Allegro 3185 THRU 3189 Manual
Contents
1. Exact body and lead configuration at vendor s option within limits shown 2 Supplied in bulk pack 500 pieces per bag or add TR to part number for tape and reel 3 Only low temperature lt 240 C reflow soldering techniques are recommended for SOT89 devices www allegromicro com 3185 THRU 3189 HALL EFFECT LATCHES FOR HIGH TEMPERATURE OPERATION PACKAGE DESIGNATOR UA Dimensions in Inches Dimensions in Millimeters controlling dimensions for reference only 0 164 4 17 0 159 4 04 SEE NOTE f SEE NOTE 1 27 gt BSC a Dwg MH 014E mm Dwg MH 014E in Radial Lead Form order A318xxUA LC NOTES 1 Tolerances on package height and width represent allowable mold offsets Dimensions given are measured at the widest point parting line 2 Exact body and lead configuration at vendor s option within limits shown 3 Height does not include mold gate flash 4 Recommended minimum PWB hole diameter to clear transition area is 0 035 0 89 mm 5 Where no tolerance is specified dimension is nominal 6 Supplied in bulk pack 500 pieces per bag gt 0 100 lt 2 5 mm Dwg MH 026 NOTE Lead form dimensions are the nominals produced on the forming equipment No dimensional tolerance is implied or guaranteed for bulk packaging 500 pieces per bag 115 Northeast Cutoff Box 15036 Worcester Massachusetts 01615 0036 508 853 5000 3185 THRU 3189 HALL EFFECT LATCHES FOR HIG2. 3185 THRU 3189 Gz 60922 ye0ys eq HALL EFFECT LATCHES FOR HIGH TEMPERATURE OPERATION These Hall effect latches are extremely temperature stable and stress resistant sensors especially suited for operation over extended temperature ranges to 150 C Superior high temperature performance is made possible through a novel Schmitt trigger circuit that maintains operate and release point symmetry by compensating for temperature changes in the Hall ele ment Additionally internal compensation provides magnetic switch points that become more sensitive with temperature hence offsetting the usual degradation of the magnetic field with temperature The symmetry capability makes these devices ideal for use in pulse counting applications where duty cycle is an important parameter The four basic devices 3185 3187 3188 and 3189 are identical except for magnetic switch points Each device includes on a single silicon chip a voltage regulator qua dratic Hall voltage generator temperature compensation circuit signal 3 amplifier Schmitt trigger and a buffered open collector output to sink up to 25 mA The on board regulator permits operation with supply voltages of 3 8 to 24 volts H gt A z O The first character of the part number suffix determines the device operating temperature range Suffix E is for 40 C to 85 C and suffix L is for 40 C to 150 C Three package styles provide a magnetically optim
3. H TEMPERATURE www allegromicro com OPERATION The products described herein are manufactured under one or more of the following U S patents 5 045 920 5 264 783 5 442 283 5 389 889 5 581 179 5 517 112 5 619 137 5 621 319 5 650 719 5 686 894 5 694 038 5 729 130 5 917 320 and other patents pending Allegro MicroSystems Inc reserves the right to make from time to time such departures from the detail specifications as may be required to permit improvements in the performance reliability or manufacturability of its products Before placing an order the user is cautioned to verify that the information being relied upon is current Allegro products are not authorized for use as critical components in life support appliances devices or systems without express written approval The information included herein is believed to be accurate and reliable How ever Allegro MicroSystems Inc assumes no responsibility for its use nor for any infringements of patents or other rights of third parties that may result from its use 3185 THRU 3189 HALL EFFECT LATCHES FOR HIGH TEMPERATURE OPERATION HALL EF FECT SENSORS Partial Operate Release Hysteresis Replaces Part Point G Point G G Oper and Number Over Oper Voltage amp Temp Range Temp Packages Comments UGN3175 15 to 180 180 to 15 gt 80 Typ 180 S LT UA UGN3177 25 to 150 150 to 25 gt 50 Typ 180 S LT UA A3185x 140 to 300 300 to 140 280 t
4. hree l l a sigma for a particular design product improve The simplest form of magnet that will operate these devices is a ring 9 ments may result in small changes to sensor magnet as shown below Other methods of operation are possible location Dwg A 11 899 APPLICATIONS INFORMATION Extensive applications information on magnets and Hall effect sensors is also available in the Allegro Integrated and Discrete Semiconductors Data Book or Application Note 27701 115 Northeast Cutoff Box 15036 Worcester Massachusetts 01615 0036 508 853 5000 3185 THRU 3189 HALL EFFECT LATCHES FOR HIGH TEMPERATURE OPERATION PACKAGE DESIGNATOR LT SOT89 TO 243AA Dimensions in Inches Dimensions in Millimeters for reference only controlling dimensions 0 063 h 0 055 0 0173 I 0 0138 E 0 167 0 090 2 29 0 155 0 084 2 13 n B 0 0189 0 047 0 0142 0 035 0 0221 0 0173 0 059 BSC m gt 0 118 BSC pE Dwg MA 009 3A in Dwg MA 009 3A mm E ee fe a 9 Il lil 7 i i l E f J G JEn opal 0 028 al gt 0 031 TYP TYP ne Pads 1 2 3 and A Standard SOT89 Layout Pads 1 2 3 and A Standard SOT89 Layout Pads 1 2 3 and B Low Stress Version Pads 1 2 3 and B Low Stress Version Pads 1 2 and 3 only Lowest Stress But Not Self Aligning Pads 1 2 and 3 only Lowest Stress But Not Self Aligning Dwg MA 012 3 in Dwg MA 012 3 mm NOTES 1
