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Description

The A132X family of linear Hall-effect sensors are optimized,

sensitive, and temperature-stable. These ratiometric Hall-effect

sensors provide a voltage output that is proportional to the

applied magnetic field. The A132X family has a quiescent

output voltage that is 50% of the supply voltage and output

sensitivity options of 2.5mV/G, 3.125mV/G, and 5mV/G. The

features of this family of devices are ideal for use in the harsh

environments found in automotive and industrial linear and

rotary position sensing systems.

Each device has a BiCMOS monolithic circuit which integrates

a Hall element, improved temperature-compensating circuitry

to reduce the intrinsic sensitivity drift of the Hall element,

a small-signal high-gain amplifier, and a rail-to-rail low-

impedance output stage.

A proprietary dynamic offset cancellation technique, with

an internal high-frequency clock, reduces the residual offset

voltage normally caused by device overmolding, temperature

dependencies, and thermal stress. The high frequency clock

allows for a greater sampling rate, which results in higher

accuracy and faster signal processing capability. This technique

produces devices that have an extremely stable quiescent output

voltage, are immune to mechanical stress, and have precise

A1321-DS, Rev. 10

Features and Benefits

▪ Temperature-stable quiescent output voltage

▪ Precise recoverability after temperature cycling

▪ Output voltage proportional to magnetic flux density

▪ Ratiometric rail-to-rail output

▪ Improved sensitivity

▪ 4.5 to 5.5 V operation

▪ Immunity to mechanical stress

▪ Solid-state reliability

▪ Robust EMC protection

Ratiometric Linear Hall Effect Sensor

for High-Temperature Operation

Functional Block Diagram

Not to scale

Packages: 3 pin SOT23W (suffix LH), and

3 pin SIP (suffix UA)

A1321, A1322, and A1323

Continued on the next page…

Amp

GND

VOUT

VCC

Out

Offset

Trim

Control

Gain

0.1 μF

V+

Dynamic Offset

Cancellation

Filter

1 2 3 4 5 6 ... 10 11

A1321, A1322, and A1323 1
A1321, A1322 10

Indice de contenidos

Pagina 1 - A1321, A1322, and A1323

DescriptionThe A132X family of linear Hall-effect sensors are optimized, sensitive, and temperature-stable. These ratiometric Hall-effect sensors prov

Pagina 2

Ratiometric Linear Hall Effect Sensor for High-Temperature Operation A1321, A1322, and A1323 10Allegro MicroSystems, Inc.115 Northeast CutoffWorcester

Pagina 3

Ratiometric Linear Hall Effect Sensor for High-Temperature Operation A1321, A1322, and A1323 11Allegro MicroSystems, Inc.115 Northeast CutoffWorcester

Pagina 4

recoverability after temperature cycling. Having the Hall element and an amplifier on a single chip minimizes many problems normally associated with

Pagina 5

Ratiometric Linear Hall Effect Sensor for High-Temperature Operation A1321, A1322, and A1323 3Allegro MicroSystems, Inc.115 Northeast CutoffWorcester,

Pagina 6

Ratiometric Linear Hall Effect Sensor for High-Temperature Operation A1321, A1322, and A1323 4Allegro MicroSystems, Inc.115 Northeast CutoffWorcester,

Pagina 7

Ratiometric Linear Hall Effect Sensor for High-Temperature Operation A1321, A1322, and A1323 5Allegro MicroSystems, Inc.115 Northeast CutoffWorcester,

Pagina 8

Ratiometric Linear Hall Effect Sensor for High-Temperature Operation A1321, A1322, and A1323 6Allegro MicroSystems, Inc.115 Northeast CutoffWorcester,

Pagina 9

Ratiometric Linear Hall Effect Sensor for High-Temperature Operation A1321, A1322, and A1323 7Allegro MicroSystems, Inc.115 Northeast CutoffWorcester,

Pagina 10 - A1321, A1322

Ratiometric Linear Hall Effect Sensor for High-Temperature Operation A1321, A1322, and A1323 8Allegro MicroSystems, Inc.115 Northeast CutoffWorcester,

Pagina 11

Ratiometric Linear Hall Effect Sensor for High-Temperature Operation A1321, A1322, and A1323 9Allegro MicroSystems, Inc.115 Northeast CutoffWorcester,

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