Differential Two-Wire Hall Effect Sensor IC

The Hall Effect sensor IC TLE4942 is designed to provide information about rotational speed, direction of rotation, assembly position and limit 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 is 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 monolithic integration of the active sensor areas and the signal conditioning.

Finally, the optimised piezo compensation and the integrated dynamic offset compensation enable easy manufacturing and elimination of magnet offsets.

The TLE4942C is additionally provided with an overmolded 1.8nF capacitor for improved EMI performance.

Features

• Two-wire PWM current interface

• Detection of rotation direction

• Airgap diagnosis

• Assembly position diagnosis

• Dynamic self-calibration principle

• Single chip solution

• No external components needed

• High sensitivity

• South and north pole pre-induction possible

• High resistance to piezo effects

• Large operating air-gaps

• Wide operating temperature range

• TLE4942C: 1.8nF overmolded capacitor