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Data Sheet

UNIPOLAR HALL-EFFECT SWITCH

AH922

May 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

General Description

The AH922 is a unipolar Hall-effect one-chip switch

with digital output, solution for sense magnetic field.

It is designed in mixed signal CMOS and chopper

technology. This IC is quite suitable for use in

automotive, industrial and consumer applications.

The two sensors are suited for operation over

extended temperature ranges.

The AH922 Hall-effect switch is combined with a

voltage regulator, Hall-voltage generator, chopper

small-signal amplifier, Schmitt trigger and

open-drain output.

The AH922 is available in TO-92S-3 and SOT-23-3

packages.

Features

• Wide Operating Voltage Range

• Chopper Stabilization

• Extremely Low Switch Point Drift

• Superior Temperature Stability

• High Sensitivity Integrated Hall Sensor

• Solid State Reliability

• Robust EMC Capability

Applications

• 5V/12V DC Brushless Motor/Fan

• Solid State Switch

• Speed Detection

• Revolution Counting

Figure 1. Package Types of AH922

TO-92S-3 SOT-23-3

1 2 3 4 5 6 ... 14 15