KMXP Linear Position Sensor

Transcription

1 Liear Positio Sesor SPECIFICATIONS AMR liear positio sesor DFN x6 package, very compact Small wall thickess for large air gaps High operatig temperature of 50 C O the edge solderig possible Movig a KMXP sesor alog a magetic scale will produce a sie ad a cosie output sigal as a fuctio of its positio. I order to deliver satisfyig results, this will be achieved as log as the air gap betwee sesor edge ad magetic scale surface does ot exceed approximately half of the pole pitch. As the sesor priciple is based o the aisotropic mageto resistace effect, the sigal amplitudes are early idepedet o the magetic field stregth ad therefore air gap variatios do ot have a strog effect o the accuracy. The sesor detects a magetic gradiet field ad is thus almost isesitive to homogeous stray fields. Precise displacemet values will be obtaied by usig a amplifier i combiatio with a microcotroller or commercial sie/cosie iterpolator device. The maximal obtaiable precisio depeds strogly o the accuracy of the magetic scale ad o the distace sesor magetic scale. Precisio values of <% of the pole pitch are commo. FEATURES Cotactless agular positio measuremet High accuracy Low cost, low power Failure detectio possible User has total cotrol over sigal evaluatio Exteded temperature rage REACH, 3TG & ROHS compliat APPLICATIONS Measuremet of liear displacemets, movemets, velocities i dirty eviromets Very precise agular measuremet o the circumferece usig pole wheels Torque measuremet i harsh eviromet SENSOR SOLUTIONS ///KMXP MR 06/07 Page

2 PERFORMANCE SPECS PARAMETER SYMBOL COND. TYPE MIN TYP MAX UNIT. Operatig Limits max. supply voltage Vcc,max all 0 V max. curret (both bridges) Icc,max KMXP 000 KMXP 000/5000 operatig temperature Top all C storage temperature Tst all C. Sesor Specificatios (T=5 C) Supply voltage Vcc all 5 V pole pitch ) Air gap package frot magetic scale ) Resistace (both bridges) p D Rb KMXP 000 KMXP 000 KMXP 5000 KMXP 000 KMXP 000 KMXP 5000 KMXP 000 KMXP 000/ Output sigal rage V/Vcc A, B all 8 6 mv/v Offset voltage V off A, B all mv/v 3. Sesor Specificatios TC of amplitude TCSV A, C All %/K TC of resistace TCBR A, C All %/K TC of offset TCVoff A, C all µv/v/k = ; (bridge umber); Stress above oe or more of the limitig values may cause permaet damage to the device. Exposure to limitig values for exteded periods may affect device reliability. ) Other pole pitches o request ) Typical values for covetioal magetic scales. Air gap for maximum accuracy depeds o the used scale. ma µm mm MEASUREMENT SET UP CONDITIONS PARAMETER SYMBOL UNIT CONDITION A. Set Up Coditios ambiet temperature T C T = 5 C (uless otherwise oted) supply voltage V cc V Vcc = 5 V applied magetic field H ka/m H > 0 ka/m B. Sesor Specificatios (T=5 C, 360 tur, H=5 ka/m, Vomax>0, Vomi<0) output sigal rage V / Vcc mv/v V / Vcc = (V max V mi) / Vcc sigal offset Voff mv/v Voff = (V max + V mi) / Vcc SENSOR SOLUTIONS /// KMXP Liear Positio Sesor 06/07 Page

3 C. Sesor Specificatios (T=-5 C, +5 C) ambiet temperatures T C T = -5 C, T0 = +5 C, T = +5 C TC of amplitude TCSV %/K TCV ( T TC of resistace TCBR %/K TCR ( T TC of offset TCVoff µv/(vk) = ; (bridge umber) TCVoff V Vcc T ) R T ) V ( T) Vcc V ( T) V cc Voff ( T) Voff ( T T ) ( T) 00% ( T) R( T) 00% R ( T ) ( T ) BLOCK DIAGRAM c. -V -V GND Vcc +V +V. c. Vcc -V -V GND Vcc +V +V. c. Figure a: KMXP 000/000 Figure b: KMXP 5000 TYPICAL PERFORMANCE CURVES Figure : typical output sigal voltage depedig o sesor positio SENSOR SOLUTIONS /// KMXP Liear Positio Sesor 06/07 Page 3

4 FUNCTION Figure 3: priciple fuctio of the sesor The KMXP sesors cosists of two mageto resistive Wheatstoe bridges, whose resistors are placed i a way that the characteristic magetic field distributio of a magetic scale with matchig pole pitch produces a sie ad a cosie sigal output, whe the sesor is moved alog the scale. I additio, some sesor types itegrate over more tha oe pole i order to improve sesor performace. EXAMPLE FOR A PRINTED CIRCUIT BOARD ASSEMBLY PIN ASSIGNMENT The pi assigmet is pi compatible for all KMXP types ad allows a commo PCB layout for all types: Pi KMXP5000 Vcc -V -V GND Vcc +V +V N/C N/C N/C N/C N/C KMXP000 N/C -V -V GND Vcc +V +V N/C N/C N/C N/C N/C KMXP000 N/C -V -V GND Vcc +V +V N/C N/C N/C N/C N/C SENSOR SOLUTIONS /// KMXP Liear Positio Sesor 06/07 Page 4

5 PHYSICAL DIMENSIONS Fig. 4: Physical dimesios of sesor package Reflow profile for this package accordig to IPC/JEDEC J-STD-00 Revisio D. (March 008). SENSOR SOLUTIONS /// KMXP Liear Positio Sesor 06/07 Page 5

6 APPLICATION EXAMPLE Fig. 5: Exemplary hardware cofiguratio for the usage with a covetioal microcotroller usig a Aalog Devices AD8605 amplifier for the preprocessig of the sesor sigals. SENSOR SOLUTIONS /// KMXP Liear Positio Sesor 06/07 Page 6

7 ORDERING CODE Name KMXP000 KMXP000 KMXP5000 Pole pitch mm mm 5 mm Article umber o request G-MRCO-050 G-MRCO-05 NORTH AMERICA Measuremet Specialties, Ic., a TE Coectivity Compay Phoe: customercare.hmpt@te.com EUROPE MEAS Deutschlad GmbH (Europe) a TE Coectivity Compay Phoe: customercare.dtmd@te.com ASIA Measuremet Specialties (Chia), Ltd., a TE Coectivity Compay Phoe: customercare.shz@te.com TE.com/sesorsolutios Measuremet Specialties, Ic., a TE Coectivity compay. Measuremet Specialties, TE Coectivity, TE Coectivity (logo) ad EVERY CONNECTION COUNTS are trademarks. All other logos, products ad/or compay ames referred to herei might be trademarks of their respective owers. The iformatio give herei, icludig drawigs, illustratios ad schematics which are iteded for illustratio purposes oly, is believed to be reliable. However, TE Coectivity makes o warraties as to its accuracy or completeess ad disclaims ay liability i coectio with its use. TE Coectivity s obligatios shall oly be as set forth i TE Coectivity s Stadard Terms ad Coditios of Sale for this product ad i o case will TE Coectivity be liable for ay icidetal, idirect or cosequetial damages arisig out of the sale, resale, use or misuse of the product. Users of TE Coectivity products should make their ow evaluatio to determie the suitability of each such product for the specific applicatio. 05 TE Coectivity Ltd. family of compaies All Rights Reserved. SENSOR SOLUTIONS /// KMXP Liear Positio Sesor 06/07 Page 7