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Melexis Technologies NV MLX90291LDC-BCA-000-TU
- Part No.:
- MLX90291LDC-BCA-000-TU
- Manufacturer:
- Melexis Technologies NV
- Category:
- Linear, Compass (ICs)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MLX90291LDC-BCA-000-TU.pdf
- Description:
- SENSOR HALL EFFECT PWM 8SOIC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MLX90291LDC-BCA-000-TU from Melexis is a monolithic programmable linear Hall effect sensor IC delivering a 12-bit, 125 Hz PWM output proportional to magnetic flux density (±15 mT to ±400 mT), configurable as a contactless switch with programmable threshold and hysteresis, and designed for rotary/linear position sensing in automotive throttle and pedal modules.
For engineers reviewing the MLX90291LDC-BCA-000-TU datasheet, pinout, applications, or equivalent options, key selection criteria include its SOIC-8 package, programmable offset/gain/temperature compensation via PTC, low-jitter PWM output, and diagnostic-ready open-drain or push-pull output drive configuration.
Technical Context
The MLX90291LDC-BCA-000-TU integrates a Hall plate, 12-bit ADC, digital signal processing block, EEPROM-based configuration storage, and PWM logic - all operating from a single 5 V supply. Its analog front-end includes programmable preamplifier gain (15×–193×), 2nd-order temperature compensation (TC1ST/TC2ND), and offset trimming (XA/YA) to stabilize output across –40°C to +125°C.
Digital functionality includes 125 Hz PWM generation with 0.0125% DC resolution, clamping (1–99% DC), filter bandwidth tuning (4–557 Hz via FILTCODE), and fault detection (EEPROM parity fail, broken VDD/VSS). All programming occurs through the 3-wire PTC interface (VDD, VSS, OUT) without requiring dedicated programming pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | 12-bit PWM at 125 Hz; supports both open-drain and push-pull drive modes |
| Magnetic Range | ±15 mT to ±400 mT; enables high-sensitivity linear position or robust switch-mode operation |
| Supply Voltage | 4.5 V to 5.5 V; compatible with standard 5 V automotive and industrial rails |
| Operating Temp | –40°C to +125°C; qualified for under-hood and motor-control environments |
| PWM Resolution | 0.0125% duty cycle; provides 12-bit effective linearity over full magnetic range |
| Programmability | Full PTC via VDD/VSS/OUT; no external programmer needed for offset, gain, clamping, filtering, or temperature coefficients |
| Jitter Performance | ±2 LSB PWM jitter; ensures stable timing-critical feedback in closed-loop systems |
Pinout & Package
MLX90291LDC-BCA-000-TU uses an 8-pin SOIC package (5.84 mm × 4.80 mm × 1.55 mm), RoHS-compliant and lead-free, with Hall plate centered 0.6 mm below package centerline for precise magnetic alignment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Power supply input | 5 V nominal supply; includes reverse polarity protection and overvoltage detection (7.5–8.5 V) |
| 2 - VSS | Ground reference | System ground return; internal ESD protection and fault detection on break |
| 3 - TEST4 | Factory calibration terminal | Internally grounded in application; connect to VSS for optimal EMC |
| 4 - OUT | Configurable output signal | Programmable PWM or switch output; supports open-drain or push-pull drive with current limiting |
| 5 - TEST5 | Factory calibration terminal | Internally grounded in application; connect to VSS for optimal EMC |
| 6 - TEST3 | Factory calibration terminal | Internally grounded in application; connect to VSS for optimal EMC |
| 7 - TEST2 | Factory calibration terminal | Internally grounded in application; connect to VSS for optimal EMC |
| 8 - TEST1 | Factory calibration terminal | Internally grounded in application; connect to VSS for optimal EMC |
Key Features
| Feature | Design Value |
|---|---|
| PTC Programming | Full device configuration (gain, offset, clamping, filtering, TC) via standard VDD/VSS/OUT lines - no extra pins or hardware required |
| Temperature Compensation | Independent 1st- and 2nd-order sensitivity drift correction (TC1ST/TC2ND) plus 1st-order offset drift (OFFDRIFT) for <±0.1 mT thermal offset shift |
| Diagnostic Output | Open-drain or push-pull output with built-in short-circuit current limiting (4–20 mA) and fault reporting (e.g., EEPROM parity fail = 4 V pull-up) |
