Chopper-Stabilized, Precision

Hall-Effect Latches

A3280, A3281

and

A3283

9

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

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.

The simplest form of magnet that will operate these devices is

a ring magnet. Other methods of operation, such as linear mag-

nets, are possible.

Extensive applications information for Hall-effect devices is

available in:

• Hall-Effect IC Applications Guide, Application Note 27701;

• Guidelines for Designing Subassemblies Using Hall-Effect De-

vices, Application Note 27703.1

More detailed descriptions of the chopper-stabilized circuit opera-

tion can be found in:

• Monolithic Magnetic Hall Sensing Using Dynamic Quadrature

Offset Cancelation, Technical Paper STP 97-10; and

• Chopper-Stabilized Amplifiers With A Track-and-Hold Signal

Demodulator, Technical Paper STP 99-1.

All are provided at

www.allegromicro.com

APPLICATIONS INFORMATION

SUPPLY

OUTPUT

Dwg. EH-013

0.1 F

SUPPLY