TLE49421CBAMA1 is a differential two-wire hall effect sensor IC for wheel speed applications with direction detection. It is designed to provide information about rotational speed, direction of rotation, assembly position, and limited airgap to modern vehicle dynamics control systems and ABS. The output has been designed as a two-wire current interface based on a Pulse Width Modulation principle. The sensor operates without external components and combines a fast power-up time with a low cut-off frequency. Excellent accuracy and sensitivity are specified for harsh automotive requirements as a wide temperature range, high ESD robustness, and high EMC resilience. State-of-the-art BiCMOS technology is used for the monolithic integration of the active sensor areas and the signal conditioning. Finally, the optimized piezo compensation and the integrated dynamic offset compensation enable easy manufacturing and elimination of magnet offsets.