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Melexis Technologies NV MLX90821LXG-DBA-006-RE
- Part No.:
- MLX90821LXG-DBA-006-RE
- Manufacturer:
- Melexis Technologies NV
- Category:
- Pressure Sensors, Transducers
- Package:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
MLX90821LXG-DBA-006-RE.pdf
- Description:
- SENSOR 7.25PSID 4.5V 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,879
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Product details
Overview
MLX90821LXG-DBA-006-RE from Melexis is a factory-calibrated relative pressure sensor IC with ratiometric analog output, -0.2 to 0.5 bar full-scale range, 4.5 V to 0.5 V inverse transfer curve, and automotive-grade operation from -40°C to 150°C. It integrates MEMS sensing element, 16-bit microcontroller, analog front end, DAC, EEPROM, and diagnostics for crankcase ventilation and fuel vapor pressure monitoring.
For engineers reviewing the MLX90821LXG-DBA-006-RE datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, calibrated transfer characteristics, diagnostic capabilities, SOIC16 WB package details, and automotive system integration guidance.
Technical Context
The MLX90821LXG-DBA-006-RE implements a piezoresistive MEMS diaphragm with on-chip signal conditioning, 16-bit ADC, DSP-based temperature compensation, and programmable first-order low-pass filter (PFLT) with settings 0–9. Its analog front end includes chopper-stabilized instrumentation amplifier (gain 4.5–10.6), differential stage, and integrator supporting ±83 mV full-scale differential input at highest gain.
It delivers ratiometric analog output referenced to VDD (4.5 V to 0.5 V over -0.2 to 0.5 bar), supports clamping (0.3 V / 4.7 V), and embeds diagnostics including broken-track detection, over/under-voltage monitoring, and InP/InN input level validation against 25%/75% VDDA thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Pressure Range | -0.2 to 0.5 bar relative - enables detection of positive crankcase pressure buildup and negative vapor line depressurization in EVAP systems. |
| Analog Output Curve | 4.5 V to 0.5 V ratiometric - inverse slope simplifies ECU interpretation for pressure rise/fall directionality without software inversion. |
| Output Accuracy | ±40 mV (±1 %FS) or ±7 mbar - ensures reliable fault detection in filter clogging or leak diagnostics within automotive OBD-II requirements. |
| Operating Temperature | -40°C to 150°C - qualified for under-hood placement near engine blocks and turbochargers without external thermal shielding. |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V automotive power domains and tolerant of battery transients up to 18 V. |
| Response Time | 0.93 ms (PFLT = 0) - supports real-time combustion cycle–synchronized pressure sampling in active crankcase ventilation control. |
| Diagnostic Coverage | Broken-track, over/under-voltage, over/under-pressure, InP/InN rail detection - reduces need for external supervision circuitry in ASIL-B designs. |
Pinout & Package
MLX90821LXG-DBA-006-RE is housed in a SOIC16 WB cavity package with backside pressure port, optimized for media resistance and mechanical robustness in harsh under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 5, 7 | Ground (GND) | Dual GND pins provide low-impedance return path for analog and digital sections, reducing ground bounce in noisy engine bays. |
| 6 | NTC Input | Accepts external NTC thermistor current for compensated temperature measurement; supports optional ±1°C accuracy. |
| 8 | Analog Output (VANA) | Ratiometric voltage output (4.5 V → 0.5 V) directly interfaces standard 12-bit ADC inputs in automotive ECUs. |
| 9 | Supply Input (VDD) | 5 V nominal supply with integrated overvoltage (18 V) and reverse-voltage (-14 V) protection - eliminates need for external TVS. |
| 11 | SENT Output | Digital SENT v4.0 output available via programming; not active in DBA-006 default analog-only configuration. |
| 12, 10 | Test Pins | Factory test access points; not intended for end-user connection - left unconnected in final design. |
| 1–4, 13–16 | Not Connected | No internal connection; must remain floating per Melexis layout guidelines to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Back-side exposed MEMS | Enables direct media contact with high chemical resistance to fuel vapors, oil mist, and condensates in crankcase systems. |
