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ATS612JSB Datasheet

  • ATS612JSB

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

  • 183.75KB

  • 16頁

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ATS612JSB
DYNAMIC, SELF-CALIBRATING,
PEAK-DETECTING, DIFFERENTIAL
HALL-EFFECT GEAR-TOOTH SENSOR
1
2
3
4
The ATS612JSB 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 subassembly
consists of a high-temperature plastic shell that 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 gear-sensing technology used for this sensor subassembly is
Hall-effect based. 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 A/D
converter that self-calibrates (normalizes) the internal gain of the device
to minimize the effect of air-gap variations. The patented peak-detect-
ing 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 eccentricities yet provides stable operation to extremely
low RPM.
These sensor systems are ideal for use in gathering speed, posi-
tion, and timing information using gear-tooth-based configurations. The
ATS612JSB is particularly suited to those applications that require
extremely accurate duty cycle control or accurate edge detection similar
to crank shaft applications. The lower vibration sensitivity also makes
this device extremely useful for transmission speed sensing.
ATS612JSB:
Large- or small-tooth gear-position sensing 鈥?/div>
crank angle, transmission speed, cam angle.
Data Sheet
27627.109
Pin 1 = Supply
Pin 2 = Output
Pin 3 = Capacitor
Pin 4 = Ground
Dwg. AH-006
ABSOLUTE MAXIMUM RATINGS
over operating temperature range
Supply Voltage, V
CC
...............................
24 V*
Reverse Supply Voltage, V
RCC
..............
-16 V
Output OFF Voltage, V
OUT
.......................
24 V
Continuous Output Current, I
OUT
......
25 mA鈥?/div>
Reverse Output Current, I
ROUT
............
50 mA
Package Power Dissipation,
P
D
..........................................
See Graph
Operating Temperature Range,
T
A
.................................
-40
擄
C to +115
擄
C*
Storage Temperature, T
S
..................
+170
擄
C
* Operation at increased supply voltages with
external circuitry is described in Applications
Information. Devices for operation at increased
temperatures are available on special order.
鈥?Output is current limited at 25 mA to 55 mA.
Continued operation in this mode can cause
excessive device heating and failure. See graph,
next page.
continued next page鈥?/div>
Always order by complete part number:
ATS612JSB
.

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    ALLEGRO
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    TRUE ZERO-SPEED HALL-EFFECT GEAR-TOOTH SENSOR
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