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Melexis Technologies NV MLX90821LXG-DBA-005-RE
- Part No.:
- MLX90821LXG-DBA-005-RE
- Manufacturer:
- Melexis Technologies NV
- Category:
- Pressure Sensors, Transducers
- Package:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
MLX90821LXG-DBA-005-RE.pdf
- Description:
- SENSOR 0.72PSID 4.5V 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,262
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Product details
Overview
MLX90821LXG-DBA-005-RE from Melexis is a factory-calibrated relative pressure sensor IC with ratiometric analog output, designed for automotive crankcase ventilation and low-differential-pressure monitoring. It delivers ±0.05 bar full-scale range, 0.5–4.5 V output, and ±2.5 mbar total pressure accuracy over –40°C to 150°C. Its integrated MEMS sensing element, 16-bit DSP, and on-chip diagnostics support robust operation in harsh engine bay environments.
For engineers reviewing the MLX90821LXG-DBA-005-RE datasheet, pinout, applications, or equivalent options, this page provides verified specifications, automotive diagnostic capabilities, pressure transfer curve details, clamping behavior, and real-world deployment context for fuel vapor, crankcase, and filter monitoring systems.
Technical Context
The MLX90821LXG-DBA-005-RE implements a piezoresistive MEMS sensing element with backside-exposed cavity, coupled to a 16-bit microcontroller-based DSP for real-time pressure linearization, temperature compensation, and programmable filtering. Its analog front end includes chopper-stabilized instrumentation amplification (gain programmable 4.49–10.6 V/V), differential ADC, and coarse offset DAC.
It supports ratiometric analog output only (no SENT) in this variant, with factory-programmed transfer curve (–0.05 to +0.05 bar → 0.5 to 4.5 V), fixed clamping levels (0.5 V / 4.5 V), and built-in diagnostics including broken-track detection, over/under-voltage monitoring, and input rail-level validation per SAE J2716-compliant thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Pressure Range | –0.05 to +0.05 bar: Enables high-resolution detection of minute pressure differentials in crankcase ventilation and evaporative emissions systems. |
| Analog Output | 0.5 V to 4.5 V ratiometric: Scales linearly with supply voltage (4.5–5.5 V), simplifying ECU ADC interface design without external scaling. |
| Pressure Accuracy | ±2.5 mbar total error: Includes nonlinearity, hysteresis, repeatability, and temperature drift across –40°C to 150°C. |
| Operating Temp | –40°C to 150°C: Qualified for under-hood placement in gasoline and diesel powertrain applications without external thermal shielding. |
| Supply Voltage | 4.5 V to 5.5 V nominal: Compatible with standard automotive 5 V regulated supplies; includes reverse-voltage (–14 V) and overvoltage (18 V) protection. |
| Response Time | 1 ms (90% step response): Achieved with PFLT = 0 and SSF disabled-suitable for dynamic pressure events like blow-by pulses. |
| Output Noise | 2 mVRMS (BW ≤ 50 kHz): Low noise floor enables stable signal acquisition even with minimal external filtering. |
Pinout & Package
MLX90821LXG-DBA-005-RE is housed in a SOIC16 WB cavity package (XG), featuring backside pressure port access and robust sealing for automotive fluid exposure resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 13, 14, 15, 16 | No Connect | Unused pins; must remain unconnected per Melexis layout guidelines to avoid parasitic coupling or mechanical stress. |
| 5, 7 | Ground (GND) | Dual GND pins provide low-impedance return path for analog and digital domains, reducing ground bounce in noisy engine environments. |
| 6 | NTC Input | Accepts external NTC thermistor current output; unused in DBA-005 configuration but retained for hardware compatibility. |
| 8 | Analog Output (VANA) | Ratiometric 0.5–4.5 V output; requires 47–470 nF capacitive load and ≥4.7 kΩ resistive load for stability per spec. |
| 9 | Supply Input (VDD) | Primary power pin; accepts 4.5–5.5 V with internal regulator-supports direct connection to vehicle 5 V rail. |
| 10, 12 | Test Pin | Factory programming and diagnostics interface; not intended for end-user access or system-level connectivity. |
| 11 | SENT Output | Reserved for SENT protocol; inactive in DBA-005 (analog-only variant); left unconnected in application circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Backside-exposed MEMS cavity | Enables direct media contact with crankcase gases or fuel vapors while maintaining high burst pressure rating (3.75 bar). |
