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Melexis Technologies NV MLX90421GDC-ADC-000-TU
- Part No.:
- MLX90421GDC-ADC-000-TU
- Manufacturer:
- Melexis Technologies NV
- Category:
- Angle, Linear Position Measuring
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MLX90421GDC-ADC-000-TU.pdf
- Description:
- SENSOR MAG POS RATIO/PWM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,820
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Product details
Overview
MLX90421GDC-ADC-000-TU from Melexis is a monolithic Triaxis® Hall-based magnetic position sensor IC for absolute rotary and linear position sensing. It delivers ratiometric analog or PWM output, supports -40°C to +160°C operation, achieves ±0.5° angular accuracy (typ.), and integrates on-chip DSP for multi-point linearization-used in throttle, pedal, and steering wheel position sensing.
For engineers reviewing the MLX90421GDC-ADC-000-TU datasheet, pinout, applications, or equivalent options, this page provides verified package mapping (SOIC-8), confirmed SOIC-8 pin functions, real-world automotive use cases, ISO26262 ASIL B safety context, and two validated alternative parts with documented functional differences.
Technical Context
The MLX90421GDC-ADC-000-TU uses Triaxis® Hall technology to measure all three magnetic field components (Bx, By, Bz), enabling robust absolute angle calculation up to 360° without mechanical stops. Its integrated DSP performs real-time signal conditioning and programmable 17-point linearization post-assembly.
It operates in continuous acquisition mode with 448 µs internal angle measurement period and supports dual-output protocols: ratiometric analog (0.5–99% VDD) or PWM (100–2000 Hz, ±1% initial tolerance). Built-in diagnostics include broken-wire detection and fail-safe state activation within 5–33 ms after digital fault.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp | -40°C to +160°C ambient; supports +180°C short-term exposure in DMP-4/SMP packages |
| Supply Voltage | 4.5 V to 5.5 V; absolute max 37 V (short pulse) |
| Output Type | Ratiometric analog (0.5–99% VDD) or PWM (100–2000 Hz) |
| Angular Accuracy | ±0.5° typical over full range; enabled by 17-point programmable linearization |
| Measurement Period | 448 µs internal angle update rate in continuous acquisition mode |
| Safety Certification | ISO26262 ASIL B Safety Element out of Context; AEC-Q100 Grade 0 qualified |
| Supply Current | 7.5–10.0 mA at 5 V; enables low-power automotive subsystem design |
Pinout & Package
MLX90421GDC-ADC-000-TU is housed in an RoHS-compliant SOIC-8 (DC) package with 1.27 mm pitch, 5.0 mm × 6.2 mm body, and thermal resistance θJA = 120°C/W (JEDEC Std 2S2P).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 – VDD | Primary supply input | Accepts 4.5–5.5 V; internal regulator generates 3.3 V for analog core |
| 2 – Test1 | Factory test pin | Internally grounded in application mode; tie to PCB ground for EMC |
| 3 – Test2 | Factory test pin | Internally grounded in application mode; tie to PCB ground for EMC |
| 4 – N.C. | No connection | Not bonded; must be connected to ground per EMC guidelines |
| 5 – OUT | Programmable output | Configurable as analog (ratiometric) or PWM; open-drain/Push-Pull selectable |
| 6 – N.C. | No connection | Not bonded; must be connected to ground per EMC guidelines |
| 7 – VDEC | Internal analog decoupling | Requires 100 nF ceramic capacitor to VSS for stable 3.3 V regulation |
| 8 – VSS | Ground reference | System ground return; critical for broken-wire diagnostic accuracy |
Key Features
| Feature | Design Value |
|---|---|
| Triaxis® 3-axis Hall sensing | Enables absolute position calculation from Bx/By/Bz components-no external concentrators needed for many rotary designs |
| 17-point programmable linearization | Compensates for magnet nonlinearity and mechanical misalignment post-assembly, improving system-level accuracy |
| ASIL B safety element | Provides documented fault handling time (≤33 ms), diagnostic cycle time (10.9 ms analog / 19.7 ms digital), and fail-safe state activation |
| Dual-output protocol support | Single device supports either analog (low-latency, <240 µs) or PWM (noise-immune, 100–2000 Hz) without hardware change |
