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. 8

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+