Datasheet > A3245_06

A3245_06

更新时间： 2024-09-23 03:16:31

品牌	Logo	应用领域
急速微 - ALLEGRO		开关
页数	文件大小	规格书
12页	367K
描述
Chopper-Stabilized Omnipolar Hall-Effect Switches

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A3245_06 数据手册

A3245

Chopper-Stabilized Omnipolar Hall-Effect Switches

Features and Benefits

Description

▪ Omnipolar operation

The A3245 integrated circuit is an omnipolar, ultrasensitive

Hall-effect switch with a digital output. This sensor has an

integrated regulator permitting operation to 24 V, making it

the first omnipolar switch available for operation to 24 V.

This device is especially suited for operation over extended

temperature ranges, up to +150°C. Superior high-temperature

performance is made possible through an Allegro^®patented

dynamic offset cancellation, which reduces the residual offset

voltage normally caused by device overmolding, temperature

excursions, and thermal stress.

▪ Chopper stabilization

▫ Superior temperature stability

▫ Extremely low switchpoint drift

▫ Insensitive to physical stress

▪ Reverse battery protection

▪ Output short circuit protection

▪ Solid state reliability

▪ Small size

▪ Robust EMC capability

▪ High ESD ratings (HBM)

TheA3245Hall-effectswitchincludesthefollowingonasingle

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.

Packages: 3 pin SOT23W (suffix LH), and

3 pin SIP (suffix UA)

The omnipolar operation of the A3245 allows activation with

either a north or a south polarity field of sufficient strength. In

the absence of a magnetic field, the output is off. This patented

Continued on the next page…

Not to scale

Functional Block Diagram

VCC

Regulator

To All Subcircuits

VOUT

Amp

Control

Current Limit

<1Ω

GND

A3245-DS, Rev. 2

12 3 4 5 6 7...12

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