ATS642LSHTN-I2-T Allegro Microsystems Inc, ATS642LSHTN-I2-T Datasheet

IC SENSOR GEAR TOOTH 4-SIP

ATS642LSHTN-I2-T

Manufacturer Part Number
ATS642LSHTN-I2-T
Description
IC SENSOR GEAR TOOTH 4-SIP
Manufacturer
Allegro Microsystems Inc
Type
Special Purposer
Datasheets

Specifications of ATS642LSHTN-I2-T

Output Type
Digital, Open Collector
Sensing Range
120mV Trip, 120mV Release
Voltage - Supply
4 V ~ 24 V
Current - Supply
8.4mA
Features
Gear Tooth Type
Operating Temperature
-40°C ~ 150°C
Package / Case
4-SIP
Termination Type
Through Hole
Bandwidth
40kHz
Current Rating
16.8mA
Operate Point Max
1000G
Supply Voltage Max
24V
Leaded Process Compatible
Yes
No. Of Pins
4
Hall Effect Type
Gear Tooth
Supply Voltage Min
4V
Rohs Compliant
Yes
Filter Terminals
Through Hole
Operate Point Min
30G
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Output (max)
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATS642LSHTN-I2-T
Manufacturer:
ALLEGRO
Quantity:
7 200
Features and Benefits
▪ Running mode calibration for continuous optimization
▪ Single chip IC for high reliability
▪ Internal current regulator for 2-wire operation
▪ Small mechanical size (8 mm diameter × 5.5 mm depth)
▪ Precise duty cycle signal over operating temperature range
▪ Large operating air gaps
▪ Automatic Gain Control (AGC) for air gap independent
▪ Automatic Offset Adjustment (AOA) for signal processing
▪ True zero-speed operation
▪ Undervoltage lockout
▪ Wide operating voltage range
Package: 4-pin Module (suffix SH)
Not to scale
ATS642LSH-DS, Rev. 1
switchpoints
optimization
Peak-Detecting Gear Tooth Sensor with Continuous Calibration
Automatic Offset
Tracking
Control
DAC
Amplifier
Hall
Two-Wire True Zero Speed Miniature Differential
AOA DAC
Peak Hold
Functional Block Diagram
AGC DAC
Gain Control
Gain
Description
The ATS642LSH is an optimized Hall effect sensing integrated
circuit and magnet combination that provides a user-friendly
solution for true zero-speed digital gear-tooth sensing in two-
wire applications. The sensor consists of a single-shot molded
plastic package that includes a samarium cobalt magnet, a
pole piece, and a Hall effect IC that has been optimized to the
magnetic circuit. This small package, with optimized two-wire
leadframe, can be easily assembled and used in conjunction
with a wide variety of gear shapes and sizes.
The integrated circuit incorporates a dual element Hall effect
sensor and signal processing that switches in response to
differential magnetic signals created by ferrous gear teeth.
The circuitry contains a sophisticated digital circuit to reduce
magnet and system offsets, to calibrate the gain for air gap
independent switchpoints, and to achieve true zero-speed
operation. Signal optimization occurs at power-up through
the combination of offset and gain adjust and is maintained
throughout the operating time with the use of a running mode
calibration. The running mode calibration allows immunity to
environmental effects such as microoscillations of the target
or sudden air gap changes.
The regulated current output is configured for two wire
applications and the sensor is ideally suited for obtain-
Continued on the next page…
Engineering samples available on a limited basis. Contact your local
sales or applications support office for additional information.
Internal Regulator
Test Signals
ATS642LSH
VCC
GND
Test

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ATS642LSHTN-I2-T Summary of contents

Page 1

Two-Wire True Zero Speed Miniature Differential Peak-Detecting Gear Tooth Sensor with Continuous Calibration Features and Benefits ▪ Running mode calibration for continuous optimization ▪ Single chip IC for high reliability ▪ Internal current regulator for 2-wire operation ▪ Small mechanical ...

Page 2

... The 1.5 mm Hall element spacing is optimized for fine pitch gear-tooth-based configurations. The package is lead (Pb) free, with 100% matte tin leadframe plating. Selection Guide Part Number ATS642LSHTN-I1-T 6.0 Low to 14.0 High mA ATS642LSHTN-I2-T 7.0 Low to 14.0 High mA ® *Contact Allegro for additional packing options Absolute Maximum Ratings Characteristic ...

