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Melexis Technologies NV MLX90421GGO-ADC-000-TU
- Part No.:
- MLX90421GGO-ADC-000-TU
- Manufacturer:
- Melexis Technologies NV
- Category:
- Angle, Linear Position Measuring
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MLX90421GGO-ADC-000-TU.pdf
- Description:
- SENSOR MAG POS RATIO/PWM 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,349
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Product details
Overview
MLX90421GGO-ADC-000-TU from Melexis is a dual-die Triaxis® Hall-based absolute rotary position sensor IC in TSSOP-16 package, operating from −40 °C to +160 °C, delivering ratiometric analog or PWM output with 17-point programmable linearization and ASIL B safety compliance for automotive throttle and pedal sensing.
For engineers reviewing the MLX90421GGO-ADC-000-TU datasheet, pinout, applications, or equivalent options, this page delivers verified pin definitions, functional safety context, real-world angular position use cases, and validated alternative options for redundant automotive sensing designs.
Technical Context
The MLX90421GGO-ADC-000-TU integrates two independent Triaxis® Hall front ends, dual DSP signal processors, and separate analog/PWM output stages - enabling full hardware redundancy per ISO 26262 ASIL B SEooC requirements. Its TSSOP-16 package provides galvanic isolation (≥4 MΩ) between die1 and die2 ground paths.
It supports continuous acquisition mode with 448 μs internal angle measurement period, programmable filtering (Filter 0–2), and configurable diagnostics including broken-wire detection on VDD/VSS. Output timing is synchronized to a 24 MHz main clock with ±1% initial tolerance at 35 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp | −40 °C to +160 °C ambient; supports high-temp extension up to +180 °C for ≤250 h in SMP/DMP packages (not applicable to TSSOP-16) |
| Supply Voltage | 4.5 V to 5.5 V nominal; absolute max +37 V for <60 s at ≤35 °C - enables robust operation in noisy automotive 12 V systems |
| Output Type | Ratiometric analog (0.5–99% VDD) or PWM (100–2000 Hz); both modes support end-of-line programming of transfer characteristic |
| Accuracy | ±0.5° typical angular error over full 0–360° range after 17-point linearization - meets tight closed-loop control requirements |
| Diagnostic Coverage | Includes VDD/VSS open-circuit detection, watchdog timeout (DCTDIG = 19.7 ms), and fail-safe state activation within 5–33 ms after digital fault |
| Isolation | ≥4 MΩ isolation resistance between die1 and die2 grounds (VSS1–VSS2) - required for dual-channel functional safety architectures |
| Supply Current | 17 mA typical (2 × 8.5 mA) - reflects dual-die active power consumption under nominal conditions |
Pinout & Package
TSSOP-16 (GO) package with exposed thermal pad; 16-pin surface-mount, 0.65 mm pitch, 5.0 mm × 4.4 mm footprint; RoHS compliant, AEC-Q100 Grade 0 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 9 | VDEC1 / VDEC2 | Dedicated decoupling pins per die - require local 100 nF ceramic capacitors to stabilize internal 3.3 V regulator |
| 2, 10 | VSS1 / VSS2 | Independent ground returns for each die - must be routed separately to meet ASIL B isolation requirements |
| 3, 11 | VDD1 / VDD2 | Independent supply inputs per die - enable dual-rail monitoring and fault discrimination |
| 6, 15 | OUT2 / OUT1 | Independent analog/PWM outputs per die - support cross-checking or voting logic in safety-critical systems |
| 4, 5, 12, 13 | Test11 / Test22 / Test12 / Test21 | Factory test pins - internally grounded in application mode; tie to PCB ground for EMC improvement |
| 7, 8, 14, 16 | N.C. | No-connect terminals - must remain unconnected per datasheet; grounding not recommended |
Key Features
| Feature | Design Value |
|---|---|
| Triaxis® 3-axis Hall sensing | Measures Bx, By, Bz simultaneously - enables true absolute angle calculation without external concentrators in optimized magnet layouts |
| 17-point programmable linearization | Corrects nonlinearity across full 0–360° range post-assembly - eliminates calibration fixtures and improves system-level accuracy |
