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Allegro 3213 AND 3214 Manual

1. 1 As used here negative flux densities are defined as less than zero algebraic convention and 50 Gis less than 10 2 Bop operate point output turns ON release point output turns OFF 3 Typical Data is at T4 25 and Vpp 3 0 V and is for design information only 4 gauss G is exactly equal to 0 1 millitesla mT www allegromicro com 4 3213 AND 3214 MICROPOWER ULTRA SENSITIVE HALL EFFECT SWITCHES TYPICAL OPERATING CHARACTERISTICS as a function of temperature Vpp 3 V 60 m JRPS o 20 0 I 20 0 0 40 100 150 4l d 50 TEMPERATURE T C A3213xx A3214xx EZ e AVG SUPPLY CURRENT Ipp UA AVG SUPPLY CURRENT a HA C 450 0 50 400 150 0 0 80 100 150 TEMPERATURE T C TEMPERATURE T C 180 170 OUTPUT ON VOLTAGE 50 0 50 100 150 TEMPERATURE T C 115 Northeast Cutoff Box 15036 Worcester Massachusetts 01615 0036 508 853 5000 a umm mp E MicroSystems Inc 3213 AND 3214 MICROPOWER ULTRA SENSITIVE HALL EFFECT SWITCHES TYPICAL OPERATING CHARACTERISTICS as a function of supply voltage T4 25 C 60 P HoPs 40 ea S 20 ERPS 0 3 4 5 T 0 E BRPH AD ui 40 SUPPLY VOLTAGE Vpp V A3213xx A3214xx 500 1 2 480 z 6 401 Ja C 350 C c zi 2
2. in hysteresis allows clean switching of the output even in the presence of external mechanical vibration and electrical noise As used here negative flux densities are defined as less than zero algebraic convention and 50 is less than 10 ES UHH OD MicroSystems Inc eO9ySlems ine 115 Northeast Cutoff Box 15036 Worcester Massachusetts 01615 0036 508 853 5000 3213 AND 3214 MICROPOWER ULTRA SENSITIVE HALL EFFECT SWITCHES OUTPUT OFF 5 Z PS OUTPUT VOLTAGE eee OUTPUT ON B 0 B MAGNETIC FLUX Dwg GH 043 1 Applications Allegro 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 capacitor 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 The simplest form of magnet that will operate these devices is a bar magnet with either pole near the branded surface of the device Many other methods of op
3. 3213 AND 3214 MICROPOWER ULTRA SENSITIVE HALL EFFECT SWITCHES The A3213xx and A3214xx integrated circuits are ultra sensitive pole Package Designator LH Pinning independent Hall effect switches with a latched digital output They are SOT23W especially suited for operation in battery operated hand held equipment such as cellular and cordless telephones pagers and palmtop computers A 2 4 volt to 5 5 volt operation and a unique clocking scheme reduce the average oper ating power requirements A3213xx to 825 uW the A3214xx to 14 uW typical at 2 75 V Except for operating duty cycle and average operating current the A3213xx and A3214xx are identical Unlike other Hall effect switches either a north or south pole of sufficient strength will turn the output on in the absence of a magnetic field the output is off The polarity independence and minimal power requirement allows these devices to easily replace reed switches for superior reliability and ease of manufacturing while eliminating the requirement for signal conditioning 109209270 DD Improved stability is made possible through chopper stabilization dy namic offset cancellation which reduces the residual offset voltage normally caused by device overmolding temperature dependencies and thermal stress These devices include on a single silicon chip a Hall voltage generator small signal amplifier chopper stabilization a latch and a MOSFET output Advanc
4. 50 gt 35 a 200 o 150 2 4 100 S 2 lt 50 a 0 0 2 3 4 5 2 3 4 5 SUPPLY VOLTAGE Vpp V SUPPLY VOLTAGE www allegromicro com 6 3213 AND 3214 MICROPOWER ULTRA SENSITIVE HALL EFFECT SWITCHES FUNCTIONAL DESCRIPTION Low Average Power Internal timing circuitry activates the sensor for 60 us and deactivates it for the remainder of the period 240 us for the A3213xx and 60 ms for the A3214xx A short awake time allows for stabilization prior to the sensor sampling and data latching on the falling edge of the timing pulse The output during the sleep time 15 latched in the last sampled state The supply current is not affected by the output state a PERIOD gt gt 60 us AWAKE IDD EN SLEEP 4 SAMPLE amp OUTPUT LATCHED IDD DIS 0 Dwg WH 017 1 Chopper Stabilized Technique The Hall element can be considered as a resistor array similar to a Wheatstone bridge A large portion of the offset 1s a result of the mismatching of these resistors These devices use a proprietary dynamic offset cancellation technique with an internal high frequency clock to reduce the residual offset voltage of the Hall element that 1s normally caused by device overmolding temperature depen dencies and thermal stress The chopper stabilizing technique cancels the mismatching of the resistor circuit by changing the direction of the current flowing through the Hall plate using CMOS switches and Hall volt
