allegro microsystems a3230 is the most sensitive hall effect device in the allegro bipolar switch family and is intended for ring-magnet sensing. it has extremely low switchpoint drift, insensitive to physical stress, reverse battery protection and output short circuit protection. the switch features superior high-temperature performance through an allegro patented dynamic offset cancellation that utilizes chopper-stabilization. this method reduces the offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress.
The A3230 is a chopper‑stabilized Hall‑effect bipolar switch with built‑in voltage regulation, short‑circuit protection, and high ESD ratings. It operates in both south and north magnetic fields and is offered in two package styles for surface‑mount and through‑hole mounting.
The document includes detailed electrical and magnetic characteristics, thermal derating curves, functional block diagrams, and recommended application guidelines such as the use of an external bypass capacitor to reduce noise.
| Supply Voltage (VCC) Operating Range | 3.6 – 24 V |
|---|---|
| Output Current Limit | 30 – 60 mA |
| Operating Temperature (E range) | -40°C to 83°C |
| Operating Temperature (L range) | 40°C to 150°C |
A 0.14 µF capacitor placed close to the Hall sensor between supply and ground is typical.
The device operates from 40 °C up to 150 °C in the L temperature range.
The output current limit is specified as 30 mA to 60 mA.