A3230

The A3230 Hall-effect sensor is a temperature stable, stress-resistant bipolar  switch. This sensor is the most sensitive Hall-effect device in the Allegro® bipolar  switch family and is intended for ring-magnet sensing. Superior high-temperature  performance is made possible through an Allegro patented dynamic offset cancel- lation that utilizes chopper-stabilization. This method reduces the offset voltage  normally caused by device overmolding, temperature dependencies, and thermal stress.

The A3230 includes the following on a single silicon chip: a voltage regulator,  Hall-voltage generator, small-signal amplifi  er, chopper stabilization, Schmitt trigger, and a short circuit protected open-drain output. Advanced BiCMOS wafer  fabrication processing takes advantage of low-voltage requirements, component  matching, very low input-offset errors, and small component geometries