3280, 3281,
AND
3283
CHOPPER-STABILIZED,
PRECISION
HALL-EFFECT LATCHES
APPLICATIONS INFORMATION
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.
SUPPLY
3
OUTPUT
PTCT
2
0.1
µF
CC
V
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 applications information for Hall-effect sensors is available in:
•
Hall-Effect IC Applications Guide,
Application Note 27701;
•
Hall-Effect Devices: Soldering, Gluing, Potting, Encapsulating, and Lead Forming,
Application Note 27703.1;
•
Soldering of Through-Hole Hall-Sensor Dervices,
Application Note 27703; and
•
Soldering of Surface-Mount Hall-Sensor Devices,
Application Note 27703.2.
More detailed descriptions of the chopper-stabilized circuit operation can be found in:
•
Monolithic Magnetic Hall Sensor 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
9
X
1
SUPPLY
Dwg. EH-013
www.allegromicro.com
The products described herein are manufactured under one or
more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283;
5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719;
5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents
pending.
Allegro MicroSystems, Inc. reserves the right to make, from time to
time, such departures from the detail specifications as may be required
to permit improvements in the performance, reliability, or
manufacturability of its products. Before placing an order, the user is
cautioned to verify that the information being relied upon is current.
Allegro products are not authorized for use as critical components
in life-support appliances, devices, or systems without express written
approval.
The information included herein is believed to be accurate and
reliable. However, Allegro MicroSystems, Inc. assumes no responsi-
bility for its use; nor for any infringements of patents or other rights of
third parties that may result from its use.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
