1.1 Target Application

The differential Hall Effect sensor TLE4953 is designed to provide information about rotational speed and direction

of rotation to modern transmission and ABS systems. 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 wide frequency range. 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 optimized piezo compensation and the integrated dynamic offset compensation enable

easy manufacturing and elimination of magnetic offsets. Adaptive hysteresis concept increases the noise

immunity. The TLE4953C is additionally provided with an overmolded 1.8 nF capacitor for improved EMI

performance.

1.2 Features

? Two-wire PWM current interface

? Detection of rotation direction

? Dynamic self-calibration principle & high sensitivity

? Adaptive hysteresis

? Single chip solution - no external components

? Vibration suppression in calibrated mode

? South and north pole pre-induction possible

? High resistance to piezo effects

? Large operating air-gaps

? Wide operating temperature range

? From zero speed up to 12 kHz

? 1.8 nF overmolded capacitor

? For coarse transmission target wheels

? Module style package with integrated overmolded capacitor1)

– 1.8nF between VDD and GND

? AEC-Q100 qualified