m agnetic a ngle s ensor KMT32B preliminary 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 preliminary data sheet KMT32B www.datasheet.in
m agnetic a ngle s ensor KMT32B preliminary 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 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 c to +150 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 general description the KMT32B is a magnetic field sensor based on the anisotropic magnetoresistance effect. the sensor contains two p arallel supplied wheatstone bridges, which enclose a sensit ive angle of 45 degrees. a rotating magnetic field in the surface parallel t o the chip (x-y plane) will deliver two independent sinusoidal outp ut signals, one following a cos(2 ) and the second following a sin(2 ) function, being the angle between sensor and field direction (see figure 1). sm8 so8 tdfn die -15 -10 -5 0 5 10 15 0 45 90 135 180 225 270 315 360 [de g] uo/ucc [mv/v] bridge1 (sin) bridge2 (cos) KMT32B gnd1 gnd2 +vo2 +vo1 -vo1 -vo2 +vcc2 +vcc1 figure 1: characteristic curves for KMT32B www.datasheet.in
m agnetic a ngle s ensor KMT32B preliminary 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 the KMT32B magnetic field sensor is suited for high precision angle measurement applications under low field conditions (regularly h 0 = 25 ka/m, with reduced accuracy applicable down to h 0 = 8 ka/m; beware of earth?s magnetic field !). characteristic values (preliminary) p arameter s ymbol c ondition m in t yp m ax u nit a. operating limits max. supply voltage v cc,max 10 v max. current (single bridge) i cc,max 4 ma power dissipation p tot @t= tbd c tbd mw operating temperature t op -40 +150 c storage temperature t st -25 +150 c b. sensor specifications (t=25 c) supply voltage v cc 5 8.5 v resistance (single bridge) r b 2400 3000 3600 output signal range ? v/v cc condition a, b 17 20 mv/v offset voltage v off condition a, b -1 0 +1 mv/v angular inaccuracy ? condition a, b 0.05 0.2 deg angular hysteresis ? h condition a, b 0.1 deg c. sensor specifications tc of amplitude tcsv condition a, c -0.36 -0.32 -0.28 %/k tc of resistance tcbr condition a, c +0.27 +0.32 +0.37 %/k tc of offset tcvoff condition a, c -4 0 +4 v/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. circuit diagram www.datasheet.in
m agnetic a ngle s ensor KMT32B preliminary 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 measurement conditions p arameter s ymbol u nit c ondition a. set up conditions ambient temperature t c t = 23 5 c (unless otherwise noted) supply voltage v cc v vcc=5 v applied magnetic field h ka/m h=25 ka/m b. sensor specifications (t=25 c, 360 turn , h=25 ka/m , vo max >0, vo min <0) signal amplitude ? v/v mv/v ? v/v=vo max - vo min signal offset voff mv/v voff=vo max + vo min angular hysteresis ? h deg ? h = max| left turn - right turn | max. angular difference between left and right turn angular inaccuracy ? deg ?= max| 0 - | max. angular difference between actual value 0 and measured angle; offset voltage error contributions not included c. sensor specifications (t=-25c, +125c) ambient temperatures t c t 1 =-25 c, t 0 =+25 c, t 2 =+125 c tc of amplitude tcsv %/k % 100 ) ( ) ( ) ( ) ( 1 1 1 2 1 2 ? ? ? ? ? ? ? = t v v t v v t v v t t tcv tc of resistance tcbr %/k % 100 ) ( ) ( ) ( ) ( 1 1 1 2 1 2 ? ? ? ? = t r t r t r t t tcr tc of offset tcvoff v/(vk) ) ( ) ( ) ( 1 2 1 2 t t t voff t voff tcvoff ? ? = www.datasheet.in
m agnetic a ngle s ensor KMT32B preliminary 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 packages sm8 so8 www.datasheet.in
m agnetic a ngle s ensor KMT32B preliminary 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 tdfn8 die www.datasheet.in
m agnetic a ngle s ensor KMT32B preliminary 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 ordering code KMT32B so8 300130?? KMT32B sm8 30013030 KMT32B tdfn8 30013050 KMT32B chip 30013000 legal disclaimer this product is not designed for use in life suppor t appliances, devices or systems where malfunction of this product can reasonably be expected to result in personal injury . hl planartechnik gmbh customers using or selling this product for use in such applications do so at their own risk and agree to fully indemnify hl planartechnik gmbh for any d amages resulting from such improper use or sale. this data sheet contains target specifications for product development which my be subject to changes without notice. www.datasheet.in
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