A3144 Hall Effect Sensor - Components101

1 NOTE: For detailed information on purchasing options, contact your local Allegro field applications engineer or sales MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its Substitutions:Sensitive hall Effect Switches for High-Temperature OperationA3141, A3142, A3143, and A3144 For new customers and applications: for the A3141, refer to the A1101 for the A3142, refer to the A1102 for the A3143, refer to the A1103 for the A3144 , refer to the A1104 Date of status change: October 31, 2005 These parts are no longer in production The device should not be purchased for new design applications.

2 Samples are no longer ProductData *Always order by complete part number, , A3141 ELT .ABSOLUTE MAXIMUM RATINGSat TA = +25 CSupply Voltage, 28 VReverse Battery Voltage, -35 VMagnetic Flux Density, UnlimitedOutput OFF Voltage, 28 VReverse Output Voltage, VContinuous Output current , 25 mAOperating Temperature Range, TASuffix E .. -40 C to +85 CSuffix L .. -40 C to +150 CStorage Temperature Range, -65 C to +170 CThese hall - Effect switches are monolithic integrated circuits withtighter magnetic specifications, designed to operate continuously overextended temperatures to +150 C, and are more stable with bothtemperature and supply voltage changes. The unipolar switchingcharacteristic makes these devices ideal for use with a simple bar or rodmagnet. The four basic devices (3141, 3142, 3143, and 3144) areidentical except for magnetic switch device includes a voltage regulator for operation with supplyvoltages of to 24 volts, reverse battery protection diode, quadraticHall-voltage generator, temperature compensation circuitry, small-signal amplifier, Schmitt trigger, and an open-collector output to sinkup to 25 mA.

3 With suitable output pull up, they can be used withbipolar or CMOS logic circuits. The A3141 and A3142 are im-proved replacements for the UGN/UGS3140 ; the A3144 is theimproved replacement for the UGN/UGS3120 .The first character of the part number suffix determines the deviceoperating temperature range. Suffix E is for the automotive andindustrial temperature range of -40 C to +85 C. Suffix L is for theautomotive and military temperature range of -40 C to +150 C. Threepackage styles provide a magnetically optimized package for mostapplications. Suffix LT is a miniature SOT89/TO-243AA transistorpackage for surface-mount applications; suffix UA is a and BENEFITS Superior Temp. Stability for Automotive or Industrial Applications V to 24 V Operation.

4 Needs Only An Unregulated Supply Open-Collector 25 mA Output .. Compatible with Digital Logic Reverse Battery Protection Activate with Small, Commercially Available Permanent Magnets Solid-State Reliability Small Size Resistant to Physical StressPinning is shown viewed from branded hall - Effect SWITCHESFOR HIGH-TEMPERATURE OPERATION3141 THRU3144 Dwg. PH-003A1 SUPPLYVCCGROUND32 OUTPUTX3141 THRU 3144 SENSITIVEHALL- Effect SWITCHESFOR HIGH-TEMP. OPERATION115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 FUNCTIONAL BLOCK FH-005-2 GROUNDOUTPUT321 MAGNETIC CHARACTERISTICS in gauss over operating supply voltage : Typical values are at TA = +25 C and VCC = 8 = operate point (output turns ON); BRP = release point (output turns OFF); Bhys = hysteresis (BOP - BRP).

5 1 gauss (G) is exactly equal to millitesla (mT).*Complete part number includes a suffix to identify operating temperature range (E- or L-) and package type ( -LT or -UA).ELECTRICAL CHARACTERISTICS at VCC = 8 V over operating temperature Conditions Min. Typ. Max. UnitsSupply 24 VOutput Saturation VoltageVOUT(SAT)IOUT = 20 mA, B > BOP 175 400 mVOutput Leakage CurrentIOFFVOUT = 24 V, B < BRP <1. 01 0 ASupply CurrentICCB < BRP (Output OFF) 9. 0mAOutput Rise TimetrRL = 820 , CL = 20 pF sOutput Fall TimetfRL = 820 , CL = 20 pF sPart Numbers* A3141 A3142 A3143 A3144 CharacteristicMin. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. TA = 25 C5 01 0 016 0 13 018 023 0 22 028 034 0 7 0 35 0over operating temp.

