperature T all -40 +150 op C storage temperature T all -40 +125 C st 2. Sensor Specifications (T=25 C) Supply voltage V all 5 V cc 1000 KMXP 1000 KMXP 2000 pole pitch 1) p 2000 m KMXP 5000 5000 0.1 0.4 0.8 KMXP 1000 Air gap package front KMXP 2000 D 0.2 0.8 1.8 mm magnetic scale 2) KMXP 5000 0.5 2 4 2000 3000 4000 Resistance KMXP 1000 R b (both bridges) KMXP 2000/5000 1000 1500 2000 Output signal range V /V A, B all 18 22 26 mV/V n cc all -1 0 +1 Offset voltage Vn off A, B mV/V 3. Sensor Specifications TC of amplitude TCSV A, C All -0.35 %/K TC of resistance TCBR A, C All +0.35 %/K TC of offset TCVoff A, C all -4 0 +4 V/V/K n = 1 2 (bridge number) 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. 1) Other pole pitches on request 2) Typical values for conventional magnetic scales. Air gap for maximum accuracy depends on the used scale. MEASUREMENT SET UP CONDITIONS PARAMETER SYMBOL UNIT CONDITION A. Set Up Conditions ambient temperature T = 25 C (unless otherwise noted) T C supply voltage V Vcc = 5 V cc V applied magnetic field H > 10 kA/m H kA/m B. Sensor Specifications (T=25 C, 360 turn , H=25 kA/m , Vomax>0, Vomin<0) output signal range V / V = (V V ) / V V / V mV/V n cc n max n min cc n cc signal offset V = (V + V ) / V V mV/V off n n max n min cc off n SENSOR SOLUTIONS /// KMXP Linear Position Sensor 06/2017 Page 2