Allegro MicroSystems A17501 Dual Output Speed & Sensor ICs

Allegro MicroSystems A17501 Dual Output Differential Speed and Direction Sensor ICs are designed for rotational position sensing of a ring magnet target found in automotive and industrial electric motor applications (often with specific application and safety requirements).

The Allegro MicroSystems A17501 incorporates three Hall elements to create two independent differential channels. These inputs are processed by digital circuits and robust algorithms designed to eliminate the detrimental effects of magnetic and system offsets and address false output transitions caused by target vibrations in electric motors at startup and low-speed operation. The differential signals are used to produce a highly accurate speed output and, if preferred, provide information on the direction of rotation.

Advanced calibration techniques are used to optimize signal offset and amplitude. This calibration, combined with the digital tracking of the signal, results in accurate switch points over air gap, speed, and temperature.

The A17501 can be programmed for various applications requiring dual-phase target speed and position signal information or simultaneous high-resolution target speed and direction information. The device can be configured to enable Fault Detection mode for ASIL B(D) utilization.

Features

High-speed switching bandwidth up to 40kHz
Two independent output channels with options for high-resolution XOR speed, pulse, and direction protocol
Optional fault detection output protocol