| Factory-calibrated transfer curve | Eliminates field calibration; guarantees -0.2 to 0.5 bar range with 4.5 V → 0.5 V slope and ±7 mbar accuracy across -40°C to 150°C. |
| Programmable clamping levels | LCL = 0.3 V / HCL = 4.7 V prevents saturation during transient overpressure events while preserving resolution in normal operating band. |
| Integrated diagnostics | Real-time detection of open-circuit InP/InN lines, supply faults, and out-of-range pressure - reduces BOM count and improves ISO 26262 ASIL-B compliance. |
| Automotive EMC robustness | High-density CMOS + optimized architecture meets CISPR 25 Class 5 radiated immunity and ISO 11452-4 bulk current injection requirements. |
Applications
| Fuel Vapor Pressure Monitoring | Crankcase Ventilation Control |
|---|---|
|
Use Scenario: Real-time detection of evaporative emissions system (EVAP) leaks and purge valve integrity during OBD-II drive cycles. IC Role / Device Role / Timing Role: Primary pressure transducer measuring tank headspace pressure with 0.93 ms response and ±7 mbar accuracy. Use Value: Enables pass/fail decision on 0.02 inch leak detection per SAE J1978, eliminating need for secondary vacuum pumps or reference sensors. |
Use Scenario: Monitoring blow-by gas pressure in diesel and gasoline engines to regulate PCV valve duty cycle and prevent oil contamination. IC Role / Device Role / Timing Role: High-temperature relative pressure sensor mounted on valve cover, reporting dynamic pressure shifts during acceleration/deceleration. Use Value: Supports closed-loop PCV control that reduces oil consumption by 12–18% and extends service intervals in modern turbocharged powertrains. |
| Exhaust Gas Recirculation (EGR) Differential Sensing | Aftertreatment Filter Clogging Detection |
|
Use Scenario: Measuring pressure drop across EGR coolers and valves to detect carbon buildup and flow restriction in Tier 4 Final engines. IC Role / Device Role / Timing Role: Differential pressure interface using InP/InN inputs; configured for ±0.5 bar range with inverse analog output. Use Value: Provides early warning of cooler fouling before DPF regeneration inefficiency exceeds 15%, enabling predictive maintenance scheduling. |
Use Scenario: Detecting soot accumulation in diesel particulate filters (DPF) or gasoline particulate filters (GPF) via upstream/downstream pressure delta. IC Role / Device Role / Timing Role: Paired sensor configuration where MLX90821LXG-DBA-006-RE measures upstream pressure with high common-mode rejection. Use Value: Delivers ±0.5 bar full-scale range and <1 ms response to trigger forced regenerations before backpressure exceeds 25 kPa safety limit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar relative pressure sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPXV7025GP | 0–25 kPa range, 0.2–4.8 V output, no integrated diagnostics or programmable clamping. | Lacks automotive-grade diagnostics, temperature compensation, and media-resistant packaging - requires external fault monitoring. | Use only in non-safety-critical, ambient-temperature industrial gauges where cost is primary constraint. |
| SSM2018-001 | 0–100 kPa range, 0.5–4.5 V output, SPI interface, no SENT/analog dual mode or MEMS backside exposure. | Designed for HVAC and medical devices; lacks burst pressure rating (3.75 bar) and -40°C to 150°C qualification. | Select when digital interface and higher pressure range outweigh automotive qualification and media compatibility needs. |
Compared with MPXV7025GP and SSM2018-001, MLX90821LXG-DBA-006-RE uniquely combines backside-exposed MEMS, factory-calibrated inverse analog output, embedded diagnostics, and full AEC-Q100 Grade 0 qualification - making it the only drop-in solution for crankcase and EVAP systems requiring zero-layout redesign.
Availability
MLX90821LXG-DBA-006-RE is available at Aetrix Electronics and suitable for fuel vapor pressure monitoring, crankcase ventilation control, and aftertreatment filter clogging detection requiring stable component supply across extended automotive production lifecycles.
Supply support for MLX90821LXG-DBA-006-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 sensor solutions for automotive and industrial markets, with ISO/TS 16949-certified manufacturing and AEC-Q100-compliant product development.
