The differential Hall sensor IC detects the motion of tooth and magnet encoder applications. To detect the motion of ferromagnetic objects, the magnetic field must be provided by a back biasing permanent magnet. Either south or north pole of the magnet can be attached to the rear unmarked side of the IC package.The magnetic measurement is based on three equally spaced Hall elements, integrated on the IC. Both magnetic and mechanical offsets are cancelled by a self calibration algorithm. The sensor includes a current output PWM protocol.
- High magnetic sensitivity
- Large operating airgap
- Two wire PWM current interface
- Fast start-up
- Dynamic self calibration principle
- Adaptive hysteresis
- Detection of rotation direction
- High vibration suppression capability
- From zero speed up to 12 kHz
- Wide operating temperature ranges
- High resistance to piezo effects
- Single chip solution
- Magnetic encoder and ferromagnetic wheel application
- South and north pole pre-induction possible
- Module style package with integrated overmolded capacitor
- 1.8 nF between V DD and GND
The TLE4955C is an integrated differential Hall effect sensor for transmission applications with two wire PWM output current interface. Its basic function is to provide information about rotational speed and direction of rotation to the transmission control unit. TLE4955C includes a sophisticated algorithm which actively suppresses vibration while keeping excellent air gap performance.
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