a3242lua Allegro MicroSystems, Inc., a3242lua Datasheet

a3242lua

Manufacturer Part Number

a3242lua

Description

A3241 And A3242 Chopper-stabilized Unipolar Hall-effect Switches

Manufacturer

Allegro MicroSystems, Inc.

Datasheet

1.A3242LUA.pdf (12 pages)

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Company:

Bonase Electronics (HK) Co., Limited

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a3242lua-T

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Features and Benefits

▪ Chopper stabilization

▪ Reverse battery protection

▪ Output short circuit protection

▪ Solid state reliability

▪ Small size

▪ Robust EMC capability

▪ High ESD ratings (HBM)

Packages: 3 pin SOT23W (suffix LH), and

3 pin SIP (suffix UA)

Not to scale

A3241-DS, Rev. 4

▫ Superior temperature stability

▫ Extremely low switchpoint drift

▫ Insensitive to physical stress

VCC

Chopper-Stabilized Unipolar Hall-Effect Switches

Amp

Functional Block Diagram

Amp

Description

The A3241 and A3242 integrated circuits are unipolar Hall-

effect switches with digital outputs. These sensors are suited

for operation over extended temperature ranges, up to +150°C.

Superior high-temperature performance is made possible

through an Allegro

which reduces the residual offset voltage normally caused

by device overmolding, temperature excursions, and thermal

stress.

The A3241 and A3242 Hall-effect switches include the

following on a single silicon chip: voltage regulator, Hall-

voltage generator, small-signal amplifier, chopper stabilization,

Schmitt trigger, and a short circuit protected open-drain output.

Advanced BiCMOS wafer fabrication processing is used to

take advantage of low-voltage requirements, component

matching, very low input-offset errors, and small component

geometries.

The integrated voltage regulator permits operation from 3.6 to

24 V. The unipolar family members operate with a sufficient

south polarity field only, turning off in the absence of such a

south polarity field.

Continued on the next page…

Regulator

To All Subcircuits

Current Limit

Control

patented dynamic offset cancellation,

A3241 and A3242

GND

<1Ω

VOUT

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