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ATS612LSG Datasheet

  • ATS612LSG

  • DYNAMIC, SELF-CALIBRATING, PEAK-DETECTING, DIFFERENTIAL HALL...

  • 409.35KB

  • 15页

  • ALLEGRO   ALLEGRO

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ATS612LSG
DYNAMIC, SELF-CALIBRATING,
PEAK-DETECTING, DIFFERENTIAL
HALL-EFFECT GEAR-TOOTH SENSOR
The ATS612LSG gear-tooth sensor is a peak-detecting device
that uses automatic gain control to provide extremely accurate gear
edge detection down to low operating speeds. Each sensor module
consists of an over-molded package, which holds together a
samarium-cobalt magnet, a pole piece and a differential open-
collector Hall IC that has been optimized to the magnetic circuit.
This small package can be easily assembled and used in
conjunction with a wide variety of gear shapes and sizes.
The sensor incorporates a dual-element Hall IC that switches in
response to differential magnetic signals created by ferrous targets.
The sophisticated processing circuitry contains a 5-bit D/A
converter that self-calibrates (normalizes) the internal gain of the
device to minimize the effect of air-gap variations. The patented
peak-detecting filter circuit eliminates magnet and system offsets
and has the ability to discriminate relatively fast changes such as
those caused by tilt, gear wobble, and other eccentricities, yet
provides stable operation to extremely low RPM.
This sensor system is ideal for use in gathering speed, position,
and timing information using gear-tooth-based configurations. The
ATS612 is particularly suited to those applications that require
extremely accurate duty cycle control or accurate edge detection
such as in automotive crankshaft applications. The lower vibration
sensitivity also makes this device extremely useful for transmission
speed sensing.
Pin 1: Supply
Pin 2: Output
Pin 3: Capacitor
Pin 4: Ground
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
CC
..............................鈥?
24 V
Reverse Supply Voltage, V
RCC
.................
鈥?6 V
Output OFF Voltage, V
OUT
.........................
24 V
Continuous Output Current, I
OUT
............
25 mA
Reverse Output Current, I
ROUT
...............
50 mA
Package Power Dissipation, P
D
......
See Graph
Operating Temperature Range,
T
A
..............................
鈥?0掳C to +150掳C
掳
掳
Storage Temperature, T
S
......................
+170掳C
掳
Maximum Junction Temperature,
T
J
..................................................
165掳 C
掳
FEATURES AND BENEFITS
Fully Optimized Differential Digital Gear-Tooth Sensor
Single-Chip Sensing IC for High Reliability
Digital Output Representing Target Profile
Extremely Low Timing Accuracy Drift with Temperature
Large Operating Air Gaps
Small Mechanical Size
Optimized Magnetic Circuit
Patented Peak-Detecting Filter:
80 碌s Typical Power-On Time
<10 RPM Operation (single-tooth target)
Uses Small Value Ceramic Capacitors
Under-Voltage Lockout
Wide Operating Voltage Range
Defined Power-On State
ATS612G-DS Rev. 0a

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