ss159 unipolar hall switc h-low sensitivity packages features and benefits ? 3.5v to 24v operation ? -40 to 150 superior temperature operation ? cmos technology ? low current consumption ? chopper-stabilized amplifier stage ? open drain output ? low sensitivity ? 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 ? brushless dc motor commutation ? speed detection ? angular position detection ? proximity detection ? current detector ? general description the ss159 is a unipolar hall-effect sensor ic fabricated from cmos technology. the de vice integrates a voltage regulator, hall sensor with dynamic offset cancellation system, small signal amplifier, schmitt trigger and an open-drain output driver. with suitable output pull up, they can be used with bipolar or cmos logic circuits. these hall-effect switches are monolithic integrated circuits with tighter magnetic specifications, designed to operate continuously over extended temperatures to +150 , and are more stable with both temperature and supply voltage changes. the unipolar switching characteristic makes these de vices ideal for use with a simple bar or rod magnet. 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) and in a plastic single in line ( sip 3l flat). both 3-lead packages are rohs compliant. vdd out voltage regulator choppe r hall plate gnd sip package sot package pin 1 ? v dd pin 1 ? v dd pin 2 ? gnd pin 2 ? out pin 3 ? out pin 3 ? gnd ? 1 v2.10 may 1, 2012
ss159 unipolar hall switc h-low sensitivity glossary of terms millitesla (mt), gauss units of magnetic flux density: 1mt = 10 gauss rohs restriction of hazardous substances 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 -65 to 170 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
ss159 unipolar hall switc h-low sensitivity general electrical specifications dc operating parameters t a = 25 , v dd = 3.5v to 24v (unless otherwise specified) parameter symbol test conditions min typ max units supply voltage v dd operating 3.5 24 v supply current i dd b < b rp 1.5 2.5 5 ma output saturation voltage v dson i out = 20ma, b > b op 0.4 0.5 v output leakage current i off b < b rp v out = 24v 0.01 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 table 3: electrical specifications magnetic specifications dc operating parameters v dd = 3.5v to 24v (unless otherwise specified) ss159 parameter symbol test conditions min typ max units operating point b op 100 125 150 g release point b rp 60 85 110 g hysteresis b hyst ta=25 ,v dd =12v dc 40 g table 4: magnetic specifications application information typical three-wire application circuit automotive and harsh, noisy environments three-wire circuit 3 v2.10 may 1, 2012
ss159 unipolar hall switc h-low sensitivity application comments for proper operation, a 100nf bypass capacitor should be placed as close as possible to the device between the v dd and ground pin. for reverse voltage protection, it is recommended to c onnect a resistor or a diode in series with the v dd 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 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. esd precautions electronic semiconductor products are sensitive to electro static discharge (esd). always observe electro static discharge control pr ocedures whenever handling semiconductor products. package information package lh, 3-pin sot-23: 4 v2.10 may 1, 2012
ss159 unipolar hall switc h-low sensitivity package ua, 3-pin sip: ordering information part no. pb-free temperature code package code packing ss159esot yes -40c to 85c sot-23 7-in. reel, 3000 pieces/reel ss159eua yes -40c to 85c to-92 bulk, 1000 pieces/bag SS159KSOT yes -40c to 125c sot-23 7-in. reel, 3000 pieces/reel ss159kua yes -40c to 125c to-92 bulk, 1000 pieces/bag ss159lsot yes -40c to 150c sot-23 7-in. reel, 3000 pieces/reel ss159lua yes -40c to 150c to-92 bulk, 1000 pieces/bag ? 5 v2.10 may 1, 2012
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