A3195EU 查看數據表（PDF） - Allegro MicroSystems
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A3195EU Datasheet PDF : 10 Pages
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3195
PROTECTED, HIGH-TEMP.,
ACTIVE PULL-DOWN
HALL-EFFECT LATCH
SENSOR LOCATIONS
(±0.005" [0.13 mm]
die placement)
SUFFIX “LT”
ACTIVE AREA DEPTH
0.030"
0.76 mm
NOM
0.087"
2.21 mm
A
0.051"
1.30 mm
1
2
3
Dwg. MH-008-6A
SUFFIX “U”
ACTIVE AREA DEPTH
0.015"
0.38 mm
NOM
0.089"
2.26 mm
0.073"
1.85 mm
A
BRANDED
SURFACE
1
2
3
Dwg. MH-002-13A
APPLICATIONS INFORMATION
The A3195– latch has been optimized for use in
automotive ring magnet sensing applications. Such
applications include transmission speed sensors, motor
position encoders, and wheel bearing speed sensors.
Special care has been taken to optimize the operation of
these devices in automotive subsystems that require ISO
DP9637 protection but NOT operation. Short-circuit
protection is included to prevent damage caused by
pinched wiring harnesses. An on-chip pull-down resistor
is provided to allow device testing without the connection
of the control module.
A typical application consists of a ferrite ring magnet
located on a rotating shaft. Typically, this shaft is at-
tached to the transmission, the sensor is mounted on a
board, with care being taken to keep a tight tolerance on
the air gap between the package face and the magnet.
The device will provide a change in digital state at the
transition of every magnetic pole and, thus, give an
indication of the transmission speed. The high magnetic
hysteresis allows the device to be immune to vibration of
the magnet shaft and relatively good duty cycles can be
obtained.
Hall effect applications information is also available in
the Allegro Integrated and Discrete Semiconductors Data
Book or Application Note 27701.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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