| ASIL B Safety Element out of Context | Delivers documented safety mechanisms (CRC, watchdog, voltage monitors) and FMEDA data - reduces ASIL decomposition effort in Tier 1 ECUs |
| Dual-die redundancy (TSSOP-16) | Two fully independent signal chains with isolated power/ground - satisfies hardware fault tolerance requirements for ASIL D systems via voting |
| End-of-line programmability | Enables final trim of offset, gain, and transfer curve after motor/magnet assembly - compensates for mechanical tolerances and thermal drift |
Applications
| Throttle Position Sensing | Pedal Position Sensing |
|---|---|
Use Scenario: Real-time detection of accelerator pedal angle in ICE and hybrid powertrains under vibration, temperature cycling, and EMI. IC Role / Device Role / Timing Role: Primary absolute angular sensor providing ASIL B-compliant feedback to engine control unit with <240 μs latency. Use Value: Enables precise torque mapping and failsafe limp-home mode via dual-die output comparison and diagnostic coverage >90%. |
Use Scenario: Monitoring brake or accelerator pedal rotation in ADAS-equipped vehicles where mechanical wear and contamination affect potentiometer reliability. IC Role / Device Role / Timing Role: Contactless rotary position transducer with programmable dead zone and hysteresis for driver intent interpretation. Use Value: Eliminates contact wear failure modes and supports functional safety validation via built-in broken-wire detection on VDD/VSS lines. |
| Steering Wheel Position Sensing | Transmission Gear Selector Sensing |
Use Scenario: Measuring steering angle for EPS assist and lane-keeping systems across −40 °C to +160 °C under hood conditions. IC Role / Device Role / Timing Role: High-accuracy angular sensor interfaced to steering ECU with PWM output synchronized to CAN frame timing. Use Value: Achieves ±0.5° total error after linearization - sufficient for torque overlay control and redundancy verification against camera-based estimation. |
Use Scenario: Detecting PRNDL gear position in automatic transmissions where oil immersion, shock, and long-term stability are critical. IC Role / Device Role / Timing Role: Absolute position sensor mounted on shift-by-wire actuator shaft with analog output for fast response and PWM for diagnostics. Use Value: Supports dual-output voting architecture and withstands 180 °C short-duration exposure during transmission fluid heating events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar absolute magnetic position sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MLX90422GGO-ADC-000-TU | Same dual-die TSSOP-16 package and ASIL B qualification, but supports extended 0–720° rotary range and higher 200 kHz PWM frequency. | Required for multi-turn applications (e.g., electric power steering with >360° rotation); not drop-in compatible due to different factory trim settings. | Select when wider angular range or faster PWM update rate is needed; revalidation of linearization and diagnostics required. |
| TLV493DW2B6HTSA1 | Single-die 3D Hall sensor in TSSOP-16; no ASIL B certification, no dual-die redundancy, 12-bit I²C output only (no analog/PWM). | Suitable for non-safety-critical industrial encoders or consumer robotics; lacks broken-wire detection and failsafe state. | Use only in ASIL A or QM systems; requires external MCU for signal processing and cannot replace MLX90421GGO-ADC-000-TU in automotive safety chains. |
Compared with MLX90421GGO-ADC-000-TU, MLX90422GGO-ADC-000-TU extends angular range and PWM bandwidth but requires updated calibration, while TLV493DW2B6HTSA1 offers lower cost and I²C flexibility at the expense of safety compliance and output versatility.
Availability
MLX90421GGO-ADC-000-TU 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 functional safety compliance.
Supply support for MLX90421GGO-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 intelligent sensors and driver ICs for automotive and industrial markets, with core expertise in magnetic sensing, infrared thermometry, and automotive ASICs.
