A3290 Datasheet

IC型號：
A3290
PDF描述：
Chopper Stabilized, Precision Hall Effect Latches for Consum...
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245.74KB
PDF頁數(shù)：
8頁
芯片廠家：
ALLEGRO

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A3290 and A3291

Chopper Stabilized, Precision Hall Effect Latches for

Consumer and Industrial Applications

Features and Benefits

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Symmetrical switchpoints

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Resistant to physical stress

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Superior temperature stability

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Output short-circuit protection

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Operation from unregulated supply

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Reverse battery protection

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Solid-state reliability

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Small package size

Description

The A3290 and A3291 Hall effect latches are extremely

temperature-stable and stress-resistant sensors, especially

suited for operation over extended temperature ranges (up

to 125擄C). Superior high-temperature performance is made

possible through Dynamic Offset Cancellation, which reduces

the residual offset voltage normally caused by device package

overmolding, temperature dependencies, and thermal stress. The

two devices are identical except for their magnetic switchpoints.

They are not intended for automotive applications.

Both devices include, on a single silicon chip, a voltage regulator,

a Hall-voltage generator, a small-signal amplifier, chopper

stabilization, a Schmitt trigger, and a short-circuit protected

open-collector output to sink up to 25 mA. A south polarity

magnetic field of sufficient strength is required to turn the output

on. A north polarity field of sufficient strength is necessary to

turn the output off. An onboard regulator permits operation

with supply voltages in the range of 4.2 to 24 volts.

Two package styles provide a magnetically optimized package

for most applications. Type LH is a miniature SOT23W low-

profile surface-mount package, and type UA is a three-pin

ultramini SIP for through-hole mounting. Both packages are

lead (Pb) free with 100% matte tin leadframe plating.

Packages: 3 pin SOT23W (suffix LH), and

3 pin SIP (suffix UA)

Not to scale

Functional Block Diagram

VCC

Regulator

OUT

Sample and Hold

Dynamic Offset

Cancellation

Low-Pass

Filter

Control

Amp

Current Limit

GND

A3290-DS

型號

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描述

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