5. ized package for most applications Suffix LT is a miniature SOT89 TO 243AA transistor package for surface mount applications suffix UA is pees a three lead ultra mini SIP Pinning is shown viewed from branded side ABSOLUTE MAXIMUM RATINGS FEATURES at Ta 25 C l l l Symmetrical Switch Points E E Vic Pa Temperature Stability Operation From Unregulated Supply Open Collector 25 mA Output Reverse Battery Protection Reverse Battery Voltage Vecc Magnetic Flux Density B Output OFF Voltage Vout Reverse Output Voltage Vout Activate With Small Commercially Available Permanent Magnets Solid State Reliability Small Size Continuous Output Current lout Operating Temperature Range TA 40 C to 85 C Resistant to Physical Stress Storage Temperature Range E l ee 65 C to 170 C Always order by complete part number the prefix A the basic four digit part number a suffix to indicate operating temperature range a suffix to indicate package style e g A3185ELT 3185 THRU 3189 HALL EFFECT LATCHES FOR HIGH TEMPERATURE OPERATION FUNCTIONAL BLOCK DIAGRAM 3 OUTPUT Dwg FH 005 3 ELECTRICAL CHARACTERISTICS over operating temperature range at Vcc 12 V Characteristic Symbol Test Conditions Min Typ Max Units a ve f o o e o av eee et MAGNETIC CHARACTERISTICS in gauss over operating supply voltage range Part Numbers A3185 A3187 A3188 A3189 over operati
6. nd package type LT or UA www allegromicro com 3185 THRU 3189 HALL EFFECT LATCHES FOR HIGH TEMPERATURE OPERATION SENSOR LOCATIONS OPERATION 0 005 0 13 mm die placement l l l l In operation the output transistor is OFF until the strength of the mag netic field perpendicular to the surface of the chip exceeds the threshold or Package Designators LT operate point Bop When the field strength exceeds Bop the output transis tor switches ON and is capable of sinking 25 mA of current ACTIVE AREA DEPTH ae The output transistor switches OFF when magnetic field reversal results NOM in a magnetic flux density below the OFF threshold Brp This is illustrated in the transfer characteristics graph A3187 shown Note that the device latches that 1s a south pole of sufficient strength will turn the device ON Removal of the south pole will leave the device ON The presence of a north pole of sufficient strength is required to turn the device OFF Powering up in the absence of a magnetic field less than Bop and higher than Brp will allow an indeterminate output state The correct state is warranted after the first excursion beyond Bop or Brp Dwg MH 008 4C Package Designators UA ACTIVE AREA DEPTH 2 0 0195 H 0 50 mm 9 NOM 2 LU lt l O gt N gt A O BRANDED SURFACE Dwg MH 011 4C FLUX DENSITY We Although sensor location is accurate to t
7. ng temp range 175 a aa over operating temp range 280 100 160 100 500 NOTES Bop operate point output turns ON Brp release point output turns OFF Bhys hysteresis Bop Brp As used here negative flux densities are defined as less than zero algebraic convention Complete part number includes a suffix to identify operating temperature range E or L and package type LT or UA 115 Northeast Cutoff Box 15036 Worcester Massachusetts 01615 0036 508 853 5000 Copyright 1995 2002 Allegro MicroSystems Inc 3185 THRU 3189 HALL EFFECT LATCHES FOR HIGH TEMPERATURE OPERATION TYPICAL OPERATING CHARACTERISTICS A3185 SWITCH POINTS A3187 SWITCH POINTS E Pt tf o o wo p D D lt q lt O O Z a z m Z Z Pt it ou ou lt Ir O O E E dp d9 RELEASE POINT 50 25 0 25 50 75 100 125 150 AMBIENT TEMPERATURE IN C AMBIENT TEMPERATURE IN C Dwg GH 026 Dwg GH 027 OUTPUT SATURATION VOLTAGE SUPPLY CURRENT 20 Lo gt a i z E z g O oc gt D z O O gt a lt A a D 2 D lt x p AMBIENT TEMPERATURE IN C AMBIENT TEMPERATURE IN C Baremoa Dwg GH 029 i SUPPLY CURRENT OPERATE POINT l Oo 15 i 0 2 0 5 10 15 2 SUPPLY VOLTAGE IN VOLTS SUPPLY VOLTAGE IN VOLTS Dwg GH 030 Dwg GH 037 SUPPLY CURRENT IN mA CHANGE IN OPERATE POINT IN GAUSS 5 Complete part number includes a suffix denoting operating temperature range E or L a
8. o 600 E L LT UA A3187x 50 to 175 175 to 50 100 to 350 E L LT UA 3077 3175 3177 A3188x 80 to 200 200 to 80 160 to 400 E L LT UA A3189x 50 to 250 250 to 50 100 to 500 E L LT UA 3075 3076 A3280x 5 to 40 40 to 5 10 to 80 E L LH LT UA chopper stabilized A3281x 15 to 90 90 to 15 30 to 180 E L LH LT UA chopper stabilized A3283x 100 to 180 180 to 100 lt 400 Typ 300 E L LH LT UA chopper stabilized PROTECTED LATCHING HALL EFFECT DIGITAL SWITCHES Partial Operate Release Hysteresis Part Point G Point G G Oper Number Over Oper Voltage amp Temp Range Temp Packages Comments A3195x 40 to 200 200 to 40 gt 110 Typ 220 E L U LT active pulldown A3197x 40 to 200 200 to 40 gt 110 Typ 230 E L U LT open collector output Notes 1 Typical data is at T 25 C and nominal operating voltage 2 X Operating Temperature Range suffix letter or prefix S UGN 20 C to 85 C E 40 C to 85 C 40 C to 115 C K UGS 40 C to 125 C L UGL 40 C to 150 C 115 Northeast Cutoff Box 15036 Worcester Massachusetts 01615 0036 508 853 5000
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Allegro 3185 THRU 3189 Manual