SS109 unipolar hall switch packages features and benefits ? wide operating voltage range from 2.5v to 24v ? medium sensitivity ? cmos technology ? chopper-stabilized amplifier stage ? superior temperature stability ? insensitive to physical stress ? open drain output ? low current consumption ? small size-sot23 3l or sip 3l 3 pin sot23 (suffix so) 3 pin sip (suffix ua) both rohs compliant packages ? functional block diagram application examples ? automotive, consumer and industrial ? solid-state switch ? interrupter ? speed detection ? angular position detection ? linear position detection ? proximity detection ? general description the SS109 is a unipolar hall effect sensor ic fabricated from mixed signal cmos technology. the device integrates a voltage regulator, hall sensor with dynamic offset cancellation system, schmitt trigger and an open-drain output driver, all in a single package. it incorporates advanced chopper stabilization techniques to provide accurate and stable magnetic switch points. there are many applications for this hed ? hall electronic device - in addition to those listed above. thanks to its wide operating voltage range and extended c hoice of temperature range, it is quite suitable for use in automotive, industrial and consumer applications. the device is delivered in a small outline transistor (sot) or in a plastic single in line ( sip 3l flat). both 3-lead packages are rohs compliant. vdd voltage out r egulator choppe r 1 v2.10 may 1, 2012 ? ? ? hall p late gnd sip package sot package pin 1 ? v pin 1 ? v dd dd p in 2 ? gnd pin 2 ? out pin 3 ? out pin 3 ? gnd
SS109 unipolar hall switch glossary of terms millitesla (mt), gauss units of magnetic flux density: 1mt = 10 gauss rohs restriction of hazardous substances sot small outline transistor (sot package) - also referred with the package code ?so? esd electro-static discharge bldc brush-less direct-current operating point (b op ) magnetic flux density applied on the branded side of the package which turns the output driver on (v out = v dson ) release point (b rp ) magnetic flux density applied on the branded side of the package which turns the output driver off (v out = high) pin definitions and descriptions ? sot pin sip pin name type function 1 1 vdd supply supply voltage pin 2 3 out output open drain output pin 3 2 gnd ground ground pin table 1: pin definitions and descriptions absolute maximum ratings parameter symbol value units supply voltage v dd 28 v supply current i dd 50 ma output voltage v out 28 v output current i out 50 ma storage temperature range t s -50 to 150 c maximum junction temperature t j 165 c table 2: absolute maximum ratings operating temperature range symbol value units temperature suffix ?e? t a -40 to 85 c temperature suffix ?k? t a -40 to 125 c temperature suffix ?l? t a -40 to 150 c exceeding the absolute maximum ratings may cause permanent damage. exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 2 v2.10 may 1, 2012
SS109 unipolar hall switch 3 v2.10 may 1, 2012 general electrical specifications dc operating parameters t a = 25 , v dd = 2.5v to 24v (unless otherwise specified) parameter symbol test conditions min typ max units supply voltage v dd operating 2.2 24 v supply current i dd b < b rp 5 ma output saturation voltage v dson i out = 20ma, b > b op 0.5 v output leakage current i off b < b rp v out = 24v 1 10 a output rise time t r r l = 1k ? , c l = 20pf 0.25 s output fall time t f r l = 1k ? , c l = 20pf 0.25 s maximum switching frequency f sw --- 10 khz package thermal resistance r th single layer (1s) jedec board 301 c/w table 3: electrical specifications note : the output of SS109 will be switched after the supply voltage is over 2.2v, but the magnetic characteristics won't be normal until the supply is over 2.5v. magnetic specifications dc operating parameters v dd = 2.5v to 24v (unless otherwise specified) SS109 parameter symbol test conditions min typ max units operating point b op -150 -120 -90 g release point b rp -120 -80 -40 g hysteresis b hyst e spec., t a = 85c 30 40 50 g operating point b op -160 -120 -85 g release point b rp -130 -80 -35 g hysteresis b hyst k spec., t a = 125c 30 40 50 g operating point b op -170 -120 -80 g release point b rp -140 -80 -30 g hysteresis b hyst l spec., t a = 150c 30 40 50 g table 4: magnetic specifications output behavior versus magnetic pole dc operating parameters t a = -40 to 150 , v dd = 2.5v to 24v (unless otherwise specified) parameter test conditions out south pole (sot ) b > b op low north pole ( to) b > b op low null or weak magnetic field b = 0 or b < b rp high table5:output behavior versus magnetic pole
SS109 unipolar hall switch ? application information it is strongly recommended that an external bypass capac itor be connected (in close proximity to the hall sensor) between the supply (vdd pin) and ground (gnd pin) of the de vice to reduce both external noise and noise generated by the chopper stabilization technique. as is s hown in the two figures in next page, a 0.1 f capacitor is typical. for reverse voltage protection, it is r ecommended to connect a resistor or a di ode in series with the vdd pin. when using a resistor, three points are important: - the resistor has to limit the reverse current to 50ma maximum (v cc / r1 50ma) - the resulting device supply voltage v dd has to be higher than v dd min (v dd = v cc ? r1*i dd ) - the resistor has to withstand the power dissipated in reverse voltage condition (p d = v cc 2 /r1) when using a diode, a reverse current cannot flow and the voltage drop is almost constant ( 0.7v). therefore, a 100 ? /0.25w resistor for 5v application and a diode for higher supply voltage are recommended. both solutions provide the required reverse voltage protection. when a weak power supply is used or wh en the device is intended to be used in noisy environment, it is recommended that the figure 13.3 from the application information section is used. the low-pass filter formed by r1 and c1 and the zener diode z1 bypass the disturbances or voltage spikes occurring on the device supply voltage v dd . the diode d1 provides additional reverse voltage protection. a utomotive and s evere environment protection circuit typical three-wire application c ircuit 4 v2.10 may 1, 2012 ? esd precautions electronic semiconductor products are sensitive to electro static discharge (esd). always observe electro static discharge control pr ocedures whenever handling semiconductor products. SS109 r2 c2 vdd gnd out c1 SS109 r1:100 r2 c2 vdd c1 d1 out z1 gnd
SS109 unipolar hall switch ? package information package a, 3-pin sip: ? 5 v2.10 may 1, 2012
SS109 unipolar hall switch package at, 3-pin sot-23: ? ordering information part no. pb-free temperature code package code packing SS109esot yes -40c to 85c sot-23 7-in. reel, 3000 pieces/reel SS109eua yes -40c to 85c to-92 bulk, 1000 pieces/bag SS109ksot yes -40c to 125c sot-23 7-in. reel, 3000 pieces/reel SS109kua yes -40c to 125c to-92 bulk, 1000 pieces/bag SS109lsot yes -40c to 150c sot-23 7-in. reel, 3000 pieces/reel SS109lua yes -40c to 150c to-92 bulk, 1000 pieces/bag ? 6 v2.10 may 1, 2012
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