Entry-Level linear Hall-Effect Sensor with SENT Output

TDK Corporation 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 now comes with digital output signal supervision and is as small, robust, and cost-effective as the already existing HAL 188x variants. The HAL 1890 is an optimal system solution to measure 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 transmission or as a steering torque sensor for industrial or recreational vehicles. Samples are available as of now. Start of production is planned for the second half of 2019.

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: 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.

The HAL 1890 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.

Glossary

• SENT = Single Edge Nibble Transmission

Main applications

• Detection of small angles of rotation in automotive applications, e.g., rotary shifters
• Detection of linear position in automotive applications, e.g., gear position sensing

Main features and benefits

• SENT output according to SAE J2716 Rev. 4
• Support of 3 and 6 data nibbles with secure information frame format (H.2 and H.4)
• Enhanced 8-bit ID serial message format
• Selectable clamping levels with selectable diagnosis
• Comprehensive diagnostic feature set
• Programming via output pin or supply voltage modulation
• Operates with static and dynamic magnetic fields of up to 5 kHz

For more information, visit https://www.micronas.com/en/tradenews/pr1905