CONCEPTUAL DATASHEET (subject change without notice) True Zero-Sp

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CONCEPTUAL DATASHEET (subject change without notice) True Zero-Sp

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ATS643LSH Conceptual
CONCEPTUAL DATASHEET (subject change without notice)
True Zero-Speed, Two-Wire, Miniature Gear Tooth Sensor
ATS643LSH optimized Hall-effect sensing integrated circuit magnet combination that provides user-friendly solution true zero-speed digital gear-tooth sensing two-wire applications. sensor consists single-shot molded plastic package that includes samarium cobalt magnet, pole piece, Hall effect that been optimized magnetic circuit. This small package easily assembled used conjunction with wide variety gear shapes sizes. integrated circuit incorporates dual element Hall-effect sensor signal processing circuitry that switches response differential magnetic signals created ferrous targets. device contains sophisticated compensating circuit eliminate magnet system offsets. Digital tracking analog signal used achieve true zero speed operation. converters used adjust device gain offset power resulting independent switch-points, which greatly improves output accuracy. regulated current output configured two-wire operation. This sensor ideal obtaining speed duty cycle information gear-tooth-based applications such transmission speed sensing.
Supply/Current Output Test Ground
BENEFITS FEATURES ABSOLUTE MAXIMUM RATINGS
Supply Voltage, 26.5 Reverse Supply Voltage, Operating Temperature Range, Storage Temperature, Package Power Rating, °C/W Maximum Junction Temperature, continuous Operation increased supply voltages temperatures
described Applications Information.
Fully optimized differential digital gear tooth sensor Single chip sensing high reliability Internal current regulator 2-wire operation Vibration immunity Small mechanical size length) independent switch-points Digital output representing gear profile Precise duty cycle over temperature Large operating gaps power time reference adjust circuit True zero-speed operation Under-voltage lockout Wide operating voltage range Defined power-on state
ATS643LSH TRUE ZERO-SPEED GEAR TOOTH SENSOR Allegro Confidential
Operating Characteristics: Valid over operating temperature range unless otherwise noted.
Characteristics Symbol Test Conditions Min. ELECTRICAL CHARACTERISTICS Supply Voltage Under Voltage Lockout Supply Zener Clamp Voltage Zener Pulse Current Supply Zener Resistance Supply Current ATS643LSH Supply Current ATS643LSH Supply Current Ratio VCC(UV) Current State: IccLow High Current State: IccHigh Current State: IccLow High Current State: IccHigh Ratio High Current Current Operating, 165°C Continuous t=20mS Pulse Mode 26.5 12.0 11.8 14.0 14.0 Vcc<V 16.0 16.8 Limits Typ. Max. Units
IccHigh IccLow
POWER-ON STATE CHARACTERISTICS Power-On State Power-On Time
Gear speed
IccHigh
OUTPUT STAGE Output Slew Rate mA/µs
Power Time time required complete internal automatic offset adjust; DAC's then ready peak acquisition. 2.1, MHN, 09.May.2003 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.
ATS643LSH TRUE ZERO-SPEED GEAR TOOTH SENSOR Allegro Confidential
Operating Characteristics: Valid with Reference Target unless otherwise specified
Characteristics Symbol Test Conditions Min. SWITCH POINT CHARACTERISTICS Rotation Speed Bandwidth Operate Point Release Point CALIBRATION Initial Calibration Disable CHARACTERISTICS Dynamic Offset Cancellation PDAC NDAC
Limits Typ. Max. Units
Smax f-3db Bop% Brp%
Reference Target peak peak referenced from PDAC NDAC, Agmax; peak peak referenced from PDAC NDAC, Agmax;
12,000
Rising Output Edges Accurate Edge Detection Rising Output Edges
Edges Edges
Number Bits Tracking Both Positive Negative Signal Peaks
device will compensate magnetic installation offsets gauss. Offsets greater than gauss cause inaccuracies output. 2.1, MHN, 09.May.2003 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.
