TLE4945-2G

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Linear Hall effect sensors have been increasingly utilized in a variety of fields, from industrial automation to consumer electronics. The TLE4945-2G is an example of a Hall effect linear sensor designed for contactless position sensing and angular adjustment. This application note provides an overview of the TLE4945-2G\'s features, application fields, and implementation.

The TLE4945-2G is a small, low-cost Hall effect sensor operating from two supply voltages from 9 V to 24 V. It is designed to sense angular acceleration and movement of shafts and disk-like objects. It is suitable for applications in industrial, automotive, consumer, and other fields.

The TLE4945-2G can be configured for either a 3-wire or a 4-wire connection. In the 3-wire configuration, the device has two sensor signals (S1 and S2) and one common-mode signal (COM), which is generated internally from the two sensor signals. In the 4-wire configuration, the device has an additional connection for the reference voltage (REF). This connection allows the user to match the output voltage of the device with the desired reference voltage value.

The output of the TLE4945-2G is a linear voltage over the sensing range. It is ratiometric, meaning that it changes proportionally as the supply voltage changes. The slope of the voltage output depends on the supply voltage; with a 12 V supply, the slope is 750 mV/radian. In addition, the device has Hysteresis and is temperature compensated over the entire operating range. These features ensure a stable output signal when the shaft moves continuously.

The TLE4945-2G is designed for operation in the presence of high magnetic fields. It has a linear working range of ±20 mT and can be operated in magnetic fields up to ±50 mT without significant performance degradation. This makes it suitable for use in a variety of applications, such as motor commutation, where high magnetic fields are present.

The TLE4945-2G also features over-voltage protection and short circuit protection. The over-voltage protection protects the device from excessive voltages that can be present in some environments, while the short circuit protection prevents the output from being shorted to ground.

In conclusion, the TLE4945-2G is a highly versatile and reliable Hall effect linear sensor for contactless position sensing and angular adjustment. It is suitable for a wide range of applications, from industrial automation to consumer electronics. It features a linear output over its sensing range, has hysteresis and temperature compensation for stability, and is designed to withstand high magnetic fields.

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