A3230_06 Datasheet

IC型號：
A3230_06
PDF描述：
Chopper-Stabilized Hall-Effect Bipolar Switch
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362.80KB
PDF頁數(shù)：
12頁
芯片廠家：
ALLEGRO

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A3230

Chopper-Stabilized Hall-Effect Bipolar Switch

Features and Benefits

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Chopper stabilization

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Superior temperature stability

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Extremely low switchpoint drift

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Insensitive to physical stress

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Reverse battery protection

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Output short circuit protection

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Solid state reliability

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Small size

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Robust EMC capability

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High ESD ratings (HBM)

Description

The A3230 Hall-effect sensor is a temperature stable, stress-

resistant bipolar switch. This sensor is the most sensitive

Hall-effect device in the Allegro

廬

bipolar switch family and

is intended for ring-magnet sensing. Superior high-temperature

performance is made possible through an Allegro patented

dynamic offset cancellation that utilizes chopper-stabilization.

This method reduces the offset voltage normally caused by

device overmolding, temperature dependencies, and thermal

stress.

The A3230 includes the following on a single silicon chip:

a 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 takes advantage of low-voltage

requirements, component matching, very low input-offset

errors, and small component geometries.

The A3230 Hall-effect bipolar switch turns on in a south

polarity magnetic field of sufficient strength and switches

off in a north polarity magnetic field of sufficient strength.

Because the output state is not defined if the magnetic field is

Packages: 3 pin SOT23W (suffix LH), and

3 pin SIP (suffix UA)

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Not to scale

Functional Block Diagram

VCC

Regulator

To All Subcircuits

Sample and Hold

Dynamic Offset

Cancellation

Low-Pass

Filter

VOUT

Amp

Control

Current Limit

<1惟

GND

3230-DS, Rev. 2

型號

版本

描述

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