A1184_06 Datasheet

IC型號：
A1184_06
PDF描述：
Standard Two-Wire Field-Programmable Chopper-Stabilized Unip...
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14頁
芯片廠家：
ALLEGRO

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A1184

Standard Two-Wire Field-Programmable Chopper-Stabilized

Unipolar Hall-Effect Switches

Features and Benefits

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Chopper stabilization

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Low switchpoint drift over operating

temperature range

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Low sensitivity to stress

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Field programmable for optimized switchpoints

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On-chip protection

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Supply transient protection

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Reverse-battery protection

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On-board voltage regulator

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3.5 to 24 V operation

Description

The A1184 device is a standard, two-wire, unipolar, Hall effect

switches. The operate point, B

, can be field-programmed,

after final packaging of the sensor and placement into the

application. This advanced feature allows the optimization of

the sensor switching performance, by effectively accounting

for variations caused by mounting tolerances for the device

and the target magnet.

This family of devices are produced on the Allegro

MicroSystems advanced BiCMOS wafer fabrication process,

which implements a patented, high-frequency, chopper-

stabilization technique that achieves magnetic stability and

eliminates the offsets that are inherent in single-element devices

exposed to harsh application environments. Commonly found

in a number of automotive applications, the A1184 is utilized to

sense: seat track position, seat belt buckle presence, hood/trunk

latching, and shift selector position.

Two-wire unipolar switches are particularly advantageous

in price-sensitive applications, because they require one

less wire than the more traditional open-collector output

switches. Additionally, the system designer gains inherent

diagnostics because output current normally flows in either

Continued on the next page鈥?/div>

Packages: 3 pin SOT23W (suffix LH), and

3 pin SIP (suffix UA)

Not to scale

Functional Block Diagram

V+

VCC

Program/Lock

Programming

Logic

Offset

Regulator

Clock/Logic

0.01 uF

Sample and Hold

Dynamic Offset

Cancellation

Low-Pass

Filter

Amp

GND

Package UA Only

GND

A1184-DS, Rev. 4

型號

版本

描述

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