PRELIMINARYL DATA SHEET SUBJECT CHANGE WITHOUT NOTICE Two-Wire, F

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PRELIMINARYL DATA SHEET SUBJECT CHANGE WITHOUT NOTICE Two-Wire, F

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A1140/42/43/45
PRELIMINARYL DATA SHEET SUBJECT CHANGE WITHOUT NOTICE
Two-Wire, Factory-Programmed, Chopper-Stabilized, Unipolar Hall-Effect Switch
A114X two-wire, unipolar, Hall-effect switch with factory programmability end-of-line optimization switch point accuracy. This device uses patented high frequency chopper-stabilization technique Allegro's most advanced BiCMOS wafer fabrication process achieve magnetic stability eliminate offset inherent single-element devices from harsh-application environments. This device provides on-chip transient protection. zener clamp power supply protects against over-voltage conditions supply line. output A1143 will switch HIGH presence sufficiently large south-pole magnetic field will switch with removal field. A1140/2/5 opposite polarity A1143, switching presence sufficiently large south-pole magnetic field. package styles provide magnetically optimized package most applications. Suffix "LH" miniature profile package surface-mount applications; suffix "UA" three-lead ultra-mini Single Inline Package (SIP) through-hole mounting.
typical application drawing pinning.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage 26.5 Reverse-Battery Voltage Magnetic Flux Density Unlimited Package Power Dissipation °C/W LH1.248 °C/W Junction Temperature, +170°C Operating Temperature Range,TA Suffix `E'.-40 Suffix `L'. +150 Storage Temperature Range +170
FEATURES BENEFITS Chopper Stabilization switch-point drift over temperature stress sensitivity Factory programmed end-of-line Optimized switch Points On-chip Protection Supply transient protection Robust ESD/EMC protection Reverse-battery protection On-board Voltage Regulator operation Order complete part number (i.e. A1142LUA).
"LH" based 0.062" thick FR4, single-sided board using copper, with 0.55 area copper attached ground lead.
TWO-WIRE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION SUBJECT CHANGE) CHARACTERISTICS
Valid over operating temperature range unless otherwise noted.
Part Number Characteristics Symbol Test Conditions Min. ELECTRICAL CHARACTERISTICS A114X A1140 Supply Voltage Supply Current IGND(L) IGND(H) A1142/3/5 Supply Current Output Rise Time Output Fall Time A114X
Limits Typ. Max. Units
Operating Output Output High Output Output High RL=100 Ohms, CBYP=0.1uF RL=100 Ohms, CBYP=0.1uF ton, 5us, bypass capacitor 10mA
HIGH
IGND(L) IGND(H)
Chopping Frequency Power-Up Time Power-Up State Zener Voltage
MAGNETIC CHARACTERISTICS Operate Point, A1140/2/3 Release Point, Hysteresis Operate Point, A1145 Release Point, Hysteresis BHYS 1140/2 1143 1140/2 1143 BHYS 1145 Bop, IGND Bop, IGND High BRP, IGND High BRP, IGND
Bop, IGND BRP, IGND High
Typical rise fall time Hall sensor 1us, true rise fall time dependent load circuit indicated 20us specification.
Rev. 18Apr03 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.
TWO-WIRE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION SUBJECT CHANGE)
FUNCTIONAL BLOCK DIAGRAM Supply
Program Lock
Programmming Logic
subcircuits
Offset Adjust
Clock/Logic
("UA" ONLY-Pin
A1140/2/5 Hysteresis Curve
A1143 Hysteresis Curve
IccHigh Output Current
IccHigh Output Current
IccLow Flux Density
IccLow Flux Density
Rev. 18Apr03 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.
TWO-WIRE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION SUBJECT CHANGE)
Typical Characterization Data data average Lot, >1000 Units
trim Vcc=24v Vcc= Vcc= 3.8v
Temperature
16.5 15.5 Current (mA)
Iccon
Vcc= Vcc= Vcc= 3.8v
Current (mA)
Iccoff
=24v =12v =3.8v
14.5 13.5 12.5 Temperature
Temperature
Rev. 18Apr03 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.
TWO-WIRE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION SUBJECT CHANGE)
Functional Description
Chopper-Stabilization Technique. limiting factor switch point accuracy when using Hall effect technology small signal voltage developed across Hall plate. This voltage proportionally small relative offset that produced output Hall sensor. This makes difficult process signal maintain accurate, reliable output over specified temperature voltage range. Chopper Stabilization unique approach used minimize Hall offset chip. Allegro patented technique; dynamic quadrature offs cancellation, removes sources output drift induced temperature package stress. This offset reduction technique based signal modulation-demodulation process. undesired offset signal separated from magnetically induced signal frequency domain through modulation. subsequent demodulation acts modulation process offset causing magnetically induced signal recover original spectrum base band while offset becomes high frequency signal. Then, using low-pass filter signal passes while modulated offset suppressed. chopper stabilization technique uses high frequency clock. Hall plate chopping occurs each clock edge resulting chop frequency. high frequency operation allows greater sampling, which produces higher accuracy faster signal processing capability. Using this chopper stabilization approach, chip desensitized effects temperature stress. This technique produces devices that have extremely stable quiescent Hall output voltage, immune thermal stress, precise recoverability after temperature cycling. This technique made possible through BiCMOS process which allows offset noise amplifiers combination with high-density logic integration sample hold circuits. repeatability switching with magnetic field slightly affected using chopper technique. Allegro's high frequency chopping approach minimizes affect jitter makes imperceptible most applications. Applications that notice degradation those that require precise sensing alternating magnetic fields such ring magnet speed sensing. those applications, Allegro recommends "low jitter" family digital sensors.
