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Melexis Technologies NV MLX90380LDC-BAC-545-RE
- Part No.:
- MLX90380LDC-BAC-545-RE
- Manufacturer:
- Melexis Technologies NV
- Category:
- Angle, Linear Position Measuring
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MLX90380LDC-BAC-545-RE.pdf
- Description:
- TRIAXIS HI-SPEED RESOLVER FEAT.
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MLX90380LDC-BAC-545-RE from Melexis is a monolithic Triaxis® contactless rotary position sensor IC delivering true 360° sine/cosine analog outputs with 4 µs output refresh rate, 3.3 V/5 V dual-supply support, and operation from −40 °C to +150 °C. It resolves angular position using orthogonal magnetic field components (Z/Y axis) with ferrite magnet compatibility and 60 mT full-scale magnetic range for high-accuracy motor shaft sensing in harsh environments.
For engineers reviewing the MLX90380LDC-BAC-545-RE datasheet, pinout, applications, or equivalent options, this page provides verified functional context, SOIC-8 package mapping, magnetic axis configuration (Z/Y), sensitivity calibration (60 mT), and real-world design implications for BLDC motor control and field-oriented control systems.
Technical Context
The MLX90380LDC-BAC-545-RE implements Triaxis® Hall technology to simultaneously sense magnetic flux density parallel and orthogonal to the die surface. Its Z/Y intrinsic magnetic axis configuration assigns OUT1 to COS(Z) and OUT2 to SIN(Y), enabling end-of-shaft and through-shaft mounting with ratiometric analog outputs referenced to VDD.
This variant uses ferrite magnets (BAC prefix), operates at high bandwidth (5xx suffix), and delivers 60 mT full-scale range (suffix -545). Output update timing is fixed at 4 µs per field component, with tracking delay of 17.5 µs under high-bandwidth programming-critical for real-time angle computation in 25,000 rpm motor applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Refresh Rate | 4 µs - Enables real-time angle calculation at up to 250 kSPS for high-speed motor control loops. |
| Full-Scale Magnetic Range | 60 mT - Factory-programmed sensitivity optimized for ferrite magnets in Z/Y axis configuration. |
| Operating Supply | 3.3 V or 5 V - Dual-rail support allows direct interface with 3.3 V MCUs or legacy 5 V systems without level shifting. |
| Temperature Range | −40 °C to +150 °C - Qualified for under-hood automotive and industrial motor drive environments. |
| Magnetic Axis | Z/Y - OUT1 = COS(Z), OUT2 = SIN(Y); supports off-axis through-shaft configurations with 50% Bz/Bxy ratio. |
| Output Linearity | ±0.5% - Measured within 0.5 V–4.5 V (5 V supply), ensuring <1° angular error before ECU compensation. |
| Total Angular Error (uncorrected) | ±10° at 25 °C - Reduced to ±1° with dynamic offset/gain correction applied by host MCU. |
Pinout & Package
MLX90380LDC-BAC-545-RE is housed in an 8-pin SOIC-8 package (JEDEC MS-012AC) with exposed pad for thermal performance. Unused pins (NC) and TEST must be connected to ground for optimal EMC behavior. VDD3V3 and VDD5V are separate supply inputs; only one is powered per application.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VSS | Supply Ground | Primary ground reference for analog and digital circuitry; connects to system GND plane. |
| 2 NC | Not Connected | Internally unconnected; must be tied to GND per EMC guidelines. |
| 3 TEST | Test Pin | Factory test access; requires GND connection in final design to suppress noise coupling. |
| 4 NC | Not Connected | Internally unconnected; must be tied to GND per EMC guidelines. |
| 5 OUT2 | Analog Output SIN | Sine output for Y-axis (in Z/Y mode); ratiometric to VDD, 0–100% VDD swing. |
| 6 VDD5V | 5 V Supply Input | Active when using 5 V operation; VDD3V3 must float in this mode. |
| 7 VDD3V3 | 3.3 V Supply Input | Active when using 3.3 V operation; VDD5V must float in this mode. |
| 8 OUT1 | Analog Output COS | Cosine output for Z-axis (in Z/Y mode); ratiometric to VDD, 0–100% VDD swing. |
Key Features
| Feature | Design Value |
|---|---|
| Selectable Z/Y magnetic axis | Enables mechanical flexibility for through-shaft installations where Z-field dominates and Y-field provides quadrature phase-no magnet reorientation required. |