Page 3

ATS642LSH Peak-Detecting Gear Tooth Sensor with Continuous Calibration OPERATING CHARACTERISTICS using reference target 60-0, T Characteristic Symbol ELECTRICAL CHARACTERISTICS 2 Supply Voltage V CC Undervoltage Lockout V CC(UV) Supply Zener Clamp Voltage V Supply Zener Current I I CC(Low) Supply ...

Page 4

ATS642LSH Peak-Detecting Gear Tooth Sensor with Continuous Calibration OPERATING CHARACTERISTICS (continued) using reference target 60-0, T Characteristic SWITCHPOINT CHARACTERISTICS Rotation Speed Analog Signal Bandwidth Operate Point Release Point CALIBRATION Initial Calibration DAC CHARACTERISTICS Allowable User-Induced Differential Offset 6 FUNCTIONAL CHARACTERISTICS ...

Page 5

ATS642LSH Peak-Detecting Gear Tooth Sensor with Continuous Calibration REFERENCE TARGET, 60-0 (60 Tooth Target) Characteristics Symbol Outside Diameter D o Face Width F Angular Tooth Thickness t Angular Valley Thickness t v Tooth Whole Depth h t Material Reference Gear ...

Page 6

ATS642LSH Peak-Detecting Gear Tooth Sensor with Continuous Calibration Supply Current (High) versus Ambient Temperature (ATS642-I1 - (°C) A Supply Current (Low) versus Ambient Temperature (ATS642- I1 -50 ...

Page 7

ATS642LSH Peak-Detecting Gear Tooth Sensor with Continuous Calibration *The trend of duty cycle versus air gap is driven by the actual magnetic profile of the target (see figure on page 5). Duty Cycle versus Ambient Temperature ...

Page 8

ATS642LSH Peak-Detecting Gear Tooth Sensor with Continuous Calibration Characteristic Allowable Air Gap Movement The colored area in the chart above shows the region of allow- able air gap movement within which the sensor will continue output switching. The output duty ...

Page 9

ATS642LSH Peak-Detecting Gear Tooth Sensor with Continuous Calibration THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information Characteristic Package Thermal Resistance *Additional information is available on the Allegro Web site. Two-Wire True Zero Speed Miniature Differential Symbol Test ...

Page 10

ATS642LSH Peak-Detecting Gear Tooth Sensor with Continuous Calibration Sensing Technology The gear tooth sensor subassembly contains a single-chip dif- ferential Hall effect sensor IC, an optimized samarium cobalt magnet, and a flat ferrous pole piece. The Hall IC possesses two ...

Page 11

ATS642LSH Peak-Detecting Gear Tooth Sensor with Continuous Calibration Automatic Gain Control (AGC) This feature allows the device to operate with an optimal internal electrical signal, regardless of the air gap (within the AG speci- fication). During calibration, the device determines ...

Page 12

ATS642LSH Peak-Detecting Gear Tooth Sensor with Continuous Calibration Power Supply Protection The device contains an on-chip regulator and can operate over a wide V range. For devices that need to operate from an CC unregulated power supply, transient protection must ...

Page 13

ATS642LSH Peak-Detecting Gear Tooth Sensor with Continuous Calibration Sensor Operation Each operating mode is described in detail below. Power-On When power (V > applied to the device, a short CC CCMIN period of time is required to ...

Page 14

ATS642LSH Peak-Detecting Gear Tooth Sensor with Continuous Calibration The device must be operated below the maximum junction temperature of the device Under certain combinations of J(max) peak conditions, reliable operation may require derating sup- plied power or improving ...

Page 15

ATS642LSH Peak-Detecting Gear Tooth Sensor with Continuous Calibration F 0.75 8.00±0.05 5.80±0.05 E1 1.70±0.10 4.00±0.10 5.00±0. 24.65±0.10 13.10±0.10 A Two-Wire True Zero Speed Miniature Differential Package SH Module F 0.75 Branded E2 Face 0.71±0.05 0.60±0.10 ...

Page 16

ATS642LSH Peak-Detecting Gear Tooth Sensor with Continuous Calibration Copyright ©2004-2009, Allegro MicroSystems, Inc. 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; ...

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