Diodes AH922 - Manual

Data Sheet
UNIPOLAR HALL-EFFECT SWITCH AH922
May 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
1
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