| Ferrite magnet optimization (BAC) | Factory-calibrated sensitivity temperature coefficient (TCS ≈ 2000 ppm/°C) compensates for ferrite's strong negative Br(T) drift across −40 °C to +150 °C. |
| High-bandwidth programming (5xx) | Reduces tracking delay to 17.5 µs and enables 25,000 rpm operation with <2° phase shift-critical for FOC current loop timing. |
| Ratiometric analog outputs | OUT1/OUT2 scale linearly with VDD, eliminating need for precision voltage references and simplifying ADC input range utilization. |
| Programmable via connector | EEPROM-based configuration (sensitivity, bandwidth, axis) performed during assembly or in-system-no external programmer required. |
Applications
| Brushless DC Motor Control | Field-Oriented Control (FOC) |
|---|---|
|
Use Scenario: Real-time rotor position feedback for commutation in traction inverters and power tools. IC Role / Device Role / Timing Role: Contactless resolver replacement delivering synchronized SIN/COS outputs at 4 µs update interval for precise 6-step or sinusoidal commutation. Use Value: Eliminates slip rings and brushes while maintaining ±1° accuracy after ECU compensation-enabling IP67-rated motor designs. |
Use Scenario: High-bandwidth angular measurement for d-q axis current regulation in PMSM drives. IC Role / Device Role / Timing Role: Primary angle source feeding arctan(OUT2/OUT1) computation in real-time MCU; low 17.5 µs tracking delay preserves control loop stability at 20 kHz PWM. Use Value: Enables >95% motor efficiency by minimizing torque ripple-validated at 25,000 rpm with ferrite magnet assemblies. |
| End-of-Shaft Position Sensing | Through-Shaft Rotary Encoder |
|
Use Scenario: Compact angular feedback on motor output shafts where axial space is constrained. IC Role / Device Role / Timing Role: Z/Y axis configuration aligns COS(Z) with shaft rotation axis and SIN(Y) with tangential field-maximizing signal amplitude with minimal air gap. Use Value: Achieves 12-bit effective resolution (0.087°) using standard 12-bit MCU ADCs without interpolation hardware. |
Use Scenario: Non-invasive shaft angle measurement in gearmotor housings or pump assemblies. IC Role / Device Role / Timing Role: Mounted radially around rotating shaft; Z/Y axis leverages radial (Z) and tangential (Y) field components for robust quadrature generation. Use Value: Supports 50 mm+ shaft diameters with <0.5 mm air gap tolerance-reducing mechanical alignment cost vs. optical encoders. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar contactless rotary position sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MLX90380LDC-BAB-545-RE | NdFeB magnet calibration (TCS ≈ 1100 ppm/°C); identical Z/Y axis, 60 mT range, and high-bandwidth programming. | Better suited for high-temperature stability with NdFeB magnets; lower TCS reduces residual angular drift above 100 °C. | Select BAB-545-RE when using NdFeB magnets and requiring tighter thermal angular drift (<±0.5° over −40 °C to +150 °C). |
| MLX90380LGO-BAC-545-RE | TSSOP-16 dual-die redundant architecture; same Z/Y axis, 60 mT range, and high-bandwidth programming. | Provides ASIL-D capable fault detection via cross-die comparison-required for automotive steering or brake actuators. | Select LGO-BAC-545-RE when functional safety compliance (ISO 26262) mandates hardware redundancy and diagnostic coverage. |
Compared with MLX90380LDC-BAC-545-RE, the BAB-545-RE variant improves thermal angular stability with NdFeB magnets, while the LGO-BAC-545-RE adds dual-die redundancy for safety-critical systems-neither offers pin compatibility, but both share identical magnetic configuration and signal timing.
Availability
MLX90380LDC-BAC-545-RE is available at Aetrix Electronics and suitable for brushless motor control, field-oriented control, and through-shaft rotary position sensing requiring stable component supply across automotive and industrial temperature ranges.
Supply support for MLX90380LDC-BAC-545-RE 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 leadership in magnetic position sensing and contactless current measurement.
The MLX90380 product line delivers Triaxis® Hall-based absolute rotary position sensing for high-reliability motor control, designed specifically for harsh-environment applications demanding extended temperature operation and magnetic field resilience.
FAQ
What magnetic axis configuration does MLX90380LDC-BAC-545-RE use?