5. Northeast Cutoff Box 15036 Worcester Massachusetts 01615 0036 508 853 5000 ES mp MicroSystems Inc CNN 3213 AND 3214 MICROPOWER ULTRA SENSITIVE HALL EFFECT SWITCHES PACKAGE DESIGNATOR UA Dimensions in Millimeters for reference only Dimensions in Inches controlling dimensions 0 164 0 159 SEE NOTE Dwg MH 014E in 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 www allegromicro com SEE NOTE Dwg MH 014E mm Radial Lead Form order A321xxUA LC 0 620 0 500 15 7 mm 12 7 mm 0 100 Bis 2 5 mm I 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 Dwg MH 026 NOTE 10 3213 AND 3214 MICROPOWER ULTRA SENSITIVE HALL EFFECT SWITCHES The products described herein are manufactured under one or more of the following U S patents 4 761 569 5 619 137 5 621 319 In addition a patent is pending for Allegro s magnetic pole inde
6. age measurement taps while maintaing the Hall voltage signal that is induced by the external magnetic flux The signal is then captured by a sample and hold circuit and further processed using low offset bipolar circuitry This technique produces devices that have an extremely stable quiescent Hall output voltage are immune to thermal stress and have precise recoverability after tempera ture cycling This technique will also slightly degrade the device output repeatability A relatively high sampling frequency is used in order that faster signals can be processed More detailed descriptions of the circuit operation can be found in Technical Paper STP 97 10 Monolithic Magnetic Hall Sensor Using Dynamic Quadrature Offset Cancellation and Technical Paper STP 99 1 Chopper Stabilized Amplifiers With A Track and Hold Signal Demodulator V SAMPLE amp HOLD Dwg 012 1 HALL VOLTAGE Dwg AH 011 2 Operation The output of this device switches low turns on when a magnetic field perpendicular to the Hall sensor exceeds the operate point Bops or is less than After turn on the output is capable of sinking up to 1 mA and the output voltage is Voyrowy When the magnetic field is reduced below the release point Brps or increased above Brpn the device output switches high turns off The difference in the mag netic operate and release points is the hysteresis Bhys of the device This built
7. ed BiCMOS processing is used to take advantage of low voltage and low power requirements component matching very low input offset errors and small component geometries gt A O GROUND Dwg PH 016 1 Range E devices are rated for operation over a temperature range of Pinning is shown viewed from branded side 40 C to 85 C range L devices are rated for operation over a temperature range of 40 C to 150 C Two package styles provide a magnetically opti ABSOLUTE MAXIMUM RATINGS mized package for most applications LH is a miniature low profile surface at TA 25 C mount package UA is a three lead SIP for through hole mounting Each package is available in a lead Pb free version suffix 7 with a 100 matte tin plated leadframe Supply Voltage Vpp Magnetic Flux Density B FEATURES Micropower Operation Operate With North or South Pole 2 4 V to 5 5 V Battery Operation Junction Temperature T Chopper Stabilized Operating Temperature Range T4 Superior Temperature Stability _ Suffix E 40 C to 85 C Extremely Low Switch Point Drift Insensitive to Physical Stress Suffix L ESD Protected to 5 kV Solid State Reliability 65 C to 170 C Caution These CMOS devices have input Small PEE static protection Class 3 but are still sus Easily Manufacturable With Magnet Pole Independence ceptible to damage if exposed to extremely high static electrical charge
