Hall-effect sensor uses latest SENT protocol version

Hall-effect sensor uses latest SENT protocol version

New Products |
By Christoph Hammerschmidt

The HAL 1890 measures small angles of up to 90° or linear displacements of a few millimeters in harsh environments. For example, it may be used as a gear position detection sensor in dual-clutch automatic transmissions or as a steering torque sensor for industrial or recreational vehicles.

The sensor supports various SENT (Single Edge Nibble Transmission) data frame formats (H.2 and H.4) as well as error signal transmission on Fast and Slow channels. Several programmable output signal clamping levels extend the error signaling capabilities to indicate various fault conditions, such as under/overvoltage, under/overflow of the signal path, and overcurrent. To increase design flexibility, the signal path of the HAL 1890 enables external programming: major characteristics, like magnetic-field range, sensitivity, offset, and temperature coefficients, are programmable in non-volatile memory. A one-pin programming interface enables simultaneous programming of several sensors via their output pins. The HAL 1890 generates an accurate and customized output from a magnetic input signal and provides 10-bit output resolution supporting a maximum bandwidth of 5 kHz.

According to TDK-Micronas, the HAL 1890 retains the advantages of its predecessors in stringent application environments thanks to its protection functions and diagnostic capabilities. Additionally, it profits from the latest SENT protocol by transmitting not only sensor data and error codes but also other parameters, including sensor ID, magnetic range, sensitivity, and offset.

The sensor is qualified according to AEC-Q100 and is housed in an industry standard 3-pin TO92-UA package, lead free, with matte tin lead frame plating. It comes with two pin configurations: an in-line version with 1.27 mm pin-to-pin spacing or, alternatively, a spread-pin version with 2.54 mm pin-to-pin spacing, which is better suited for welding.

Samples are available as of now. Start of production is planned for the second half of 2019.

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