| Programmable clamping (0.5 V / 4.5 V) | Prevents output saturation during transient overpressure events, preserving signal integrity for ECU fault interpretation. |
| Integrated diagnostics (broken track, UV/OV) | Provides fail-safe reporting via output rail drive or diagnostic flag-eliminates need for external supervision circuitry. |
| Factory-calibrated transfer curve | Delivers plug-and-play accuracy without field calibration; eliminates production line trim steps for OEM assembly lines. |
| Automotive EMC-optimized architecture | Meets stringent ISO 11452-2/4 immunity requirements via high-density CMOS integration and on-chip filtering. |
Applications
| Fuel Vapor Pressure Monitoring | Crankcase Ventilation Monitoring |
|---|---|
|
Use Scenario: Real-time detection of fuel tank vapor pressure buildup during refueling or hot soak conditions. IC Role / Device Role / Timing Role: Primary pressure transducer converting differential vapor pressure into calibrated analog voltage for PCM interpretation. Use Value: Enables precise EVAP system leak detection down to 0.01 bar resolution, supporting OBD-II compliance and emissions certification. |
Use Scenario: Continuous measurement of crankcase pressure rise during turbocharged engine operation. IC Role / Device Role / Timing Role: High-speed analog sensor feeding real-time blow-by gas data to engine control unit for PCV valve modulation. Use Value: Supports adaptive oil mist separation and prevents oil contamination by triggering active ventilation at ±0.05 bar thresholds. |
| Engine Oil Filter Clogging Detection | Brake Booster Vacuum Monitoring |
|
Use Scenario: Differential pressure measurement across oil filter media to detect progressive clogging. IC Role / Device Role / Timing Role: Relative pressure sensor mounted across filter inlet/outlet ports, delivering analog feedback to diagnostic module. Use Value: Identifies >80% flow restriction via 2.5 mbar accuracy-enabling predictive maintenance alerts before catastrophic filter failure. |
Use Scenario: Monitoring vacuum level in brake booster reservoir during hybrid/electric vehicle regenerative braking. IC Role / Device Role / Timing Role: Low-range pressure transducer providing closed-loop vacuum status to brake control module. Use Value: Ensures <1 ms response time for safety-critical brake assist activation, meeting ISO 26262 ASIL-B functional safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar relative pressure sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPXV7002DP | 2.5–3.3 V supply; 0–100 kPa range; no integrated diagnostics or programmable clamping. | Lacks automotive-grade diagnostics, temperature compensation, and burst pressure rating (1.5 bar vs. 3.75 bar). | Consider only for non-safety-critical, low-EMI industrial applications where cost outweighs functional safety needs. |
| SDP800-500PA | Digital I²C output; ±500 Pa range; 0.1% FS accuracy; no analog output or automotive qualification. | Requires external MCU for signal processing; unsuitable for direct ECU analog input or under-hood mounting. | Appropriate for HVAC or lab-grade airflow measurement-not for engine bay pressure monitoring. |
Compared with MPXV7002DP and SDP800-500PA, the MLX90821LXG-DBA-005-RE uniquely combines automotive qualification, integrated diagnostics, backside media isolation, and factory-trimmed ±2.5 mbar accuracy in a single SOIC package-reducing BOM count and validation effort for Tier 1 powertrain suppliers.
Availability
MLX90821LXG-DBA-005-RE is available at Aetrix Electronics and suitable for fuel vapor pressure monitoring, crankcase ventilation systems, and engine oil filter clogging detection requiring stable component supply across extended automotive lifecycles.
Supply support for MLX90821LXG-DBA-005-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 magnetic, infrared, and pressure sensors for automotive and industrial markets, with ISO/TS 16949-certified manufacturing and AEC-Q100 qualification expertise.
The MLX90821 product line was engineered specifically for high-reliability automotive pressure sensing-including EVAP, PCV, and filter monitoring-where media compatibility, long-term stability, and diagnostic completeness are mandatory.
FAQ
What is the pressure range and output span of the MLX90821LXG-DBA-005-RE?