| Filter Tuning | 8-step digital low-pass filter (FILTCODE) adjusts cutoff from 4 Hz to 557 Hz - balances response speed vs. noise rejection per application need |
| Clamp Control | 7 programmable clamp levels (1–99% DC) prevent saturation in high-field environments while preserving resolution at low fields |
Applications
| Rotary Position Sensing | Linear Position Sensing |
|---|---|
Use Scenario: Monitoring throttle valve angle in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Linear Hall sensor converting angular magnet displacement into proportional 125 Hz PWM signal for ECU interpretation. Use Value: Eliminates mechanical wear and potentiometer drift; maintains ±0.5° accuracy over lifetime and temperature due to on-chip TC compensation. | Use Scenario: Measuring suspension travel or brake pedal stroke in ADAS-enabled vehicles. IC Role / Device Role / Timing Role: Contactless linear displacement transducer delivering ratiometric PWM output synchronized to vehicle clock domain. Use Value: Immune to dust, moisture, and vibration; achieves <1% full-scale error across –40°C to +125°C without external calibration. |
| Contactless Switching | Motor Commutation Feedback |
Use Scenario: Gear position detection in automatic transmission control units. IC Role / Device Role / Timing Role: Programmable magnetic switch with adjustable threshold/hysteresis (XA/YA) and fail-safe diagnostic output. Use Value: Replaces reed switches and microswitches; supports ASIL-B functional safety via built-in fault detection (broken VDD/VSS, EEPROM CRC fail). | Use Scenario: Rotor position feedback for BLDC motor drives in HVAC blowers or power steering assist. IC Role / Device Role / Timing Role: High-speed Hall sensor providing commutation timing edges with <2 µs jitter and 125 Hz PWM-compatible update rate. Use Value: Enables smooth torque delivery and reduced acoustic noise; programmable slope (OUTSLOPE) controls edge slew rate to minimize EMI. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable Hall sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MLX90363KDC-ABA-000-TU | Triaxis® architecture; SPI interface; 16-bit output; higher cost; requires external MCU for programming | Supports 3D field measurement and complex angle calculation; not drop-in for single-axis PWM use cases | Select when multi-axis sensing or digital bus integration is required; avoid for simple 125 Hz PWM replacement |
| Allegro A1324LLHLT-T | Analog ratiometric output (not PWM); fixed gain (5 mV/G); no EEPROM or temperature compensation | Limited to ambient-temperature-stable analog interfaces; lacks diagnostics, programmability, and field-range flexibility | Select only for cost-sensitive, non-automotive applications where 125 Hz PWM and full TC are unnecessary |
Compared with MLX90291LDC-BCA-000-TU, the MLX90363 offers superior angular resolution but demands SPI infrastructure and adds BOM complexity, while the A1324 provides basic analog output at lower cost but forfeits programmability, diagnostics, and thermal stability - making MLX90291LDC-BCA-000-TU optimal for robust, self-contained PWM position sensing.
Availability
MLX90291LDC-BCA-000-TU is available at Aetrix Electronics and suitable for automotive throttle control, industrial linear actuators, and contactless switch replacements requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned performance.
Supply support for MLX90291LDC-BCA-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, industrial, and medical markets, with ISO/TS 16949 and ISO 14001 certification.
The MLX90291 belongs to Melexis' programmable Hall sensor product line, engineered for high-accuracy, contactless position and proximity sensing in harsh environments where reliability, programmability, and diagnostic capability are critical.
FAQ
What is the primary output format of the MLX90291LDC-BCA-000-TU?
The MLX90291LDC-BCA-000-TU delivers a 12-bit, 125 Hz PWM output signal proportional to applied magnetic flux density. It can also be configured as a digital switch with programmable threshold and hysteresis. The output driver supports both open-drain and push-pull modes, selectable via the OUTMODE bit in EEPROM. This dual-mode capability makes MLX90291LDC-BCA-000-TU suitable for both precision analog-equivalent feedback and robust digital switching applications.
How is the MLX90291LDC-BCA-000-TU programmed without dedicated programming pins?
