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3134 Datasheet(PDF) 4 Page - Allegro MicroSystems

Part No. 3134
Description  BIPOLAR HALL-EFFECT SWITCH FOR HIGH-TEMPERATURE OPERATION
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Maker  ALLEGRO [Allegro MicroSystems]
Homepage  http://www.allegromicro.com
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3134 Datasheet(HTML) 4 Page - Allegro MicroSystems

   
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3134
LOW-HYSTERESIS
BIPOLAR HALL-EFFECT SWITCH
FOR HIGH-TEMP. OPERATION
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
APPLICATIONS INFORMATION
Extensive applications information for Hall-effect sensors is available in:
• Hall-Effect IC Applications Guide, Application Note 27701;
• Hall-Effect Devices: Soldering, Gluing, Potting, Encapsulating, and Lead
Forming, Application Note 27703.1;
• Soldering of Through-Hole Hall-Sensor Dervices, Application Note 27703;
and
• Soldering of Surface-Mount Hall-Sensor Devices, Application Note 27703.2.
All are provided in Allegro Electronic Data Book, AMS-702. or at
www.allegromicro.com
OPERATION
The output of these devices (pin 3) switches low when the magnetic field
at the Hall sensor exceeds the operate point threshold (B
OP). At this point, the
output voltage is V
OUT(SAT). When the magnetic field is reduced to below the
release point (B
RP) the device output goes high. Note especially that release
can occur when the magnetic field is removed but to ensure release, a field
reversal is required. The difference in the magnetic operate and release points
is called the hysteresis (B
hys) of the device. This built-in hysteresis allows
clean switching of the output even in the presence of external mechanical
vibration and electrical noise.
Powering up the device in the absence of a magnetic field (less than B
OP
and higher than B
RP) will allow in indeterminate output state. The correct state
is warranted after the first excursion beyond B
OP or BRP.
Suffix “UA”
SENSOR LOCATIONS
(
±0.005" [0.13 mm] die placement)
1
3
2
Dwg. MH-011-4C
0.0195"
0.50 mm
NOM
BRANDED
SURFACE
ACTIVE AREA DEPTH
0.083"
2.10 mm
0.060"
1.51 mm
A
Suffix “LT”
1
3
2
Dwg. MH-008-4C
0.0305"
0.775 mm
NOM
ACTIVE AREA DEPTH
0.050"
1.27 mm
0.090"
2.27 mm
A
The products described herein are manufactured under one or more of the following
U.S. patents: 5,045,920; 5,264,783; 5,442,283; 5,389,889; 5,581,179; 5,517,112;
5,619,137; 5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; and
other patents pending.
Allegro MicroSystems, Inc. reserves the right to make, from time to time, such
departures from the detail specifications as may be required to permit improvements in
the performance, reliability, or manufacturability of its products. Before placing an
order, the user is cautioned to verify that the information being relied upon is current.
Allegro products are not authorized for use as critical components in life-support
appliances, devices, or systems without express written approval.
The information included herein is believed to be accurate and reliable. However,
Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringe-
ments of patents or other rights of third parties that may result from its use.


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