SS259 cmos omnipolar high sensitivity micropower hall switch packages features and benefits ? operation down to 2.5v ? micropower consumption for battery powered applications ? high sensitivity for direct reed switch replacement applications ? omnipolar, output switches with absolute value of north or south pole from magnet 3 pin sot23 (suffix so) 3 pin sip (suffix ua) ? functional block diagram application examples ? solid-state switch ? handheld wireless handset awake switch ? lid close sensor for battery powered devices ? magnet proximity sensor for reed switch replacement in low duty cycle applications ? general description: the SS259 omnipolar hall effect sensor ic is fabricated from mixed signal cmos technology. it incorporates advanced chopper-stabilization techniques to provide accurate and stable magnetic switch points. the circuit design provides an internally controlled cl ocking mechanism to cycle power to the hall element and analog signal processing circuits. this serves to place the high current-consuming portions of the circuit into a ?sleep? mode. periodically the device is ?awakened? by this internal logic and the magnetic flux from the hall element is evaluated against the predefined thresholds. if the flux density is above or below the b op /b rp thresholds then the output transistor is driven to change states accordingly. while in th e ?sleep? cycle the output transistor is latched in its previous state. the design has been optimized for service in applications requiring extended operating lifetime in battery powered systems. the output transistor of the SS259 will be latched on (b op ) in the presence of a sufficiently strong south or north magnetic field facing the marked side of the package. the output will be latched off (b rp ) in the absence of a magnetic field. ? 1 v2.10 may 1, 2012
SS259 cmos omnipolar high sensitivity micropower hall switch typical application circuit sec's pole-independent sensing technique allows for operation with either a north pole or south pole magnet orientation, enhancing the manufacturability of the device. the state-of-the-art technology provides the same output polarity for either pole face. it is strongly recommended that an external bypass be connected (in close proximity to the hall sensor) between the supply and ground of the device to reduce both external noise and noise generated by the chopper-stabilization technique. this is especially true due to the relatively high impedance of battery supplies. internal timing circuit ? current perio d i aw sam ut ple & outp latched i av i sp awake taw: 175 s sleep tsl: 70ms 0 time ? 2 v2.10 may 1, 2012
SS259 cmos omnipolar high sensitivity micropower hall switch 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 (operating) v dd 6 v supply current i dd 5 ma output voltage v out 6 v output current i out 5 ma operating temperature range t a -40 to 85 c storage temperature range t s -50 to 150 c esd sensitivity - 4000 v table 2: absolute maximum ratings exceeding the absolute maximum ratings may cause permanent damage. exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. dc electrical characteristics dc operating parameters: t a = 25 , v dd = 2.75v. parameter symbol test conditions min typ max units operating voltage v dd operating 2.5 3 5.5 v supply current i dd average 5 a output current i out 1.0 ma saturation voltage v sat i out = 1ma 0.4 v awake mode time t aw operating 175 s sleep mode time t sl operating 70 ms table 3: dc electrical characteristics 3 v2.10 may 1, 2012
SS259 cmos omnipolar high sensitivity micropower hall switch magnetic characteristics operating parameters: t a = 25c, v dd = 2.75v dc SS259 parameter symbol min type max units operating point b op - +/-35 +/-60 gs release point b rp +/-5 +/-21 - gs hysteresis b hyst - 14 - gs table 4: magnetic specifications output voltage (v) 3.0 off b opn b rps b ops b rpn on 2.5 0.5 1.0 1.5 2.0 0 -20 -80 -60 -40 0 20 40 60 80 magnetic flux (gauss) esd protection human body model (hbm) tests according to: mil. std. 883f method 3015.7 limit values parameter symbol min max unit notes esd voltage v esd ?4 kv ? 4 v2.10 may 1, 2012
SS259 cmos omnipolar high sensitivity micropower hall switch performance characteristics ? 5 v2.10 may 1, 2012
SS259 cmos omnipolar high sensitivity micropower hall switch unique features cmos hall ic technology the chopper stabilized amplifier uses switched capacitor tech niques to eliminate the amplifier offset voltage, which, in bipolar devices, is a major source of temperature sensit ive drift. cmos makes this advanced technique possible. the cmos chip is also much smaller than a bipolar chip, allowing very sophisticated circuitry to be placed in less space. the small chip size also contributes to lower physical stress and less power consumption. installation comments consider temperature coefficients of hall ic and magneti c, as well as air gap and life time variations. observe temperature limits during wave solderi ng. typical ir sold er-reflow profile: ? no rapid heating and cooling. ? recommended preheating for max. 2minutes at 150c ? recommended reflowing for max. 5seconds at 240c ? esd precautions electronic semiconductor products are sensitive to electro static discharge (esd). always observe electro static discharge control pr ocedures whenever handling semiconductor products. ? 6 v2.10 may 1, 2012
SS259 cmos omnipolar high sensitivity micropower hall switch package ua, 3-pin sip: ? 7 v2.10 may 1, 2012
SS259 cmos omnipolar high sensitivity micropower hall switch package sot, 3-pin sot-23: sot-23 package hall location: ordering information part no. pb-free temperature code package code packing SS259esot yes -40c to 85c sot-23 7-in. reel, 3000 pieces/reel SS259eua yes -40c to 85c to-92 bulk, 1000 pieces/bag SS259ksot yes -40c to125c sot-23 7-in. reel, 3000 pieces/reel SS259kua yes -40c to 125c to-92 bulk, 1000 pieces/bag SS259lsot yes -40c to 150c sot-23 7-in. reel, 3000 pieces/reel SS259lua yes -40c to 150c to-92 bulk, 1000 pieces/bag ? 8 v2.10 may 1, 2012
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