The MLX90291LDC-BCA-000-TU uses Programming Through Connector (PTC), enabling full configuration - including gain (ROUGHGAIN/FINEGAIN), offset (XA/YA), clamping (CLAMP), filtering (FILTCODE), and temperature coefficients (TC1ST/TC2ND) - using only the VDD, VSS, and OUT pins. No additional programming hardware or pins are required. MLX90291LDC-BCA-000-TU enters programming mode when a specific voltage sequence (6.7–7.7 V on VDD while holding OUT high) is applied, allowing field updates and calibration without board redesign.
Does the MLX90291LDC-BCA-000-TU support functional safety requirements?
Yes, the MLX90291LDC-BCA-000-TU includes multiple built-in diagnostic features aligned with ASIL-B requirements: EEPROM parity/CRC checking, broken VDD/VSS detection, output short-circuit current limiting, and fault-state output signaling (e.g., 4 V diagnostic level on OUT during EEPROM failure). These capabilities enable system-level fault detection without external monitoring circuitry. While MLX90291LDC-BCA-000-TU itself is not ASIL-certified, its diagnostics support integration into ASIL-B architectures when combined with appropriate system-level measures.
What is the magnetic field range and sensitivity of the MLX90291LDC-BCA-000-TU?
The MLX90291LDC-BCA-000-TU operates across a magnetic flux density range of ±15 mT to ±400 mT, with programmable sensitivity from 15× to 193× (via ROUGHGAIN and FINEGAIN). Typical sensitivity is 80 mV/T at 50 mT, and the device achieves ±1 LSB PWM linearity (13-bit effective) within its calibrated range. This wide, user-adjustable range allows MLX90291LDC-BCA-000-TU to serve both high-precision low-field applications (e.g., pedal position) and high-immunity high-field scenarios (e.g., gear detection near motors).
Can the MLX90291LDC-BCA-000-TU operate reliably across automotive temperature ranges?
Yes, the MLX90291LDC-BCA-000-TU is fully specified for operation from –40°C to +125°C and includes on-chip 1st- and 2nd-order temperature compensation for sensitivity drift (±150 ppm/°C max) and 1st-order offset drift correction (±0.1 mT over full range). Its internal oscillator (921–1127 kHz) and PWM timing remain stable across temperature, and the SOIC-8 package is qualified for lead-free reflow up to 260°C. These features ensure MLX90291LDC-BCA-000-TU meets automotive under-hood and transmission control requirements without external calibration.
MLX90291LDC-BCA-000-TU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Melexis Technologies NV
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Hall Effect
- Axis:
- Single
- Output Type:
- PWM
- Sensing Range:
- ±15mT ~ ±400mT
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Supply (Max):
- 15mA
- Current - Output (Max):
- 20mA
- Resolution:
- 12 b
- Bandwidth:
- -
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Features:
- Programmable
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
MLX90291LDC-BCA-000-TU FAQ
1.How can I place an order for MLX90291LDC-BCA-000-TU through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90291LDC-BCA-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 MLX90291LDC-BCA-000-TU reliable?
The price and inventory of MLX90291LDC-BCA-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 MLX90291LDC-BCA-000-TU is usually 5 days.
3.What payment methods are accepted for MLX90291LDC-BCA-000-TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90291LDC-BCA-000-TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90291LDC-BCA-000-TU?
MLX90291LDC-BCA-000-TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90291LDC-BCA-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 MLX90291LDC-BCA-000-TU?
For technical support, including MLX90291LDC-BCA-000-TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90291LDC-BCA-000-TU requirements.
6.How does Aetrix verify that MLX90291LDC-BCA-000-TU is sourced from the original manufacturer or authorized distributors?
All MLX90291LDC-BCA-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 MLX90291LDC-BCA-000-TU meets industry standards.
7.What is the process for return or replacement of MLX90291LDC-BCA-000-TU?
All MLX90291LDC-BCA-000-TU units undergo pre-shipment inspection (PSI). If there is an issue with MLX90291LDC-BCA-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 MLX90291LDC-BCA-000-TU part is unused and in its original packaging.
Return procedure for MLX90291LDC-BCA-000-TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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