The MLX90821LXG-DBA-005-RE has a calibrated relative pressure range of –0.05 to +0.05 bar, mapped to a ratiometric analog output of 0.5 V to 4.5 V at nominal 5 V supply. This narrow span enables high-resolution detection of sub-millibar changes critical for crankcase and EVAP system diagnostics. The output scales linearly with supply voltage between 4.5 V and 5.5 V, ensuring consistent performance across automotive rail variations.
Does the MLX90821LXG-DBA-005-RE support SENT output or only analog?
The MLX90821LXG-DBA-005-RE supports analog output only-it is configured exclusively for 0.5–4.5 V ratiometric operation. SENT functionality is reserved for variants with "DBA-100" option code (e.g., MLX90821LXG-DBA-100-RE). Pin 11 (SENT output) remains inactive in this part, and no SENT frame generation or configuration is possible on the MLX90821LXG-DBA-005-RE.
How is the MLX90821LXG-DBA-005-RE calibrated, and can it be reprogrammed in-system?
The MLX90821LXG-DBA-005-RE undergoes final-test factory calibration, with pressure transfer curve, clamping levels, and compensation coefficients permanently stored in on-chip EEPROM. While Melexis provides programming tools for advanced users, the DBA-005 variant is delivered with fixed settings (–0.05/+0.05 bar, 0.5/4.5 V) and does not require or support field reprogramming for standard automotive applications.
What diagnostic features are active on the MLX90821LXG-DBA-005-RE?
The MLX90821LXG-DBA-005-RE includes clamping-level diagnostics, broken-track detection on supply/ground lines, overvoltage/undervoltage monitoring, and input-level validation for InP/InN bridge signals. These diagnostics are enabled by default and report faults via output rail drive (e.g., forcing VANA to 0.5 V or 4.5 V) without requiring external supervision circuitry-meeting ISO 26262 functional safety expectations.
Is the MLX90821LXG-DBA-005-RE qualified for under-hood automotive use?
Yes-the MLX90821LXG-DBA-005-RE is AEC-Q100 qualified for Grade 0 (–40°C to +150°C ambient), features robust SOIC16 WB cavity packaging with backside media access, and withstands 3.75 bar burst pressure. Its EMC-hardened architecture, reverse-voltage protection (–14 V), and integrated diagnostics make it suitable for direct under-hood mounting in gasoline, diesel, and hybrid powertrain applications.
MLX90821LXG-DBA-005-RE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Melexis Technologies NV
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Board Mount
- Pressure Type:
- Differential
- Operating Pressure:
- -0.72PSI ~ 0.72PSI (-4.98kPa ~ 4.98kPa)
- Output Type:
- Analog Voltage
- Output:
- 0.5 V ~ 4.5 V
- Accuracy:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Port Size:
- -
- Port Style:
- No Port
- Features:
- Amplified Output, Temperature Compensated
- Termination Style:
- Gull Wing
- Maximum Pressure:
- -
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MLX90821LXG-DBA-005-RE FAQ
1.How can I place an order for MLX90821LXG-DBA-005-RE through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90821LXG-DBA-005-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 MLX90821LXG-DBA-005-RE reliable?
The price and inventory of MLX90821LXG-DBA-005-RE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MLX90821LXG-DBA-005-RE is usually 5 days.
3.What payment methods are accepted for MLX90821LXG-DBA-005-RE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90821LXG-DBA-005-RE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90821LXG-DBA-005-RE?
MLX90821LXG-DBA-005-RE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90821LXG-DBA-005-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 MLX90821LXG-DBA-005-RE?
For technical support, including MLX90821LXG-DBA-005-RE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90821LXG-DBA-005-RE requirements.
6.How does Aetrix verify that MLX90821LXG-DBA-005-RE is sourced from the original manufacturer or authorized distributors?
All MLX90821LXG-DBA-005-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 MLX90821LXG-DBA-005-RE meets industry standards.
7.What is the process for return or replacement of MLX90821LXG-DBA-005-RE?
All MLX90821LXG-DBA-005-RE units undergo pre-shipment inspection (PSI). If there is an issue with MLX90821LXG-DBA-005-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 MLX90821LXG-DBA-005-RE part is unused and in its original packaging.
Return procedure for MLX90821LXG-DBA-005-RE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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