3422
HALL-EFFECT,
DIRECTION-DETECTION
SENSOR IC
www.allegromicro.com
7
Applications Information
Operation with Fine-Pitch Ring Magnets. For
targets with a circular pitch of less than 4mm, a perfor-
mance improvement can be observed by rotating the front
face of the device (see below). This device rotation
decreases the effective element-to-element spacing,
provided that the Hall elements are not rotated beyond the
width of the target.
Applications.  It is strongly recommended that an
external 0.01 礔 bypass capacitor be connected (in close
proximity to the Hall elements) between the supply and
ground of the device to reduce both external noise and
noise generated by the internal logic.
The simplest form of magnet that will operate these
devices is a ring magnet. Other methods of operation,
such as linear magnets, are possible. Extensive applica-
tions information on magnets and Hall-effect devices is
also available in the Hsall-Effect IC Applications Guide
which can be found in the latest issue of the Allegro
MicroSystems Electronic Data Book, AMS-702 or Appli-
cation Note 27701, or at
www.allegromicro.com
Dwg. MH-024
?/DIV>
TARGET FACE WIDTH, F
>1.50 SIN ?/SPAN> (mm)
>0.059 SIN ?/SPAN> (inch)
A
0.059"
1.50 mm
1   2
4    5
3
A
1
2
4
5
3
Rotated device for
fine-pitch ring
magnets
相关PDF资料
AAH002-02 SENSORS MAGNETIC FIELD 8SOIC
AD221-00 SENS MAG SW 20G CROS AXIS 8-MSOP
ADH025-00 SENSOR MAG SW 10G CRS AXS 8-MSOP
ADL024-14E DIGITAL SWITCH 55HZ ULLGA
AFL300-00 SWITCH MAGNETIC DIG 5.5V 8MSOP
AH173-WL-7-A IC HALL SENSOR LATCH 25MA SC59-3
AH175-PL-B-B IC HALL SENSOR BIPO LATCH SIP-3L
AH1751-PG-A-A IC HALL SENSOR LATCH SIP-3
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