3212
MICROPOWER,
ULTRA-SENSITIVE
HALL-EFFECT SWITCHES
SENSOR LOCATIONS
5V
MAX
OUTPUT OFF
B OPN
B OPS
(±0.005 [0.13 mm] die placement)
OUTPUT VOLTAGE
Package Designator ‘LH’
ACTIVE AREA DEPTH
0.011"
0.28 mm
NOM
0.059"
1.49 mm
3
0.038"
0.96 mm
BRPN
0
-B
0
BRPS
OUTPUT ON
+B
Dwg. GH-043-1
A
1
2
Dwg. MH-025
MAGNETIC FLUX
Applications.
Allegro's pole-independent sensing technique
allows for operation with either a north pole or south pole
magnet orientation, enhancing the manufacturability of the
device. The state-of-the-art technology provides the same
output polarity for either pole face.
It is strongly recommended that an external bypass capaci-
tor be connected (in close proximity to the Hall sensor) between
the supply and ground of the device to reduce both external
noise and noise generated by the chopper-stabilization tech-
nique. This is especially true due to the relatively high imped-
ance of battery supplies.
The simplest form of magnet that will operate these devices
is a bar magnet with either pole near the branded surface of the
device. Many other methods of operation are possible. Exten-
sive applications information on magnets and Hall-effect
sensors is also available in the
Allegro Electronic Data Book
AMS-702 or
Application Note
27701, or at
Package Designators ‘UA’, UA-LC', and ‘UA-TL’
ACTIVE AREA DEPTH
0.0195"
0.50 mm
NOM
0.081"
2.06 mm
0.057"
1.45 mm
A
BRANDED
SURFACE
1
2
3
www.allegromicro.com
Dwg. MH-011-11A
OUTPUT
10 pF
Although sensor location is accurate to three sigma for a
particular design, product improvements may result in small
changes to sensor location.
2
DD
50 kΩ
SUPPLY
(3 V BATTERY)
0.1
µF
Dwg. EH-013-2
3
V
1
6
X
Allegro
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
SANKEN [ SANKEN ELECTRIC ]
