Melexis Technologies NV MLX90371GVS-BCC-108-RX

Overview

MLX90371GVS-BCC-108-RX from Melexis is a Triaxis® monolithic position processor IC that senses BX, BY, and BZ magnetic field components to deliver absolute rotary position output with 12-bit resolution, ±10° angular accuracy over -40°C to +160°C, and stray-field immunity in Rotary Stray-Field Immune Mode. It serves as a contactless replacement for potentiometers in automotive throttle and pedal sensing.

For engineers reviewing the MLX90371GVS-BCC-108-RX datasheet, pinout, applications, or equivalent options, this device offers programmable analog/PWM output, ISO26262 ASIL-B safety compliance, on-chip DSP processing, and DMP-4 package integration for space-constrained PCB layouts.

Technical Context

The MLX90371GVS-BCC-108-RX implements a Triaxis® Hall sensor front-end with integrated IMC, ADC, and digital signal processor (DSP) executing real-time angle computation using ratiometric or PWM transfer functions. Its architecture supports user-programmable piecewise-linear (up to 32 segments) or multi-point (4/8-point) calibration for precise angular mapping.

It operates in Rotary Stray-Field Immune Mode (BCC-108), requiring specific magnet configurations with in-plane field gradients below 0.5 mT/mm and Z-axis flux density ≥100 mT. The device features built-in reverse-polarity and overvoltage protection, thermal compensation, and diagnostic monitoring including broken-wire detection.

Key Specifications

Pinout & Package

DMP-4 (Dual Mold Package, PCB-less) with 4-pin leadframe, STD4 2.54 mm pitch trim-and-form leads, face-down tape-and-reel packaging (RX). No external decoupling capacitor required due to integrated VDEC functionality.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar absolute position sensing applications.

Compared with MLX90371GVS-BCC-108-RX, the MLX90372 variant improves resolution and accuracy while maintaining drop-in compatibility, whereas the AS5055A requires redesign of signal chain and firmware but offers greater configurability and lower BOM count in digital-centric architectures.

Availability

MLX90371GVS-BCC-108-RX is available at Aetrix Electronics and suitable for automotive throttle position sensing, pedal position sensing, and steering angle measurement requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MLX90371GVS-BCC-108-RX 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 magnetic sensing, infrared thermometry, and automotive ICs, with global design centers and AEC-Q100 qualified manufacturing.

The MLX90371 product line delivers Triaxis® position processors optimized for contactless absolute angle and linear position sensing in harsh automotive environments, targeting ASIL-B functional safety compliance and stray-field resilience.

FAQ

What is the operating temperature range of the MLX90371GVS-BCC-108-RX?

The MLX90371GVS-BCC-108-RX is specified for continuous operation from -40°C to +160°C, meeting AEC-Q100 Grade 0 requirements. This range covers under-hood automotive locations such as throttle bodies, brake pedals, and suspension linkages where ambient heat and self-heating must be accommodated without performance degradation. The device maintains its ±10° thermal accuracy specification across this full range.

Does the MLX90371GVS-BCC-108-RX require an external decoupling capacitor?

No, the MLX90371GVS-BCC-108-RX does not require an external decoupling capacitor because it integrates an on-chip regulator with dedicated VDEC functionality. The DMP-4 package version uses internal capacitance structures, eliminating the need for discrete 100 nF or 10 nF capacitors typically required by SOIC-8 or TSSOP-16 variants. This simplifies layout and reduces bill-of-materials count.

How is stray-field immunity implemented in the MLX90371GVS-BCC-108-RX?

The MLX90371GVS-BCC-108-RX achieves stray-field immunity through its BCC-108 configuration, which applies differential signal processing across the Triaxis® sensor elements to reject common-mode magnetic interference. This mode is validated per ISO11452-8 for rejection of orthogonal fields up to ±10 mT and requires specific magnet placement with controlled in-plane gradients (<0.5 mT/mm) and minimum Z-axis flux (≥100 mT).

Can the MLX90371GVS-BCC-108-RX output both analog and PWM signals simultaneously?

No, the MLX90371GVS-BCC-108-RX supports either ratiometric analog or PWM output-not both simultaneously. The output mode is selected during programming via NVRAM configuration. Analog mode provides 0–100% VDD output with 12-bit resolution and 200 V/ms slew rate; PWM mode delivers 150–2000 Hz frequency with programmable duty cycle and <11 μs edge timing.

What safety certification does the MLX90371GVS-BCC-108-RX hold?

The MLX90371GVS-BCC-108-RX is certified as an ISO26262 ASIL-B Safety Element out-of-Context (SEooC), meaning its internal diagnostics-including watchdog timers, memory ECC, and signal path monitoring-have been independently assessed to achieve ≥90% single-point fault coverage and support integration into ASIL-B automotive systems without requiring additional hardware redundancy.