Melexis Technologies NV EVB90380

Overview

EVB90380 from Melexis is an evaluation board designed to demonstrate and validate the MLX90380 Triaxis® resolver sensor IC for absolute rotary position sensing. It supports both SOIC-8 and TSSOP-16 variants of the MLX90380, provides configurable 3.3V/5V supply routing, enables magnetic axis selection (X/Y, X/Z, Z/Y), and delivers true 360° sine/cosine analog outputs with 4 µs output refresh rate for high-speed motor control applications.

For engineers reviewing the EVB90380 datasheet, pinout, applications, or equivalent options, this board enables rapid prototyping of resolver-based angle measurement in brushless motor control, field-oriented control (FOC), and end-of-shaft or through-shaft configurations - with on-board test points, jumper-selectable supply voltage, and direct connection to MCU ADC inputs.

Technical Context

The EVB90380 implements a dedicated hardware interface for the MLX90380's dual-die TSSOP-16 and single-die SOIC-8 packages, including isolated ground paths, decoupling networks per supply rail (C1 = 100 nF, C2/C3 = 2.2 nF), and configurable VDD3V3/VDD5V routing per application diagram. It exposes all functional pins-including OUT1 (COS), OUT2 (SIN), TEST, and NC terminals-for signal probing and programming.

Board-level design supports factory-programmed MLX90380 variants across SmCo/NdFeB/Ferrite magnet types and sensitivity ranges (10–70 mT), with jumper options to float VDD3V3 during 5V operation and route test pins to ground for optimal EMC. No on-board microcontroller or signal processing is included - the board functions strictly as a sensor interface and signal conditioning platform.

Key Specifications

Availability

EVB90380 is available at Aetrix Electronics and suitable for brushless motor control, field-oriented control (FOC), absolute angular position feedback, and industrial servo system development requiring stable component supply and rapid sensor validation.

Supply support for EVB90380 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

Melexis is a Belgian semiconductor company specializing in intelligent sensors and driver ICs for automotive and industrial applications, with leadership in contactless position sensing and magnetic sensor technology.

The EVB90380 belongs to Melexis' Triaxis® evaluation platform family, engineered specifically to accelerate development of high-accuracy, high-reliability angular position systems using the MLX90380 resolver IC in demanding motor control environments.

FAQ

What is the primary function of the EVB90380 evaluation board?

The EVB90380 evaluation board is a hardware platform designed exclusively to interface, power, and validate the MLX90380 Triaxis® resolver sensor IC. It provides physical mounting, proper decoupling, supply configuration (3.3 V or 5 V), and accessible test points for OUT1 (COS) and OUT2 (SIN) signals - enabling engineers to verify angular position accuracy, output timing, and magnetic axis behavior before integrating the MLX90380 into final designs. The EVB90380 itself contains no active logic or firmware.

Does the EVB90380 support both SOIC-8 and TSSOP-16 versions of the MLX90380?

Yes, the EVB90380 is mechanically and electrically configured to accommodate both the SOIC-8 (e.g., MLX90380LDC) and TSSOP-16 (e.g., MLX90380LGO) package variants of the MLX90380. It includes separate footprint pads and jumper options to route VDD3V3/VDD5V appropriately for each package type, and maintains correct grounding and decoupling topologies per Melexis' recommended application diagrams for both configurations. The EVB90380 does not auto-detect package type - user must configure jumpers per installed device.

How do I configure the EVB90380 for 5 V operation with the MLX90380?

To configure the EVB90380 for 5 V operation, apply 5 V to the VDD5V input terminal and ensure the VDD3V3 supply line is left floating (unconnected), as required by the MLX90380 datasheet. On the board, this is achieved by removing any jumper linking VDD3V3 to ground or supply, and confirming no external 3.3 V source is attached. The EVB90380 includes dedicated 5 V decoupling (C1, C2, C3) and supports the MLX90380's 4.5–5.5 V operating range. This configuration applies identically whether using the SOIC-8 or TSSOP-16 variant of the MLX90380.

Can the EVB90380 be used to program the MLX90380's magnetic axis or sensitivity settings?

No, the EVB90380 does not include programming circuitry or firmware for configuring the MLX90380's magnetic axis, sensitivity range, or bandwidth. Programming is performed at factory level via the MLX90380's TEST pin and supply voltage ramping sequence (PTC method), as defined in the datasheet. The EVB90380 provides physical access to the TEST pin and supports proper grounding of unused pins for EMC, but it lacks the voltage sequencing, timing control, or host interface needed for field reprogramming. Users must rely on pre-programmed MLX90380 parts ordered with specific option codes (e.g., BAA-000, BAB-025).

What mechanical and thermal specifications apply to the EVB90380 board itself?

The EVB90380 is a rigid FR-4 PCB with standard 1.6 mm thickness, designed for benchtop evaluation only - it has no IP rating, no conformal coating, and no specified mechanical mounting provisions beyond standard 2.54 mm header footprints. Its thermal performance follows the MLX90380's validated -40°C to +150°C junction temperature range; however, sustained operation above 85°C ambient requires forced airflow or thermal derating due to lack of heatsinking. The board's copper pour and layout are optimized for signal integrity and low-noise analog output delivery, not for continuous high-power operation.