SS275

CMOS Omnipolar High Sensitivity Micropower Hall Switch

1

V3.10 Nov 1, 2013

Features

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Solid-State Reliability much better than reed

switch

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Omnipolar, output switches with absolute value

of North or South pole from magnet

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Wide operating voltage range from 3.5V to 24V

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High sensitivity for direct reed switch replace-

ment applications

Applications

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Solid state switch

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Speed detection

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Interrupter

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Magnet proximity sensor for reed switch re-

placement

3 pin SOT23 (suffix SO)

3 pin SIP (suffix UA)

General Description

The SS275 Omnipolar Hall effect sensor IC is fabri-

cated from mixed signal CMOS technology .It incor-

porates advanced chopper-stabilization techniques to

provide accurate and stable magnetic switch points.

The output transistor of the SS275 will be latched on

North magnetic field facing the marked side of the

absence of a magnetic field.

The chopper stabilized amplifier uses switched capac-

itor techniques to eliminate the amplifier offset volt-

age, which, in bipolar devices, is a major source of

temperature sensitive drift. CMOS makes this ad-

vanced technique possible. The CMOS chip is also

much smaller than a bipolar chip, allowing very so-

phisticated circuitry to be placed in less space. The

small chip size also contributes to lower physical

stress and less power consumption.

Functional Block Diagram