MLX90380LDC-BAC-545-RE uses the Z/Y intrinsic magnetic axis configuration, where OUT1 carries the COS(Z) signal and OUT2 carries the SIN(Y) signal. This configuration is optimized for through-shaft applications with ferrite magnets and supports a 50% Bz/Bxy flux ratio as specified in the datasheet. The BAC-545 option code confirms Z/Y axis, ferrite magnet calibration, and 60 mT full-scale range.
How does the 4 µs output refresh rate impact motor control loop design?
The 4 µs output refresh rate of MLX90380LDC-BAC-545-RE means each analog output updates every 4 µs, enabling up to 250 kSPS sampling. This supports closed-loop FOC execution at 20 kHz PWM frequency with sub-microsecond angle latency-critical for minimizing torque ripple in high-speed BLDC motors operating up to 25,000 rpm. The fixed 4 µs period ensures deterministic timing for MCU-based arctan computation.
Can MLX90380LDC-BAC-545-RE operate from both 3.3 V and 5 V supplies simultaneously?
No, MLX90380LDC-BAC-545-RE cannot operate from both 3.3 V and 5 V supplies simultaneously. Pin 6 (VDD5V) and Pin 7 (VDD3V3) are separate supply inputs; only one must be powered while the other is left floating. The device detects supply voltage automatically and configures internal biasing accordingly. Simultaneous application risks undefined behavior and violates Absolute Maximum Ratings.
What is the significance of the "545" in MLX90380LDC-BAC-545-RE?
The "545" suffix in MLX90380LDC-BAC-545-RE decodes as follows: "5" indicates high-bandwidth programming mode (17.5 µs tracking delay), "4" selects 5 V operating supply voltage, and "5" sets 60 mT full-scale magnetic range. Combined with "BAC", it specifies ferrite magnet calibration, Z/Y magnetic axis, and reel packaging-fully defining the factory-programmed configuration of this MLX90380LDC-BAC-545-RE unit.
Does MLX90380LDC-BAC-545-RE require external EEPROM or calibration hardware?
No, MLX90380LDC-BAC-545-RE contains on-chip EEPROM and supports full programming-including sensitivity, bandwidth, magnetic axis, and TCS calibration-via its VDD pins using the Melexis PTC protocol. No external EEPROM or dedicated calibration hardware is needed; configuration is performed during board assembly or in-system using standard MCU GPIOs and timing-controlled VDD pulses as defined in the MLX90380 User Interface Description document.
MLX90380LDC-BAC-545-RE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Melexis Technologies NV
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- Triaxis®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- For Measuring:
- Rotary Position
- Technology:
- Hall Effect
- Rotation Angle - Electrical, Mechanical:
- 0° ~ 360°, Continuous
- Linear Range:
- -
- Output:
- Analog Voltage
- Output Signal:
- Cosine, Sine
- Actuator Type:
- External Magnet, Not Included
- Linearity:
- ±1.5%
- Resistance:
- -
- Resistance Tolerance:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Mounting Type:
- Surface Mount
- Termination Style:
- SMD (SMT) Tab
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
MLX90380LDC-BAC-545-RE FAQ
1.How can I place an order for MLX90380LDC-BAC-545-RE through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90380LDC-BAC-545-RE 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 MLX90380LDC-BAC-545-RE reliable?
The price and inventory of MLX90380LDC-BAC-545-RE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MLX90380LDC-BAC-545-RE is usually 5 days.
3.What payment methods are accepted for MLX90380LDC-BAC-545-RE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90380LDC-BAC-545-RE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90380LDC-BAC-545-RE?
MLX90380LDC-BAC-545-RE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90380LDC-BAC-545-RE 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 MLX90380LDC-BAC-545-RE?
For technical support, including MLX90380LDC-BAC-545-RE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90380LDC-BAC-545-RE requirements.
6.How does Aetrix verify that MLX90380LDC-BAC-545-RE is sourced from the original manufacturer or authorized distributors?
All MLX90380LDC-BAC-545-RE 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 MLX90380LDC-BAC-545-RE meets industry standards.
7.What is the process for return or replacement of MLX90380LDC-BAC-545-RE?
All MLX90380LDC-BAC-545-RE units undergo pre-shipment inspection (PSI). If there is an issue with MLX90380LDC-BAC-545-RE, 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 MLX90380LDC-BAC-545-RE part is unused and in its original packaging.
Return procedure for MLX90380LDC-BAC-545-RE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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