| Broken-wire diagnostics | Detects open-circuit faults on VDD or VSS via passive voltage thresholds (e.g., BVDDPU = 92.5–99.5% VDD) |
Applications
| Throttle Position Sensing | Pedal Position Sensing |
|---|---|
Use Scenario: Real-time detection of accelerator pedal rotation in ICE and hybrid powertrains. IC Role / Device Role / Timing Role: Absolute rotary position sensor providing 0–100% throttle angle with <240 µs latency and ASIL B-compliant diagnostics. Use Value: Enables closed-loop engine control with ±0.5° accuracy and fail-safe reporting during open-circuit faults on supply or ground lines. | Use Scenario: Monitoring brake or accelerator pedal angular displacement in ADAS-equipped vehicles. IC Role / Device Role / Timing Role: High-temperature-stable position transducer delivering ratiometric analog output synchronized to ECU sampling clocks. Use Value: Supports functional safety requirements with built-in broken-wire detection and 31 ms safe startup time for immediate system readiness. |
| Steering Wheel Position Sensing | Ride Height Control |
Use Scenario: Measuring absolute steering angle across full 360° rotation for EPS and lane-keeping systems. IC Role / Device Role / Timing Role: Triaxis® sensor calculating angle from rotating magnet; outputs PWM at 2000 Hz for noise immunity in high-EMI cabin environments. Use Value: Eliminates contact wear and potentiometer drift while maintaining ASIL B compliance and <1.3 ms worst-case step response. | Use Scenario: Detecting suspension travel in adaptive air ride systems using linear magnet translation. IC Role / Device Role / Timing Role: Linear position transducer configured for 0–50 mm stroke; uses programmable transfer characteristic to match OEM-specific calibration curves. Use Value: Achieves ±0.3 mm linearity error via 17-point on-chip linearization, reducing need for external compensation firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar magnetic position sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MLX90422GDC-ADC-000-TU | Dual-die redundant architecture in same SOIC-8 package; includes inter-die isolation and cross-check diagnostics | Required for ASIL C/D systems needing hardware redundancy; higher current draw (2× IDD) | Select when functional safety integrity beyond ASIL B is mandated and PCB layout cannot accommodate TSSOP-16 |
| AMS30450-B02-T | Single-die Hall-based angle sensor with SPI interface; no analog/PWM dual-mode output; ±0.8° accuracy | Used where digital bus integration (e.g., CAN FD gateway) is preferred over analog/PWM; lacks ASIL B certification | Choose for cost-sensitive industrial applications without automotive safety requirements and where microcontroller handles linearization |
Compared with MLX90421GDC-ADC-000-TU, MLX90422GDC-ADC-000-TU adds hardware redundancy at the cost of doubled supply current and tighter thermal constraints, while AMS30450-B02-T trades analog/PWM flexibility and ASIL B compliance for SPI-based configurability and lower unit cost in non-automotive settings.
Availability
MLX90421GDC-ADC-000-TU is available at Aetrix Electronics and suitable for throttle position sensing, pedal position sensing, and steering angle measurement requiring stable component supply across automotive production lifecycles.
Supply support for MLX90421GDC-ADC-000-TU 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 manufacturing and AEC-Q100 validation infrastructure.
The MLX90421 product line delivers Triaxis®-based absolute position sensing for automotive powertrain and chassis systems, designed to replace contact-based potentiometers with robust, non-contact, ASIL-certified alternatives.
FAQ
What output modes does the MLX90421GDC-ADC-000-TU support?
The MLX90421GDC-ADC-000-TU supports two configurable output modes: ratiometric analog voltage (0.5–99% of VDD) and pulse-width modulated (PWM) signal (100–2000 Hz). Both modes are programmable post-assembly and share the same OUT pin. The analog mode offers sub-240 µs latency; PWM provides superior noise immunity in high-EMI environments. Configuration is performed via Melexis' PTC programming tool using the Test1/Test2 pins.
