Diodes AH920 User Manual download pdf

AH920

Document number: DS36768 Rev. 2 - 2

1 of 13

www.diodes.com

December 2013

AH920

A Product Line of

Diodes Incorporated

HIGH SENSITIVITY CMOS HALL-EFFECT LATCH

Description

The AH920 is a Hall-effect latch designed in mixed signal CMOS

technology. It is quite suitable for use in automotive, industrial and

consumer applications.

Superior high-temperature performance is made possible through

dynamic offset cancellation, which reduces the residual offset voltage

normally caused by device over-molding, temperature dependencies,

and thermal stress. The device integrates a voltage regulator, Hall-

voltage generator, small-signal amplifier, chopper stabilization, schmitt

trigger, and open-drain output.

An on-board regulator permits operation with supply voltage from

3.5V to 20V.

The AH920 is available in TO-92S-3 and SOT-23-3 packages, which

are optimized for most applications.

Features

 Wide Operating Voltage Range from 3.5V to 20V

 Symmetrical Switch Points

 Chopper-stabilized Amplifier Stage

 Superior Temperature Stability

 Open-drain Output

 Compact Size

 ESD Rating: 6000V (Human Body Model)

Pin Assignments

(Front View)

OUT

GND

VCC

TO-92S-3 (Z3 Package)

(Top View)

OUT

GND

VCC

SOT-23-3 (N Package)

Applications

 Brushless DC Motor Commutation

 Brushless DC Fan

 Solid-state Switch

 Revolution Counting

 Speed Detection

 High Sensitivity and Unconnected Switch

Typical Applications Circuit

AH920

VCC GND OUT

0.1mF

Output

CC1

CC2

AH920

GND

OUT

VCC

Output

0.1mF

1 2 3 4 5 6 ... 12 13

Summary of Contents

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Page 4

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Page 5 - Output=Low (For TO-92S-3)

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Page 6 - VCC GND OUT

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Page 9

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Page 10 - Ordering Information

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Page 12 - Location

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Page 13 - Diodes Incorporated

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Diodes AH920 User Manual

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