ATS643LSH-I1TN Allegro Microsystems Inc, ATS643LSH-I1TN Datasheet - Page 12

• 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
Start Mode Hysteresis. This feature helps to ensure optimal
self-calibration by rejecting electrical noise and low-amplitude
target vibration during initialization. This prevents AGC from
calibrating the IC on such spurious signals. Calibration can be
performed using the actual target features.
Figure 6. Operation of Start Mode Hysteresis
Position 1. At power-on, the ATS643 begins sampling V
Position 2. At the point where the Start Mode Hysteresis is exceeded, the device begins to establish switching thresholds (B
tinuous Update algorithm. After this point, Start Mode Hysteresis is no longer a consideration. Note that a valid V
Hysteresis can be generated either by a legitimate target feature or by excessive vibration.
Position 3. In this example, the first switchpoint transition is through B
If the first switchpoint transition had been through B
polarity. The first transition would occur at position 5 (B
Package Position Relative to Target
Target, Gear
Target Magnetic Profile
Differential Signal, V
Output Signal, I
Start Mode Hysteresis, PO
OUT
Gear Tooth Sensor IC with Continuous Update
PROC
RP
(such as position 4), no output transition would occur because I
OP
PROC
).
Self-Calibrating, Zero-Speed Differential
.
HYS
1
1
OP
. and the output transitions from high to low.
2
2
is a minimum level of the peak-to-peak amplitude of the internal
analog electrical signal, V
ATS643 starts to compute switchpoints.
A typical scenario is shown in figure 6. The hysteresis, PO
3
B
OP(#1)
4
B
RP(#1)
PROC
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1.508.853.5000; www.allegromicro.com
5
5
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
PROC
, that must be exceeded before the
B
OP(#2)
value exceeding the Start Mode
OUT
already would be in the high
OP
and B
RP
) using the Con-
HYS
12
,