NXP Semiconductors KMA310/AZ

Overview

KMA310/A from NXP Semiconductors is a single-channel magnetoresistive (MR) programmable angle sensor IC integrating MR bridges and mixed-signal circuitry in one package. It delivers ratiometric analog voltage or SENT-compliant digital output (SAE J2716), supports 12-bit angular resolution, operates up to 180 °C, and features factory calibration with user-programmable zero angle, angular range, and clamping voltages for automotive throttle and steering position sensing.

For engineers reviewing the KMA310/A datasheet, KMA310/A pinout, KMA310/A application, or KMA310/A equivalent, this page provides verified technical context on its CORDIC-based angle calculation, SENT protocol format support (A.1/H.1, A.3/H.4, H.3), fail-safe NVM programming via one-wire interface, ASIL-C capability, and diagnostic behavior including pre-warning and power-loss detection.

Technical Context

The KMA310/A converts orthogonal MR bridge signals into digital angle data using a coordinate rotation digital computer (CORDIC) algorithm, followed by DAC conversion for analog output or SENT frame encoding for digital transmission. Its internal state machine handles offset cancellation, angular range adjustment, and clamping control.

Digital output complies with SAE J2716 SENT revisions FEB2008 (rev 2), JAN2010 (rev 3), and APR2016 (rev 4), supporting three protocol formats: dual-throttle A.1/H.1, single-secure A.3/H.4, and high-speed 12-bit H.3 - each with configurable clock tick (2.7–6 µs), CRC type, and PAUSE pulse insertion.

Key Specifications

Pinout & Package

Package: SIL3 plastic single-ended multi-chip package (SOT1288-3), 3-pin in-line lead configuration with integrated EMC filters and PCB-less design optimization.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar magnetic angle sensing applications.

Compared with AMS AS5055A and Infineon TLE5012B, the KMA310/A uniquely integrates SENT output, ASIL-C capability, lock-bit protected NVM, and 180 °C operation in a single-package solution - reducing system-level complexity for automotive safety-critical angle sensing.

Availability

KMA310/A is available at Aetrix Electronics and suitable for automotive throttle control, steering angle feedback, brake pedal position sensing, and electric power steering motor rotor positioning requiring stable component supply and long-term lifecycle support.

Supply support for KMA310/A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The KMA310/A belongs to NXP's high-temperature, safety-certified magnetic sensor product line, designed specifically for automotive angle sensing in demanding environments where reliability, programmability, and functional safety are critical.

FAQ

What output interfaces does the KMA310/A support?

The KMA310/A supports two mutually exclusive output modes selected via register bit SYS_SETTING[12]: ratiometric analog voltage (0–VDD) or SENT digital output compliant with SAE J2716. Analog mode provides linear angular representation; SENT mode encodes 12-bit angle data in frames (A.1/H.1, A.3/H.4, or H.3 formats) with CRC and diagnostic nibbles. Both modes share the same OUT/DATA pin.

How is the KMA310/A programmed and calibrated?

The KMA310/A is factory-calibrated and pre-programmed for immediate use. Final user adjustments - including zero angle, angular range, clamping voltages, and SENT settings - are performed via its one-wire interface (OWI) on the OUT/DATA pin. Configuration data is stored in lock-bit protected non-volatile memory (NVM); once locked, values cannot be altered, ensuring field reliability.

Does the KMA310/A meet automotive safety standards?

Yes, the KMA310/A is ISO 26262 ASIL-C capable as a safety element out of context (SEooC). It implements multiple hardware safety mechanisms - including CORDIC range check, SD-ADC monitoring, and built-in self-test (BIST) - and supports diagnostic features such as pre-warning and diagnostic bits in the SENT STATUS nibble. It is also AEC-Q100 Rev-H qualified for automotive use.

What is the maximum operating temperature of the KMA310/A?

The KMA310/A is rated for continuous operation from −40 °C to +180 °C, making it suitable for under-hood automotive applications such as throttle bodies, brake pedals, and EPS motor housings. This extended temperature range is enabled by its monolithic MR sensor integration, robust packaging (SOT1288-3), and internal thermal supervision via an auxiliary ADC.

Can the KMA310/A operate without external components?

Yes, the KMA310/A is designed as a module-ready solution with integrated filters, regulators, and capacitors - eliminating the need for external bypass capacitors, RC networks, or discrete protection devices. Its SIL3 package and PCB-less design allow direct mounting onto metal substrates or heat sinks, simplifying mechanical integration and improving EMC performance in noisy automotive environments.