ATS643LSH-I1TN Allegro Microsystems Inc, ATS643LSH-I1TN Datasheet - Page 11

• Manufacturer Part Number: ATS643LSH-I1TN
• Description: IC SENSOR GEAR TOOTH 4-SIP
• Manufacturer: Allegro Microsystems Inc
• Type: Special Purposer

Specifications of ATS643LSH-I1TN

• Sensing Range: 65% Trip, 35% Release
• Voltage - Supply: 4 V ~ 24 V
• Current - Supply: 8mA
• 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
• Current - Output (max): -

ATS643LSH
Power-On State Operation. The ATS643 is guaranteed to
power-on in the high current state, I
Initial Edge Detection. The device self-calibrates using the
initial teeth sensed, and then enters Running mode. This results
in reduced accuracy for a brief period (less than four teeth),
Figure 5. Power-on initial edge detection. This figure demonstrates four typical power-on scenarios. All of these examples assume that the target is
moving relative to the package in the direction indicated. The length of time required to overcome Start Mode Hysteresis, as well as the combined effect
of whether it is overcome in a positive or negative direction plus whether the next edge is in that same or opposite polarity, affect the point in time when
AGC calibration begins. Three high peaks are always required for AGC calibration.
Package Position
Target
(Gear)
Power-on
over valley
Start Mode
Power-on
at rising edge
Overcome
Hysteresis
Start Mode
Overcome
Hysteresis
Power-on
over tooth
Power-on
at falling edge
Start Mode
1
1
Overcome
Hysteresis
2
2
Start Mode
Overcome
CC(High)
Hysteresis
3
3
Gear Tooth Sensor IC with Continuous Update
.
4
4
AGC Calibration
Output
Output
Output
Self-Calibrating, Zero-Speed Differential
V
V
V
V
PROC
PROC
PROC
PROC
AGC Calibration
AGC Calibration
AGC Calibration
Output
however, it allows the device to optimize for continuous update
yielding adaptive sensing during Running mode. As shown in
figure 5, the first three high peak signals are used to calibrate
AGC. However, there is a slight variance in the duration of
initialization, depending on what target feature is nearest the
package when power-on occurs.
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
Running Mode
Running Mode
Running Mode
Running Mode
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