------Question for A1324LUA-T Please Put your question below------
Hello @gregsl3
The output very much depends on the strength and orientation of the external magnet. From the datasheet:
The presence of a south-polarity magnetic field
perpendicular to the branded surface of the package increases the
output voltage from its quiescent value toward the supply voltage
rail.
This video may help out readers understand the operation of the linear sensor.
Happy soldering,
APDahlen
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Hey @gregsl3 ,
For the A1324LUA-T, which is a linear Hall-effect sensor in the 3-pin through-hole UA package, the output voltage response is determined by the magnetic flux density and polarity relative to the branded face of the device. The A1324 is a ratiometric sensor, meaning that with a 5V supply and no magnetic field present, the quiescent output voltage will sit at approximately 2.5V.
To achieve a positive increase in the output voltage moving from 2.5V toward the supply rail, a South polarity magnetic field must be applied to the branded face of the package, which is the side containing the Allegro logo and the “324” part marking. Conversely, applying a North polarity field to the branded face will cause the output voltage to decrease toward 0V. The Hall-effect sensing element is located approximately 0.50 mm below this branded surface, so for the most accurate and linear response, the center of your magnet should be aligned with the center of the package face at the specified air gap.
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