Angular sensor communicates via SENT protocol

March 17, 2014 // By Graham Prophet
NXP’s KMA215 is an angular sensor with digital output, designed to meet changing needs in the automotive industry; it is compliant with the most recent Single Edge Nibble Transmission (SAE J2716 JAN2010 SENT) standard.

The KMA215 is also ready for future designs, already supporting 12-bit High-Speed transmission with doubled frame rate, which is under consideration for future SENT releases. Suitable for all automotive applications where a mechanical angle needs to be measured, the KMA215 offers superior ElectroMagnetic Compatibility (EMC) performance and significantly reduces system costs by eliminating the need for external components. It is particularly valuable for all power train applications where high accuracy and robustness is essential.

Completely calibrated and ready to use, the KMA215 combines full sensor systems including capacitors in a single package. It meets the most recent SENT protocol, the standard interface in motor management control units, and delivers a modern mid-sized signal sensor architecture, ensuring accurate digital data processing and transmission. The KMA215 combines NXP’s latest MR and ABCD9 technology. The angular sensor has a push-pull output with pulse shaping, which helps reduce its emission profile without external components.

The KMA215 implements Cyclic Redundancy Check (CRC) and Error Detection and Correction (EDC) protection, as well as magnet loss and broken bond wire detection. It operates at temperatures of up to 160C, in comparison to the industry average of 150C. This is vital for use in EGR (exhaust gas recirculation) applications, where every degree in temperature counts. It is automotive qualified in accordance to AEC-Q100 Rev-G; has programmable user adjustments including angular range and zero angle; and includes fail-safe non-volatile memory with write protection using lock bit.



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