SC9641 Datasheet

Two-Wire Differential Hall Effect Speed Sensor IC

The differential Hall Effect sensor SC9641 is designed to provide information about rotational speed to modern vehicle dynamics control systems and ABS. The output has been designed as a two wire current interface. Excellent accuracy and sensitivity are specified for harsh automotive requirements with a wide temperature range, high ESD and EMC robustness.

The regulated current output is configured for two-wire applications and the 2.0mm spacing between the dual Hall elements is optimized for fine pitch ring-magnet-based configurations.

The SC9641 is an optimized Hall Effect sensing integrated circuit that provides a user-friendly solution for ring-magnet sensing in two-wire applications. This small package can be easily assembled used in conjunction with a wide variety of target shapes and sizes.

The integrated circuit incorporates a dual-element Hall Effect sensor and signal processing that switches to differential magnetic signals created by ring magnet poles. The circuitry contains a sophisticated digital circuit to reduce system offsets and to calibrate the gain for air-gap-independent switch points.

The regulated current output is configured for two-wire applications and the sensor is ideally suited for obtaining speed and duty cycle information in ABS (antilock braking systems). The 2.7 mm spacing between the dual Hall elements is optimized for fine pitch ring-magnet-based configurations.

The device is packaged in a 2-pin TS Package. It is lead (Pb) free, with 100% matte tin plated leadframe.