Melexis Technologies NV MLX90371GVS-BCC-203-RX

Overview

MLX90371GVS-BCC-203-RX from Melexis is a Triaxis® monolithic position processor IC that senses all three magnetic field components (BX, BY, BZ) to deliver absolute linear position output with 12-bit resolution and ±10-bit thermal accuracy. It operates from -40°C to +160°C, supports programmable PWM or ratiometric analog output, and implements stray-field immune linear mode per BCC-203 configuration for automotive pedal and throttle sensing.

For engineers reviewing the MLX90371GVS-BCC-203-RX datasheet, pinout, applications, or equivalent options, this device delivers ISO26262 ASIL-B safety element out-of-context compliance, programmable piecewise-linear transfer characteristics (up to 32 segments), and integrated diagnostics for functional safety-critical linear position sensing in harsh environments.

Technical Context

The MLX90371GVS-BCC-203-RX uses on-chip Triaxis® Hall sensor architecture with integrated IMC to resolve 3D magnetic vector components, enabling robust absolute linear position decoding without mechanical contact. Its DSP-based signal processing includes configurable FIR filtering (FIR1/FIR11/FIR1111), exponential moving average, and programmable clamping for noise immunity.

This variant implements Linear Stray-Field Immune Mode (BCC-203), requiring specific magnetic circuit design with controlled Z-axis field strength and in-plane gradient constraints. It features dual ground pins (VSS), single supply (VDD), and open-drain/push-pull configurable output stage supporting 150–2000 Hz PWM or 0–100% VDD analog output with 482 µs refresh rate and 462 µs latency.

Key Specifications

Pinout & Package

DMP-4 (Dual Mold Package, PCB-less) with 4 terminals: compact surface-mount footprint optimized for direct soldering onto flex or rigid PCBs; 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 linear position sensing applications.

Compared with MLX90371GVS-BCC-203-RX, MLX90372GVS-BCC-203-RX extends safety diagnostics and identity management without changing pinout or magnetic behavior, while TLE5012BE1000XUMA1 trades analog/PWM flexibility for higher speed and resolution via SPI-requiring redesign of interface and signal conditioning.

Availability

MLX90371GVS-BCC-203-RX is available at Aetrix Electronics and suitable for automotive pedal position sensing, throttle control systems, and ride height adjustment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MLX90371GVS-BCC-203-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 intelligent sensors and driver ICs for automotive and industrial applications, with core expertise in magnetic sensing, infrared thermometry, and automotive ASICs.

The MLX90371 product line delivers Triaxis® 3D Hall position processors designed specifically for contactless absolute rotary and linear position sensing in safety-critical automotive subsystems including powertrain, chassis, and ADAS.

FAQ

What is the magnetic field requirement for MLX90371GVS-BCC-203-RX in Linear Stray-Field Immune Mode?

The MLX90371GVS-BCC-203-RX requires a dominant Z-axis magnetic field (BZ ≥ 100 mT) with controlled in-plane gradient to ensure accurate linear position decoding. Per datasheet Section 8.3, stray-field immunity is achieved by limiting BX/BY to ≤25 mT while maintaining BZ within specified tolerance - this configuration rejects interference from adjacent actuators without compromising linearity.

Does MLX90371GVS-BCC-203-RX support both analog and PWM outputs simultaneously?

No, MLX90371GVS-BCC-203-RX supports either ratiometric analog or PWM output - selected during programming via NVRAM configuration. The output stage is not dual-mode; switching requires reprogramming the device using Melexis' PTM or EVK tools. Both modes share the same OUT pin and operate within identical electrical specs (e.g., 150–2000 Hz PWM frequency or 0–100% VDD analog span).

What package type does MLX90371GVS-BCC-203-RX use and what are its mounting implications?

MLX90371GVS-BCC-203-RX uses the DMP-4 (Dual Mold Package), a PCB-less surface-mount module with four solderable terminals. It mounts directly onto flex or rigid PCBs without leads or carrier substrate. The "RX" packing denotes face-down tape-and-reel orientation, and the package integrates decoupling capacitance - eliminating need for external VDEC capacitors and reducing board area by >50% versus SOIC-8 alternatives.

How is ISO26262 ASIL-B compliance implemented in MLX90371GVS-BCC-203-RX?

MLX90371GVS-BCC-203-RX is certified as an ASIL-B Safety Element out-of-Context (SEooC), meaning its internal safety mechanisms - including watchdog timers (IWD/ASW), memory ECC, diagnostic monitoring of supply/temperature/output, and fault-tolerant DSP execution - have been independently verified. System integrators can reuse its safety case in FMEDA without revalidating these mechanisms, provided the application constraints (e.g., BCC-203 magnetic configuration) are respected.

Can MLX90371GVS-BCC-203-RX be programmed in-system after soldering?

Yes, MLX90371GVS-BCC-203-RX supports in-system programming via its TEST pin using Melexis' proprietary PTM protocol. Full configuration - including output mode, transfer curve points, filter settings, and diagnostic thresholds - can be written to NVRAM post-mounting using standard UART or dedicated evaluation kits. No external programmer or socketing is required, enabling final calibration during end-of-line testing.