AH421 單極磁感測器

1.Introduction

AH421, unipolar Hall effect switch, designed with Bipolar technology, is south sensitive unipolar Hall Effective switch and includes on-chip Hall element voltage generator, a voltage regulator for operation with supply voltages of 3.5 to 40V, temperature compensation circuitry, small-signal amplifier, Schmitt trigger and an open-collector output.

The sensor is designed to respond to South poles. While the magnetic flux density(B) is larger than operate point Bop,   the output will be turned on with low output level. Then the output is held until the magnetic flux (B) is lower than release point Brp. The output will be turned off with high output level.

AH421 offers a variety of packages, including TO-92, SOT-23. All packages are RoHS compliant
 

2.Features
 Miniature construction

 High sensitivity of 60/40 Gauss   (typ.)

 Wide voltage range of 3.5 Vdc to 40 Vdc

 Temperature range of -40 °C to 125 °C

 Highest ESD performance up to ±4 kV

 Open Collector Output

3. Applications
 BLDC Motor Commutation

 Flow sensor

 Position sensor

 Speed sensor

 Proximity sensor
4.Package

5.Ordering information