8. eration are possible Extensive applications information on magnets and Hall effect sensors is also available in the Allegro Electronic Data Book AMS 702 or Application Note 27701 or at www allegromicro com OUTPUT O SUPPLY 3 V BATTERY Dwg EH 013 2 SENSOR LOCATIONS Package Designator LH ACTIVE AREA DEPTH 0 011 0 28 mm NOM Package Designator UA Dwg MH 025 1 ACTIVE AREA DEPTH 0 0195 0 50 mm NOM BRANDED SURFACE Dwg MH 011 12 www allegromicro com 3213 AND 3214 MICROPOWER ULTRA SENSITIVE HALL EFFECT SWITCHES PACKAGE DESIGNATOR LH SOT23W fits SC 59A solder pad layout Dimensions in Inches for reference only 0 010 E BSC GAUGE PLANE 0 022 SEATING PLANE REF EDT 0 8 0 010 E 00079 _ 0 006 0 0050 0 045 0 000 032 4 ISN Dwg MA 010 3D in Dwg MA 011 3 in measured at the widest point parting line Dimensions in Millimeters controlling dimensions 3 10 3 00 GAUGE PLANE SEATING PLANE Dwg MA 010 3D mm Dwg MA 011 3 mm Tolerances on package height and width represent allowable mold offsets Dimensions given are Exact body and lead configuration at vendor s option within limits shown 2 3 Height does not include mold gate flash 4 Where no tolerance is specified dimension is nominal 5 Add LT to part number for tape and reel 115
9. exceeded unless Absolute Maximum Ratings page 1 are exceeded Pinning is shown viewed from branded side 115 Northeast Cutoff Box 15036 E Worcester Massachusetts 01615 0036 508 853 5000 is Microsystems ne Copyright 2003 Allegro MicroSystems Inc 3213 AND 3214 MICROPOWER ULTRA SENSITIVE HALL EFFECT SWITCHES ELECTRICAL CHARACTERISTICS unless otherwise noted over operating voltage and temperature range Limits Characteristic Symbol Test Conditions in t Supply Voltage Range NM Operating Output Leakage Current Ue Vout 5 5 V lt B lt lorF Vpp jour 1 mA Von 3 0 V A3214xx Duty Cycle A3213xx A3214xx EN Supply Current Chip awake enabled Chip asleep disabled IDD AVG A3213xx O A3214xx ESD Human Body Model Per CDF AEC Q100 002 ESD Machine Model oa Per JESD22 A115 NOTES 1 Operate and release points will vary with supply voltage 2 Bop operate point output turns ON Bgp release point output turns OFF 3 Typical Data is at T4 25 and Vpp 3 0 V and is for design information only MAGNETIC CHARACTERISTICS over operating voltage and temperature range Characteristic Symbol Test Conditions Min Typ Max Units Operate Points South pole to branded side 42 70 North pole to branded side 70 48 Release Points South pole to branded side 10 32 North pole to branded side 38 10 ops NOTES
10. pendent feature Allegro has several foreign counterpart patents as well Allegro has not licensed any of these patents to any third party 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 However Allegro MicroSystems Inc assumes no responsibil ity for its use nor for any infringements of patents or other rights of third parties that may result from its use 115 Northeast Cutoff Box 15036 11 Worcester Massachusetts 01615 0036 508 853 5000 y _ UHH OD MicroSystems Inc lt lt 7 7 7
11. s Output Off Voltage Output Current Iour storage Temperature Range jeeus geq 3213 AND 3214 MICROPOWER ULTRA SENSITIVE HALL EFFECT SWITCHES Product Selection Guide c RR oo Surface Mount A3213ELHLT T 3000 pieces reel m O A3213EUA EUN SIP through hole A3213EUA T 500 pieces bag 2 i pue Surface Mount A3213LLHLT T 3000 pieces reel v A3213LUA a ui SIP through hole A3213LUA T 500 pieces bag 2 Pre Surface Mount A3214ELHLT T et 3000 pieces reel n O A3214EUA SIP through hole A3214EUA T Aver ws 500 pieces bag DEL Surface Mount A3214LLHLT T 3000 pieces reel O A3214LUA Ez SIP through hole A3214LUA T 500 pieces bag Contact Allegro for additional packing options 115 Northeast Cutoff Box 15036 Worcester Massachusetts 01615 0036 508 853 5000 umm ED mie ystems Inc aT Ld 3213 AND 3214 MICROPOWER ULTRA SENSITIVE HALL EFFECT SWITCHES FUNCTIONAL BLOCK DIAGRAM I O GROUND DYNAMIC OFFSET CANCELLATION Dwg FH 020 5 Package Designator UA Pinning SIP PACKAGE SUFFIX UA ReJA 165 C W EN ALLOWABLE PACKAGE POWER DISSIPATION MILLIWATTS 222 A a Q gt z f 8 100 120 80 gt 5 Justin TEMPERATURE in C 2222 Dwg PH 016 NOTE Allowable package power dissipation will not be

Allegro 3213 AND 3214 Manual

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