ah172 internal pull-up hall effect latch this datasheet contains new product information. anachip corp. reserves the rights to modify the product specification without notice. no liability is assumed as a result of the use of this product. no rights under any patent accompany the sale of the product. rev. 1.0 oct 6, 2005 1/6 ? features - bipolar hall effect latch sensor - 3.0v to 20v dc operation voltage - built-in pull-up resistor - 25ma output sink current - operating temperature: -20 c to 85 c - package: sip3, sot23 ? applications - rotor position sensing - current switch - encoder - rpm detection ? pin assignments (sip3 package) ( sot23 package) 1. vcc 2. gnd 3. out 1. vcc 3. gnd 2. (top view) out ? general description ah172 is a single digital output hall-effect sensor with pull-up resistor for high temperature operation. the device includes an on-chip hall voltage generator for magnetic sensing, an amplifier to amplify hall voltage, and a comparator to provide switching hysteresis for noise rejection, and an output driver with a pull-up resistor (rpu). an internal bandgap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range. while the magnetic flux density (b) is larger than operate point (bop), the out pin turns on (low). if b removed toward release point (brp), the out pin is latched ?on? state prior to b < brp. when b < brp, the out pin go into ? off ? state. ? pin descriptions name description vcc positive power supply gnd ground out output stage ? ordering information ah172 x - x x x - x packing blank : bulk a : tape & reel p: sip3 w: sot23 package lead l : lead free wafer body magnetic characteristics blank or a~z : if necessary to specify a or b (for sot23 only)
ah172 internal pull-up hall effect latch anachip corp. www.anachip.com.tw rev 1.0 oct 6, 2005 2/6 ? block diagram amp reg. r pu 1 3 2 vcc out gnd ? functional application circuit m driver & control logic i a i b i c i a i c i b h b h a h c m: three phase hall motor digital hall effect sensor hall motor driver rpm sensing 3 phase hall motor
ah172 internal pull-up hall effect latch anachip corp. www.anachip.com.tw rev 1.0 oct 6, 2005 3/6 ? absolute maxi mum ratings ( at ta= 25 c ) characteristics symbol values unit supply voltage vcc 20 v output ?off ? voltage vout (off) 20 v output ?on? current io (sink) 25 ma operating temperature range top -20~+85 c storage temperature range tstg -65~+150 c maximum junction temperature tj +150 c sip 550 mw power dissipation sot23 pd 230 mw ? electrical characteristics ( ta= 25 c ) characteristics symbol conditions min. typ. max. unit supply voltage vcc 3 - 20 v output saturation voltage vout(sat) vcc=12v, out ?on? io =10ma - 300 400 mv supply current icc vcc=12v, out ?off? - 3.5 6 ma internal pull-up resistor rpu 7 10 13 k ? dropout voltage vd vd = vcc-vce - - 0.3 v ? magnetic characteristics (at ta= 25 c ) (1mt = 10 gauss) a grade characteristics symbol min. typ. max. unit operate point bop 15 - 60 gauss release point brp -60 - -15 gauss hysteresis bhy - 80 - gauss b grade characteristics symbol min. typ. max. unit operate point bop 5 - 80 gauss release point brp -80 - -5 gauss hysteresis bhy - 80 - gauss ? operating characteristics marking side s n b hy v sat v cc ( output voltage ) v d b rp b op 0 ( magnetic flux density ) v out high low marking side s n ( sip3 ) ( sot23 )
ah172 internal pull-up hall effect latch anachip corp. www.anachip.com.tw rev 1.0 oct 6, 2005 4/6 ? performance characteristics (sip3) ta ( c) 25 50 60 70 80 85 90 95 100 pd (mw) 550 440 396 352 308 286 264 242 220 ta ( c) 105 110 115 120 125 130 135 140 150 pd (mw) 198 176 154 132 110 88 66 44 0 power dissipation curve 0 100 200 300 400 500 600 0 25 50 75 100 125 150 ta ( c) pd (mw ) 85 ? performance characteristics (sot23-3) ta ( c) 25 50 60 70 80 85 90 100 110 120 125 130 140 150 pd (mw) 230 184 166 147 129 120 110 92 74 55 46 37 18 0 power dissipation curve 0 100 200 300 0 25 50 75 100 125 150 ta ( c) pd (mw) 85 ? marking information (1) sot23 (2) sip3 j2 : ah172 xx ym x date code y : year m :month (a~l) (top view) id code a~z: non-lead free a~z : lead free 172 yww x date code y : year ww : nth week (top view) id code a~z: non-lead free a~z : lead free
ah172 internal pull-up hall effect latch anachip corp. www.anachip.com.tw rev 1.0 oct 6, 2005 5/6 ? package information (1) package type: sip-3l active area depth sensor location 123 2.10mm 1.55mm 0.51mm nom branded surface 1.57mm 1.47mm 4.17mm 4.04mm 1.82 mm 15.50mm 13.00mm 1 2 3 1.27mm 0.41mm 0.41mm 45 o 45 o 0.38mm 0.7mm 3.10mm 2.97mm package dimension
ah172 internal pull-up hall effect latch anachip corp. www.anachip.com.tw rev 1.0 oct 6, 2005 6/6 (2) package type: sot23-3l e e he d a2 a1 b(3x) a 2(4x) e1 2 1 3 1.45mm 0.8mm ( sensing point ) 1(4x) l view c l1 gauge plane c see view c m dimensions in millimeters dimensions in inches symbol min. nom. max. min. nom. max. a 1.05 - 1.35 0.041 - 0.053 a1 0.05 - 0.15 0.002 - 0.006 a2 1.00 1.10 1.20 0.039 0.043 0.047 b 0.25 - 0.50 0.010 - 0.020 c 0.08 - 0.20 0.003 - 0.008 d 2.70 2.90 3.00 0.106 0.114 0.118 e 1.50 1.60 1.70 0.059 0.063 0.067 he 2.60 2.80 3.00 0.102 0.110 0.118 l 0.30 - 0.60 0.012 - 0.024 l1 0.50 0.60 0.70 0.020 0.024 0.028 m 0.73 0.78 0.83 0.029 0.031 0.033 e 1.80 1.90 2.00 0.071 0.075 0.079 e1 0.85 0.95 1.05 0.033 0.037 0.041 0 o 5 o 10 o 0 o 5 o 10 o 1 3 o 5 o 7 o 3 o 5 o 7 o 2 6 o 8 o 10 o 6 o 8 o 10 o
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