Melexis Technologies NV MLX90373KVS-ABA-308-RX

Overview

MLX90373KVS-ABA-308-RX from Melexis is a Triaxis® Hall-effect position processor IC for absolute linear and angular position sensing using 2-wire PSI5 v1.3/v2.1 output. It operates from −40°C to +125°C, delivers ±0.85° total angle drift (rotary mode), supports stray-field immunity up to 5 mT, and is AEC-Q100 Grade 0 qualified for automotive pedal and throttle position sensing.

For engineers reviewing the MLX90373KVS-ABA-308-RX datasheet, pinout, applications, or equivalent options, key selection criteria include its DMP-4 package with 4-pin 2-wire PSI5 interface, programmable piecewise-linear transfer characteristic (up to 32 points), ISO 26262 SEooC ASIL-C compliance, and magnetic field gradient resolution of 0.075–0.125 mT/mm in legacy mode.

Technical Context

The MLX90373KVS-ABA-308-RX implements Triaxis® technology to measure all three orthogonal magnetic field components (B_X, B_Y, B_Z) on a single die, enabling robust absolute position decoding without mechanical contact. Its on-chip DSP performs real-time angle calculation, filtering (FIR/EMA), and diagnostics including intelligent watchdog (20 ms timeout) and absolute watchdog (20 ms timeout).

This variant uses the -308 option code, indicating Legacy / Linear-Angular Position mode with STD4 2.54 mm lead form in DMP-4 packaging. It supports PSI5 cycle times of 300–500 µs, achieves worst-case step response of 1480–2125 µs, and features end-user programmable transfer characteristics (4/8/17/32-point PWL), sensor front-end gain, and diagnostic thresholds.

Key Specifications

Pinout & Package

DMP-4 is a dual-mold, PCB-less surface-mount package with 4 terminals and straight leads (STD4 2.54 mm pitch). It integrates no external decoupling capacitors and requires direct connection to ground plane for EMC compliance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MLX90373KVS-ABA-308-RX, the GO variant adds die-level redundancy for ASIL-D but increases size and power; the DC variant retains identical functionality in SOIC-8 but forfeits DMP-4's PCB-less integration and STD4 lead form for automated assembly.

Availability

MLX90373KVS-ABA-308-RX is available at Aetrix Electronics and suitable for automotive pedal position sensing, throttle control systems, and ride height adjustment requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.

Supply support for MLX90373KVS-ABA-308-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 design centers in Europe and Asia.

The MLX90373 product line delivers Triaxis®-based absolute position sensing for automotive powertrain, chassis, and body control, emphasizing stray-field immunity, PSI5 interoperability, and ASIL-C functional safety compliance.

FAQ

What is the operating voltage range for MLX90373KVS-ABA-308-RX during PSI5 communication?

The MLX90373KVS-ABA-308-RX operates from 4.1 V to 6 V during PSI5 communication. This range ensures compatibility with standard 5 V automotive supply rails while maintaining signal integrity across temperature extremes from −40°C to +125°C. The device includes undervoltage detection thresholds (3.70–4.10 V) and hysteresis to prevent erratic behavior during brown-out conditions.

How does the MLX90373KVS-ABA-308-RX achieve stray magnetic field immunity?

The MLX90373KVS-ABA-308-RX achieves stray-field immunity up to 5 mT (4 kA/m) by leveraging Triaxis® technology to measure all three magnetic field components and computing position from their spatial gradients rather than absolute field magnitude. This method inherently rejects uniform external fields, as confirmed per ISO 11452-8 testing. Its DMP-4 package further enhances immunity through optimized magnetic shielding geometry.

What package type and lead configuration does MLX90373KVS-ABA-308-RX use?

The MLX90373KVS-ABA-308-RX uses the DMP-4 (Dual Mould Package) - a PCB-less, 4-terminal surface-mount package with STD4 2.54 mm pitch straight leads. The "308" option code explicitly denotes this lead form, enabling automated placement and reflow soldering while minimizing board area and interconnect inductance.

Can MLX90373KVS-ABA-308-RX be programmed for custom transfer characteristics?

Yes, the MLX90373KVS-ABA-308-RX supports end-user programming of its output transfer characteristic using up to 32-point piecewise-linear (PWL) calibration. This is performed via PTC (Programming Through Connector) and allows compensation for mechanical nonlinearity in custom magnetic assemblies - critical for applications like fuel level or pedal position where geometry deviates from ideal arcs or lines.

What functional safety certification applies to MLX90373KVS-ABA-308-RX?

The MLX90373KVS-ABA-308-RX is certified to ISO 26262 SEooC ASIL-C as a Safety Element out of Context. It includes integrated safety mechanisms such as dual watchdog timers (IWD and AWD), CRC-protected memory, ECC for NVRAM, and configurable diagnostics - enabling system integrators to achieve ASIL-B or ASIL-C system-level compliance without additional hardware redundancy.