The MLX90821 product line was designed specifically for high-reliability relative pressure measurement in harsh automotive environments - emphasizing media resistance, diagnostic completeness, and seamless integration into ASIL-B ECU architectures.
FAQ
What is the pressure range and output behavior of the MLX90821LXG-DBA-006-RE?
The MLX90821LXG-DBA-006-RE has a calibrated relative pressure range of -0.2 to 0.5 bar. Its analog output is ratiometric and inverse: 4.5 V at -0.2 bar and 0.5 V at 0.5 bar, scaling linearly across the range. This behavior is factory-programmed and stored in EEPROM, ensuring consistent performance without host MCU compensation. The MLX90821LXG-DBA-006-RE maintains this transfer function across its full -40°C to 150°C operating temperature range.
Does the MLX90821LXG-DBA-006-RE support SENT output, or is it analog-only?
The MLX90821LXG-DBA-006-RE is shipped with analog output enabled by default and SENT disabled. However, it retains full SENT v4.0 capability (per SAE J2716 rev 4) and can be reprogrammed via the connector to deliver SENT frames containing pressure, internal temperature, and optional NTC data. Reprogramming requires Melexis' PTC-04 programmer and MLX IDE software - the MLX90821LXG-DBA-006-RE hardware supports both modes without change.
How does the MLX90821LXG-DBA-006-RE handle diagnostic fault conditions?
The MLX90821LXG-DBA-006-RE implements multiple autonomous diagnostics: broken-track detection on InP/InN, over/under-voltage monitoring, over/under-pressure alerts, and rail-level validation. When triggered, it drives the analog output to programmable clamp levels (0.3 V / 4.7 V) and asserts diagnostic flags in SENT frames. These features are enabled by default and require no host intervention - the MLX90821LXG-DBA-006-RE reports faults continuously during normal operation.
What package type and mounting considerations apply to the MLX90821LXG-DBA-006-RE?
The MLX90821LXG-DBA-006-RE uses a SOIC16 WB (wide-body) cavity package with a backside pressure port. Mounting requires sealing the PCB side with compliant gasket material (e.g., silicone RTV) to isolate the cavity from ambient air while exposing the MEMS diaphragm to the measured medium. Pin 1 is marked with a dot; pins 1–4 and 13–16 are NC and must remain unconnected. The MLX90821LXG-DBA-006-RE is compatible with standard lead-free reflow profiles per J-STD-020.
Can the MLX90821LXG-DBA-006-RE be recalibrated or reconfigured in-system?
Yes - the MLX90821LXG-DBA-006-RE supports full in-system reconfiguration via its two-wire communication interface using supply voltage modulation (VDD_com entry at 6.2–7.8 V). Users can update pressure transfer curves, clamping levels, filter settings (PFLT/SSF), diagnostics enablement, and SENT parameters without removing the device. All settings are stored in on-chip EEPROM, and the MLX90821LXG-DBA-006-RE retains them through power cycles and temperature extremes.
MLX90821LXG-DBA-006-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:
- -2.9PSI ~ 7.25PSI (-20kPa ~ 50kPa)
- 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-006-RE FAQ
1.How can I place an order for MLX90821LXG-DBA-006-RE through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90821LXG-DBA-006-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-006-RE reliable?
The price and inventory of MLX90821LXG-DBA-006-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-006-RE is usually 5 days.
3.What payment methods are accepted for MLX90821LXG-DBA-006-RE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90821LXG-DBA-006-RE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90821LXG-DBA-006-RE?
MLX90821LXG-DBA-006-RE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90821LXG-DBA-006-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-006-RE?
For technical support, including MLX90821LXG-DBA-006-RE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90821LXG-DBA-006-RE requirements.
6.How does Aetrix verify that MLX90821LXG-DBA-006-RE is sourced from the original manufacturer or authorized distributors?
All MLX90821LXG-DBA-006-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-006-RE meets industry standards.
7.What is the process for return or replacement of MLX90821LXG-DBA-006-RE?
All MLX90821LXG-DBA-006-RE units undergo pre-shipment inspection (PSI). If there is an issue with MLX90821LXG-DBA-006-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-006-RE part is unused and in its original packaging.
Return procedure for MLX90821LXG-DBA-006-RE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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