ATS643LSH TRUE ZERO-SPEED GEAR TOOTH SENSOR Allegro Confidential
Characteristics
Symbol
Test Conditions Min.
Limits Typ. Max. Units
OPERATING CHARACTERISTICS: Using Reference Target Valid Over Operating Temperature Range Operational Range Maximum Operational Range Duty Cycle Variation Operating Signal Range Minimum Operating Signal
OpAG OpMaxAG SigMin
Duty cycle within specification Output Switching: Duty cycle within specifications Wobble 0.5mm Valid over operating range Duty cycle within Specification Output Switching: Duty Cycle Specification
1400
(Gauss) 100%
ATS643 Switchpoints Bop% Valley Tooth
Bop% Brp%
Brp%
(Gauss)
Operating dependent available magnetic field. available field target geometry materiel dependent should independently characterized. field available from reference target given reference gear parameter section datasheet. 2.1, MHN, 09.May.2003 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.
ATS643LSH TRUE ZERO-SPEED GEAR TOOTH SENSOR Allegro Confidential
Reference Gear Parameters
Characteristics Symbol Test Conditions Min. REFERENCE GEAR DIMENSIONS (60-0) Diameter Thickness Tooth Width Valley Width Valley Depth Material Carbon Steel Limits Typ. Max. Units
Differential Flux Density [Gauss]
Reference Gear Magnetic Profile Position over Tooth Valley Transitions
0.50mm 0.75mm 1.00mm 1.25mm 1.50mm 1.75mm 2.00mm
-100 -200 -300 -400 -500 -600 -700 Position
1800 1600 1400 1200
Reference Gear Peak Peak Field
1000 (mm)
2.1, MHN, 09.May.2003 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.
ATS643LSH TRUE ZERO-SPEED GEAR TOOTH SENSOR Allegro Confidential
MECHANICAL INFORMATION
Component Sensor Package Material Leads Lead Coating
Material Thermoset Epoxy Copper, 0.016" dia, 0.050" spacing Solder, Lead 90/10
Function Max. Temperature
Value 170°C
Temperature excursions 225°C minutes less permitted. Industry accepted soldering techniques acceptable this sub-assembly long indicated maximum temperatures each component exceeded. Please Allegro (http://www.allegromicro.com/) website soldering profile.
DEVICE QUALIFICATION PROGRAM
Test Name
Pre/Post Test High Temperature Operating Life (HTOL) High Temperature Bake (HTB) Conditioning (PC)
Test Conditions
Test Length
1000 1000 cycles 1000 cycles
Lots
Sample
Comments
JESD22-A108 JESD22-A103 JESD22-A112 A113 JESD22-A101 JESD22-A110 JESD22-A102 JESD22-A104
room, hot, cold 150°C, 170°C 170°C 85°C/85%RH 85°C/85%RH Temperature Humidity Bias (THB) HAST 130°C/85%RH 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 121°C/15 psig -65°C +150°C -50°C +150°C
model JESD22-A114 A115,CDFper step AEC-Q100-002, JESD22-B102 JESD22-A108 CDF- AEC-Q100-006
2.1, MHN, 09.May.2003 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.
ATS643LSH TRUE ZERO-SPEED GEAR TOOTH SENSOR Allegro Confidential
FUNCTIONAL BLOCK DIAGRAM
Hall
Offset Adjust
INTERNAL REGURATOR
PDAC
THRESHP REFERENCE GENERATOR UPDATES
THRESH LOGIC
NDAC
THRESHN
VNeg
TYPICAL APPLICATIONS CONFIGURATION
Ion/Ioff
wire
ATS643 0.01uF
Battery
Sensor Assembly
2.1, MHN, 09.May.2003 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.
ATS643LSH TRUE ZERO-SPEED GEAR TOOTH SENSOR Allegro Confidential
SENSOR PACKAGE
PACKAGE REFERENCE DIMENSIONS ONLY
2.1, MHN, 09.May.2003 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.
ATS643LSH TRUE ZERO-SPEED GEAR TOOTH SENSOR Allegro Confidential
Allegro MicroSystems, Inc. reserves right make, from time time, such departures from detail specifications required permit improvements design products. information included erein believed accurate reliable. However, Allegro MicroSystems, Inc. assumes responsibility use; infringements patents other rights third parties which result from use.
2.1, MHN, 09.May.2003 Page
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1993, 1995 Allegro MicroSystems, Inc.

CONCEPTUAL DATASHEET (subject change without notice) True Zero-Sp

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