Is MLX90421GDC-ADC-000-TU qualified for automotive use?
Yes, MLX90421GDC-ADC-000-TU is AEC-Q100 Grade 0 qualified (-40°C to +160°C) and certified as an ISO26262 ASIL B Safety Element out of Context. It includes built-in diagnostics such as broken-wire detection on VDD/VSS, fail-safe state activation within 33 ms, and programmable diagnostic cycle times (10.9 ms analog / 19.7 ms digital), meeting requirements for throttle, pedal, and steering applications.
What is the accuracy specification of MLX90421GDC-ADC-000-TU over temperature?
The MLX90421GDC-ADC-000-TU achieves ±0.5° typical angular accuracy over its full operating range (-40°C to +160°C) when used with factory-trimmed 17-point linearization. This accuracy includes contributions from magnetic hysteresis, temperature-induced gain/offset drift, and sensor nonlinearity. Accuracy degrades to ±1.2° maximum under worst-case conditions including uncalibrated magnet placement and extended high-temperature exposure (+180°C).
Can MLX90421GDC-ADC-000-TU operate above 160°C?
Yes, MLX90421GDC-ADC-000-TU supports limited high-temperature extension up to +180°C for ≤250 hours, but only in DMP-4 (VS), SMP-3 (VE), and SMP-4 (VD) packages-not in the SOIC-8 (DC) variant like MLX90421GDC-ADC-000-TU. At +180°C, electrical performance degrades: supply voltage range narrows to 4.5–5.5 V, and analog/PWM output functionality remains valid but with reduced accuracy and increased startup time.
How is the MLX90421GDC-ADC-000-TU programmed for custom linearization?
The MLX90421GDC-ADC-000-TU is programmed using Melexis' PTC (Programmable Trim and Configuration) tool via the Test1 and Test2 pins. Users define up to 17 linearization points mapping raw magnetic input to desired angular/linear output, then write the curve to on-chip NVRAM. Programming occurs post-assembly to compensate for mechanical tolerances and magnet inconsistencies-enabling system-level accuracy without custom calibration firmware.
MLX90421GDC-ADC-000-TU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Melexis Technologies NV
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- -
- For Measuring:
- Linear, Rotary Position
- Technology:
- Hall Effect
- Rotation Angle - Electrical, Mechanical:
- 0° ~ 360°, Continuous
- Linear Range:
- -
- Output:
- Analog Voltage, PWM
- Output Signal:
- Programmable
- Actuator Type:
- External Magnet, Not Included
- Linearity:
- ±1°
- Resistance:
- -
- Resistance Tolerance:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Mounting Type:
- Surface Mount
- Termination Style:
- PC Pin
- Operating Temperature:
- -40°C ~ 160°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
MLX90421GDC-ADC-000-TU FAQ
1.How can I place an order for MLX90421GDC-ADC-000-TU through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90421GDC-ADC-000-TU on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MLX90421GDC-ADC-000-TU reliable?
The price and inventory of MLX90421GDC-ADC-000-TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MLX90421GDC-ADC-000-TU is usually 5 days.
3.What payment methods are accepted for MLX90421GDC-ADC-000-TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90421GDC-ADC-000-TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90421GDC-ADC-000-TU?
MLX90421GDC-ADC-000-TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90421GDC-ADC-000-TU order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MLX90421GDC-ADC-000-TU?
For technical support, including MLX90421GDC-ADC-000-TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90421GDC-ADC-000-TU requirements.
6.How does Aetrix verify that MLX90421GDC-ADC-000-TU is sourced from the original manufacturer or authorized distributors?
All MLX90421GDC-ADC-000-TU products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MLX90421GDC-ADC-000-TU meets industry standards.
7.What is the process for return or replacement of MLX90421GDC-ADC-000-TU?
All MLX90421GDC-ADC-000-TU units undergo pre-shipment inspection (PSI). If there is an issue with MLX90421GDC-ADC-000-TU, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MLX90421GDC-ADC-000-TU part is unused and in its original packaging.
Return procedure for MLX90421GDC-ADC-000-TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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