datasheetv 1 .0a 1 / 6 tmr 401 x tmr gear tooth sensor with high sensitivity to magnetic field gradient general description the tmr40 1 x magnetic gear tooth sensors utilize a unique push - pull wheatstone bridge design, including one or two wheatstone full bridges, with four or eight unshielded high sensitivity tmr sensing elements. the wheatstone bridge creates a differential voltage output with respect to the magnetic field gradient along the sensors sen sitive direction. in the dual - bridge configuration, the two orthogonal wheatstone full bridges provide sine and cosine voltage signals that can be used to measure both the gear tooth position and the direction of motion. the tmr40 1 x magnetic gear tooth sen sors offer superior performance with high sensitivity to the magnetic field gradient. they can detect very small changes in magnetic field, along with good temperature stability of the output signal. the tmr40 1 x magnetic gear tooth sensors are available in 8 different standard spacings of 0. 4 mm, 0. 6 mm, 0. 8 mm, 1.0mm, 1.2 mm, 1.4 mm , 1.6 mm and 1.8 mm . t hree types of small form factor lga packages are available. the package dimensions are 3mm 3mm 0.9mm , 3mm 6 mm 0.9mm . features and benefits ? t unneling magnetoresistance (tmr) technology ? high saturation point allowing operation under large dc magnetic field ? wide air - gap tolerance ? high sensitivity to magnetic field gradient ? capable of small - pitch gear tooth detection ? dc(zero - speed) operation ? sine/cosine signal outputs with precise phase shift ? excellent thermal stability ? good immunity to environmental magnetic field ? compact ultra - thin package applications ? gear tooth motion, speed, and direction sensing ? l inear and rotary speed sensing ? linear and rotary position sensing ? linear magnetic scales ? magnetic encoders tmr 400x
datasheetv 1 .0a 2 / 6 wheatstone bridge connection dual - bridge configuration pin configuration direction of sensitivity dual - bridge lga6l (3x3) bottom view top view tmr40 11 tmr4012 tmr40 13 direction of sensitivity dual - bridge lga6l (3x 6 ) lga6l (3x6) bottom view top view view) tmr40 14 ~ tmr40 1 8
datasheetv 1 .0a 3 / 6 pin no. pin name pin function 1 v1 - differential output ( - ) of bridge 1 2 v2 - * differential output ( - ) of bridge 2 * 3 gnd ground 4 v2+ * differential output (+) of bridge 2 * 5 v1+ differential output ( - ) of bridge 1 6 v cc supply voltage absolutemaximum ratings parameter symbol limit unit supply voltage v cc 7 v reverse supply voltage v rcc 7 v magnetic field h 1500 oe (1) esd voltage v esd 4000 v operating temperature t a - 40 ~ 125 c storage temperature t stg - 5 0 ~1 50 c specification ( v cc =1.0v , t a =25c , differential output ) parameter symbol conditions min typ max unit supply voltage v cc operating 1 7 v supply current i cc output open 67 (2) a bridge resistance r 15 (3) kohm single resistor sensitivity sen - 0.46 %r/oe saturation field h sat 70 (4) oe linear range 1 lin1 linearity 98% 20 oe linear range 2 lin2 linearity 95% 40 oe offset voltage v offset - 20 20 mv/v hysteresis hys fit @20 oe 1 %fs maximum differential voltage output vout max 650 mv/v temperature coefficient of resistance tcr h = 0 oe - 985 ppm/c temperature coefficient of sensitivity tcs - 1800 ppm/c note: (1) 1 oe (oersted) = 1 gauss in air = 0.1 millitesla = 79.8 a/m. (2) supply current is determined by the resistance of the sensor . ( 3 ) custom sensor resistance may be available upon request. (4) the sensors may saturate if the magnetic field exceeds this range. saturation field can be custom designed to meet special re quirements.
datasheetv 1 .0a 4 / 6 tmr element layout part number single/ dual bridge tmr element spacing (mm) (tmr elements are placed symmetrially with respect to the center of the package, which is marked by the + symbol.) approx. gear tooth pitch range packa g e format tmr40 1 1 dua l optimal pitch at 0. 8 mm lga6l (3x3) tmr40 1 2 dua l optimal pitch at 1. 2 mm lga6l (3x3) tmr40 1 3 dua l optimal pitch at 1. 6 mm lga6l (3x3) tmr40 1 4 dua l optimal pitch at 2 .0mm lga6l (3x 6 ) tmr40 1 5 dual optimal pitch at 2. 4 mm lga6l (3x 6 ) tmr40 1 6 dual optimal pitch at 2.8 mm lga6l (3x6) tmr40 1 7 dual optimal pitch at 3.2 mm lga6l (3x6) tmr40 1 8 dual optimal pitch at 3.6 mm lga6l (3x6)
datasheetv 1 .0a 5 / 6 package information lga6l (3x3) package drawing: unit: mm lga6l (3x6) package drawing: unit: mm
datasheetv 1 .0a 6 / 6 tmr sensor position lga6l (3x3) lga6l (3x6) top view and side view(unit: mm) multidimension technology co., ltd. address: no.7 guangdong road, zhangjiagang free trade zone, jiangsu, 215634, china web: www.dowaytech.com/en email: info@dowaytech.com the information provided herein by multidimension technology co., ltd.(hereinafter multidimension) is believed to be accurate and reliable. publication neither conveys nor implies any license under patent or other industrial or intellectual property rights. multidimensionreserves the right to make changes to product specifications for the purpose of improving product quality, reliability, and functionality. multidimensiondoe s not assume any liability arising out of the application and use of its products. multidimensions customers using or selling this product for use in appliances, devices, or systems where malfunction can reasonably be expected to result in personal injury do so at their own risk and agree to fully indemnify multidimensionfor any damages resulting from such applications.
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