Linear Hall-Effect Sensor Provides SENT Output

TDK expands its Micronas linear Hall-effect sensor portfolio with the programmable HAL 1890 supporting the latest SENT protocol according to SAE J2716 Rev. 4. The HAL 1890 comes with digital output signal supervision and is as small, robust, and cost-effective as existing HAL 188x variants.

 

The HAL 1890 measures small angles 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 transmission or as a steering torque sensor for industrial or recreational vehicles.

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The sensor supports various SENT 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. The signal path of the HAL 1890 enables flexibility via external programming of 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. Additionally, the component 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 now with production planned for the second half of 2019.

 

For more details, datasheets are available.

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