MICROPOWER,

ULTRA-SENSITIVE

HALL-EFFECT SWITCHES

www.allegromicro.com

8

SENSOR LOCATIONS

Package Designator ‘LH’

Package Designator ‘UA’

OUTPUT

Dwg. EH-013-2

0.1

µF

SUPPLY

(3 V BATTERY)

10 pF

1

3

2

Dwg. MH-011-12

0.0195"

0.50 mm

NOM

BRANDED

SURFACE

ACTIVE AREA DEPTH

0.081"

2.07 mm

0.053"

1.33 mm

A

0.046"

0.85 mm

1

2

Dwg. MH-025-1

0.011"

0.28 mm

NOM

ACTIVE AREA DEPTH

0.059"

1.51 mm

A

3

Allegro

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

capacitor 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

technique. This is especially true due to the relatively high

impedance 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. Extensive 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

www.allegromicro.com

0

+B

0

Dwg. GH-043-1

-B

OUTPUT ON

5 V

MAX

BOPS

BRPS

B OPN

BRPN

MAGNETIC FLUX

OUTPUT OFF