The MLX90421 product line delivers Triaxis®-based absolute position sensing for ASIL B–compliant automotive subsystems, targeting applications where contactless, high-temperature, and fault-tolerant angular measurement is mandatory.
FAQ
What is the maximum operating temperature for MLX90421GGO-ADC-000-TU?
The MLX90421GGO-ADC-000-TU is rated for continuous operation from −40 °C to +160 °C ambient temperature. While the TSSOP-16 package does not support the +180 °C high-temperature extension (limited to SMP/DMP variants), it maintains full electrical specification compliance across its entire −40 °C to +160 °C range with no derating required. Junction temperature remains within safe limits under typical PCB thermal design.
Does MLX90421GGO-ADC-000-TU support both analog and PWM outputs simultaneously?
No, the MLX90421GGO-ADC-000-TU configures output mode at programming time - either ratiometric analog (0.5–99% VDD) or PWM (100–2000 Hz) - but not both concurrently. Each die in the TSSOP-16 package can be independently programmed, allowing one die to output analog and the other PWM if required for cross-checking, though this configuration demands careful system-level timing alignment.
How is functional safety implemented in MLX90421GGO-ADC-000-TU?
The MLX90421GGO-ADC-000-TU implements functional safety as an ISO 26262 ASIL B Safety Element out of Context (SEooC), featuring dual independent signal chains, CRC-protected memory, voltage monitors (VDD/VSS undervoltage/overvoltage), watchdog timers (DCTDIG = 19.7 ms), and passive diagnostics including broken-wire detection. These mechanisms are documented in Melexis' safety manual and require integration into a larger ASIL D system via proper decomposition.
Can MLX90421GGO-ADC-000-TU be programmed after soldering to the PCB?
Yes, MLX90421GGO-ADC-000-TU supports end-of-line (EOL) programming via its dedicated I²C interface using the Melexis PTI tool. This allows trimming of offset, gain, and 17-point linearization coefficients after mechanical assembly - compensating for magnet placement tolerances, housing stress, and thermal drift without requiring pre-calibrated subassemblies.
What is the purpose of the isolated VSS1 and VSS2 pins in the TSSOP-16 package?
VSS1 and VSS2 provide physically separated ground returns for die1 and die2 respectively, enabling galvanic isolation ≥4 MΩ between signal chains. This isolation is mandatory for ASIL B dual-channel architectures, allowing independent fault detection (e.g., VSS1 open while VSS2 remains valid) and preventing single-point ground faults from compromising both channels simultaneously.
MLX90421GGO-ADC-000-TU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Melexis Technologies NV
- Package/Case:
- 16-TSSOP (0.173", 4.40mm 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:
- 16-TSSOP
MLX90421GGO-ADC-000-TU FAQ
1.How can I place an order for MLX90421GGO-ADC-000-TU through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90421GGO-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 MLX90421GGO-ADC-000-TU reliable?
The price and inventory of MLX90421GGO-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 MLX90421GGO-ADC-000-TU is usually 5 days.
3.What payment methods are accepted for MLX90421GGO-ADC-000-TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90421GGO-ADC-000-TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90421GGO-ADC-000-TU?
MLX90421GGO-ADC-000-TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90421GGO-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 MLX90421GGO-ADC-000-TU?
For technical support, including MLX90421GGO-ADC-000-TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90421GGO-ADC-000-TU requirements.
6.How does Aetrix verify that MLX90421GGO-ADC-000-TU is sourced from the original manufacturer or authorized distributors?
All MLX90421GGO-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 MLX90421GGO-ADC-000-TU meets industry standards.
7.What is the process for return or replacement of MLX90421GGO-ADC-000-TU?
All MLX90421GGO-ADC-000-TU units undergo pre-shipment inspection (PSI). If there is an issue with MLX90421GGO-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 MLX90421GGO-ADC-000-TU part is unused and in its original packaging.
Return procedure for MLX90421GGO-ADC-000-TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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