Micropower Ultra-Sensitive Hall-Effect Switch

A1172

9

Allegro MicroSystems, LLC

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

VDD

GND

VOUTPN

A1172

VOUTPS

Outputs

0.1 μF

It is strongly recommended that an external bypass capacitor be

connected (in close proximity to the Hall element) between the

supply and ground of the device to reduce both external noise

and noise generated by the chopper stabilization technique. As is

shown in figure 2, a 0.1

μF capacitor is typical.

Extensive applications information on magnets and Hall-effect

devices is available in the following notes:

• Hall-Effect IC Applications Guide, AN27701

• Hall-Effect Devices: Gluing, Potting, Encapsulating, Lead

Welding and Lead Forming AN27703.1

• Soldering Methods for Allegro Products (SMD and Through-

Hole), AN26009

All are provided in Allegro Electronic Data Book, AMS-702,

and on the Allegro Web site, www.allegromicro.com.

Figure 2. Typical Application Circuit

Applications