UGN3503 查看數據表（PDF） - Allegro MicroSystems
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UGN3503 Datasheet PDF : 8 Pages
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3503
RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS
NOTCH SENSOR
Dwg. A-12,574
GEAR TOOTH SENSOR
N
321
Dwg. A-12,512
CURRENT MONITOR
OPERATION
The output null voltage (B = 0 G) is nominally one-half the supply
voltage. A south magnetic pole, presented to the branded face of the Hall-
effect sensor will drive the output higher than the null voltage level. A north
magnetic pole will drive the output below the null level.
In operation, instantaneous and proportional output-voltage levels are
dependent on magnetic flux density at the most sensitive area of the device.
Greatest sensitivity is obtained with a supply voltage of 6 V, but at the cost of
increased supply current and a slight loss of output symmetry. The sensor's
output is usually capacitively coupled to an amplifier that boosts the output
above the millivolt level.
In two applications shown, a permanent bias magnet is attached with
epoxy glue to the back of the epoxy package. The presence of ferrous material
at the face of the package acts as a flux concentrator.
The south pole of a magnet is attached to the back of the package if the
Hall-effect IC is to sense the presence of ferrous material. The north pole of a
magnet is attached to the back surface if the integrated circuit is to sense the
absence of ferrous matrial.
Calibrated linear Hall devices, which can be used to determine the actual
flux density presented to the sensor in a particular application, are available.
SENSOR LOCATIONS
SUFFIX “U”
ACTIVE AREA DEPTH
0.0165"
0.42 mm
NOM
0.093"
2.37 mm
0.072"
1.83 mm
A
BRANDED
SURFACE 1
2
3
Dwg. A-12,513
SUFFIX “LT”
ACTIVE AREA DEPTH
0.0305"
0.775 mm
NOM
0.091"
2.32 mm
A
1
2
3
0.042"
1.08 mm
Dwg. MH-002-5D
SUFFIX “UA”
ACTIVE AREA DEPTH
0.0195"
0.50 mm
NOM
0.084"
2.13 mm
0.056"
1.43 mm
A
BRANDED
SURFACE 1
2
3
Dwg. MH-008-9A
Dwg. MH-011-3D
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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