The datasheet details specifications, operating characteristics, and application information for Allegro MicroSystems' A3046EU/LU, A3056EU/LU, and…
Allegro MicroSystems' Hall effect gear‑tooth sensors (A3046EU/LU, A3056EU/LU, A3058EU/LU) are monolithic ICs that detect differential magnetic fields from ferrous gear teeth, providing zero‑speed operation for speed, position, and timing applications. They can be configured for various switching modes and are suitable for automotive ABS, ignition timing, and industrial speed‑measurement systems.
The datasheet lists electrical parameters such as a 4.5‑24 V supply range, 20 mA output current, and temperature ranges of –40 °C to +85 °C (EU) or –40 °C to +150 °C (LU). It also covers magnetic characteristics, recommended magnet materials, pole‑piece design, and assembly techniques to achieve reliable operation across wide air gaps and temperatures.
| Supply Voltage (VCC) | 4.5 – 24 V |
|---|---|
| Maximum Output Current (IOUT) | 20 mA |
| Operating Temperature Range (EU) | -40 °C to +85 °C |
| Operating Temperature Range (LU) | -40 °C to +150 °C |
| Package Type | 3‑pin plastic SIP |
The sensors operate with a supply voltage between 4.5 V and 24 V.
Each sensor can source up to 20 mA of output current.
The EU version operates from –40 °C to +85 °C, while the LU version operates from –40 °C to +150 °C.
Each sensor IC contains two integrated Hall transducers.