ATS673LSETN-LT Allegro Microsystems Inc, ATS673LSETN-LT Datasheet - Page 15

• Manufacturer Part Number: ATS673LSETN-LT
• Description: IC SENSOR GEAR TOOTH 4LEAD
• Manufacturer: Allegro Microsystems Inc
• Type: Special Purposer

Specifications of ATS673LSETN-LT

• Sensing Range: 40% of Air Gap Trip, 50% of Air Gap Release
• Voltage - Supply: 3.3 V ~ 26.5 V
• Current - Supply: 11mA
• Current - Output (max): 20mA
• Output Type: Digital, Open Collector
• Features: Gear Tooth Type
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 4-SIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

ATS673 and
ATS674
Magnetic Profile
In order to establish the proper operating specification for a
particular ATS device and target system, a systematic evaluation
of the magnetic circuit should be performed. The first step is the
generation of a magnetic map of the target. By using a calibrated
device, a magnetic profile of the system is made. Figure 10 is a
magnetic map of the 8X reference target.
Optimized for Automotive Cam Sensing Applications
1600
1400
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1000
1300
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1100
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600
400
200
900
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Figure 10. Magnetic Data for the 8X Reference Target and SE package.
0
0
0
0
Air Gap Versus Magnetic Field, Reference Target 8X with SE Package
Device and Target Evaluation
Tooth
Valley
Magnetic Map, Reference Target 8X with SE Package
Self-Calibrating TPOS Gear Tooth Sensor ICs
1.0
60
120
2.0
Target Rotation (°)
AG (mm)
180
3.0
A pair of curves can be derived from this map data, and be used
to describe the tooth and valley magnetic field strength, B, versus
the size of the air gap, AG. This allows determination of the mini-
mum amount of magnetic flux density that guarantees operation
of the IC, so the system designer can determine the maximum
allowable AG for the device and target system. One can also
determine the TPOS air gap capabilities of the IC by comparing
the minimum tooth signal to the maximum valley signal.
240
4.0
300
5.0
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
360
6.0
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