6 Range 3 01 0 0175 115 18 0245 2 05 28 0355 35 45 0 BRPat TA = 25 C1 045 13 0 75 125 175 165 225 285 5 0 33 0over operating temp. range 1 045 145 6 0125 19 015 0225 3 0 0 25 43 0 Bhysat TA = 25 C2 055 8 0 3 055 8 0 3 055 8 0 2 055 over operating temp. range 2 055 8 0 3 055 8 0 3 055 8 0 2 055 Copyright 1993, 2002 Allegro MicroSystems, THRU 3144 SENSITIVEHALL- Effect SWITCHESFOR HIGH-TEMP. CURRENTSUPPLY CURRENT10152025 SUPPLY VOLTAGE IN VOLTS0 Dwg. GH-041-15 SUPPLY current IN B OPB B RPT = +25 CA0255075100 AMBIENT TEMPERATURE IN C-50 Dwg. GH-039-1125-25V = 8 VCCSUPPLY current IN B RPB B OPTYPICAL OPERATING CHARACTERISTICSA3142 SWITCH POINTSOUTPUT SATURATION VOLTAGE02550751003000 AMBIENT TEMPERATURE IN C200100-50 Dwg.

7 GH-040-1 SATURATION VOLTAGE IN mV150-25125I = 20 mAV = 24 VOUTCC050100 AMBIENT TEMPERATURE IN C-50 Dwg. GH-044 SWITCH POINT IN GAUSS300400200100 OPERATE POINTRELEASE POINTV = 8 V CC1500-252575125* Complete part number includes a suffix denoting operating temperature range (E- or L-) and package type ( -LT, -U, or -UA).3141 THRU 3144 SENSITIVEHALL- Effect SWITCHESFOR HIGH-TEMP. OPERATION115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 TYPICAL OPERATING CHARACTERISTICS (cont.)CHANGE IN OPERATE POINT10152025 SUPPLY VOLTAGE IN VOLTS0 Dwg. GH-042-15 CHANGE IN OPERATE POINT IN = +25 CAOPERATIONThe output of these devices (pin 3) switches low when the magnetic fieldat the hall element exceeds the operate point threshold (BOP).

8 At this point, theoutput voltage is VOUT(SAT). When the magnetic field is reduced to below therelease point threshold (BRP), the device output goes high. The difference inthe magnetic operate and release points is called the hysteresis (Bhys) of thedevice. This built-in hysteresis allows clean switching of the output even inthe presence of external mechanical vibration and electrical applications information for hall - Effect devices is available in: hall - Effect IC Applications Guide, Application Note 27701; hall - Effect Devices: Soldering, Gluing, Potting, Encapsulating, and LeadForming, Application Note ; Soldering of Through-Hole hall - Sensor Dervices, Application Note 27703;and Soldering of Surface-Mount hall - Sensor Devices, Application Note are provided in Allegro Electronic Data Book, AMS-702.

9 Or LOCATIONS( [ mm] die placement)132 Dwg. " mmNOMBRANDEDSURFACEACTIVE AREA " " mmASuffix UA Suffix LT " mm132 Dwg. " mmNOMACTIVE AREA " mmAAllegro3141 THRU 3144 SENSITIVEHALL- Effect SWITCHESFOR HIGH-TEMP. MA-009-3A MA-009-3A DESIGNATOR LT (SOT89/TO-243AA)Dimensions in Inches(for reference only)Dimensions in Millimeters(controlling dimensions)NOTES: body and lead configuration at vendor s option within limits in bulk pack (500 pieces per bag) or add "TR" to part number for tape and low-temperature ( 240 C) reflow-soldering techniques are recommended for SOT89 MA-012-3 inPads 1, 2, 3, and A Standard SOT89 LayoutPads 1, 2, 3, and B Low-Stress VersionPads 1, 2, and 3 only Lowest Stress, But Not Self MA-012-3 mmPads 1, 2, 3, and A Standard SOT89 LayoutPads 1, 2, 3, and B Low-Stress VersionPads 1, 2, and 3 only Lowest Stress, But Not Self THRU 3144 SENSITIVEHALL- Effect SWITCHESFOR HIGH-TEMP.

10 OPERATION115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Dimensions in Inches(controlling dimensions)Dimensions in Millimeters(for reference only)PACKAGE DESIGNATOR UA NOTES: on package height and width representallowable mold offsets. Dimensions given aremeasured at the widest point (parting line). body and lead configuration at vendor s optionwithin limits does not include mold gate minimum PWB hole diameter to cleartransition area is " ( mm). no tolerance is specified, dimension is in bulk pack (500 pieces per bag).Dwg. MH-014E NOTEDwg. MH-014E NOTER adial Lead Form (order A314xxUA-LC)NOTE:Lead-form dimensions are the nominals produced on theforming equipment. No dimensional tolerance is implied orguaranteed for bulk packaging (500 pieces per bag).