Regulator
Amplifier
Sample/ Hold
CLOCK
Hall Element
Concept Dynamic Quadrature Offset Cancellation
Rev. 18Apr03 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.
TWO-WIRE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION SUBJECT CHANGE) TYPICAL APPLICATION CIRCUIT
Applications. necessary that external bypass capacitor connected between supply ground device reduce both external noise noise generated chopper-stabilization technique. (The diagram below shows 0.01uF bypass capacitor) bypass capacitor should further than away from Hall sensor. bypass capacitor protect Hall only. high frequency interferences conducted along supply lines will passed directly load through bypass capacitor. Therefore, must have sufficient protection other than bypass capacitor placed parallel with Hall series resistor supply side, (not shown), combination with bypass capacitor will create filter pulses. (See Transient Table). series resistor (Rs) and/or sense resistor (Rsense) will have voltage drops across them that must considered minimum requirement device. preferred sense resistor value approximately ohms.
Typical Application pkg):
0.01uF
VSupply A114X
OUTPUT
Optional OUTPUT ONLY
RSENSE
Extensive applications information magnets Hall-effect sensors including Chopper-Stabilization available Allegro Electronic Data Book website: http://www.allegromicro.com
Rev. 18Apr03 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.
TWO-WIRE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION SUBJECT CHANGE)
DEVICE QUALIFICATION PROGRAM
Test Name
Pre/Post Test High Temperature Operating Life (HTOL) High Temperature Bake (HTB) Conditioning (PC) Temperature Humidity Bias (THB) HAST Autoclave (AC) Temperature Cycle (TC) External Visual (EV) Physical Dimensions (PD) Lead Integrity Bond Pull Strength Solderability (SD) Early Life Failure Rate (ELFR) Gate Leakage (GL) Electrical Distributions (ED) room, hot, cold 125°C 150°C CDF- AEC-Q100-006 JESD22-A108
Test Conditions
room, hot, cold 150°C, 170°C 170°C 85°C/85%RH 85°C/85%RH 130°C/85%RH 121°C/15 psig -65°C +150°C -50°C +150°C
Test Length
1000 1000 cycles 1000 cycles
Sample Lots
Comments
JESD22-A108 JESD22-A103 JESD22-A112 A113 JESD22-A101 JESD22-A110 JESD22-A102 JESD22-A104
model JESD22-A114 A115,CDFper step AEC-Q100-002, JESD22-B102
Requirements (Electromagnetic Compatibility)
Please contact your local representative results
Test Name
Human Body Model Machine Model Conducted Transients Direct Injection Bulk Current Injection Cell
Reference Specification
AEC-Q100-002 AEC-Q100-003 7637-1 11452-7 11452-4 11452-3
Rev. 18Apr03 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.
TWO-WIRE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION SUBJECT CHANGE)
POWER DE-RATING Maximum Allowable Power Calculation A118X Family
Assume: Tj(max) 170°C IONmax Then: Tmax Tjmax Then: PDmax Tmax °C/W 97.1 Then maximum 150°C therefore: Vccmax PDmax 97.1
internal power consumption, junction temperature higher than ambient environment temperature, nsure that device does operate above maximum rated junction temperature following calculations: Where: T=Vcc Where denotes temperature rise resulting from IC's power dissipation. sensor Tj(max) 170°C Pkg) 206°C/W Typical calculation: IccONtyp 14.5 14.5
Dissipation
Maximum Supply Voltage Ambient Temperature
Maximum Supply Voltage
206°C/W 35.8 35.8 60.8
Temperature (°C)
(ROJA 206°C/W) (ROJA 228°C/W)
"LH" based 0.062" thick FR4, single-sided board using copper, with 0.55 area copper attached ground lead. Rev. 18Apr03 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.
TWO-WIRE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION SUBJECT CHANGE)
Rev. 18Apr03 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.
TWO-WIRE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION SUBJECT CHANGE)
Rev. 18Apr03 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.
TWO-WIRE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION SUBJECT CHANGE)
Rev. 18Apr03 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.
TWO-WIRE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION SUBJECT CHANGE)
products described herein manufactured under more 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; other patents pending. Allegro MicroSystems, Inc. reserves right make, from time time, such departures from detail specifications required permit improvements performance, reliability, manufacturability products. Before placing order, user cautioned verify that information being relied upon current. Allegro products authorized critical components life-support appliances, devices, systems without express written approval. information included herein believed accurate reliable. However, Allegro MicroSystems, Inc. assumes responsibility use; infringements patents other rights third parties that result from use.
Rev. 18Apr03 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.

PRELIMINARYL DATA SHEET SUBJECT CHANGE WITHOUT NOTICE Two-Wire, F

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