Inductive sensor IC processes two coil sets simultaneously

Melexis has introduced the MLX90514, a dual-input inductive sensor integrated circuit. The device processes signals from two sets of coils simultaneously to compute differential or vernier angles on-chip. The sensor is designed for automotive applications, including steering torque feedback, steering angle sensing, and steering rack motor control in steer-by-wire implementations.

The MLX90514 integrates differential and vernier angle calculations within the IC, which reduces processing requirements on the host system. The device represents Melexis’ first dual inductive application-specific standard product. It combines multiple interface options with on-chip processing capabilities. Interface configurations include SENT, SPC, and PWM for standalone modules, and SPI for embedded module applications.

The sensor computes position information, such as differential or vernier angles, directly, which eliminates the need for multiple ICs in system designs. The SENT/SPC output accommodates up to 24-bit payload capacity, enabling transmission of two synchronized 12-bit channels for torque and angle sensing applications.

The MLX90514 operates with zero-latency synchronized dual-channel functionality. An additional input allows the sensor to read PWM signals from external sources, such as magnetic sensors. This configuration enables the device to combine and process multi-turn angle and torque data within a single component.

The IC handles small inductive input signals, which supports compact coil designs and tighter PCB layouts. This capability allows for smaller sensing modules without affecting performance parameters. The MLX90514 enables ASIL D-compliant sensing systems as a Safety Element out of Context (SEooC) for automotive steering torque and angle applications.

The MLX90514 inductive interface sensor is available now.