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Melexis Technologies NV MLX90821LXG-DBA-003-RE
- Part No.:
- MLX90821LXG-DBA-003-RE
- Manufacturer:
- Melexis Technologies NV
- Category:
- Pressure Sensors, Transducers
- Package:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
MLX90821LXG-DBA-003-RE.pdf
- Description:
- SENSOR 3.77PSID 4.5V 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,810
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Product details
Overview
MLX90821LXG-DBA-003-RE from Melexis is a factory-calibrated relative pressure sensor IC delivering ratiometric analog output (0.5 V to 4.5 V) over a -0.06 to 0.26 bar range, with ±4.8 mbar total pressure accuracy and integrated diagnostics for automotive crankcase ventilation and fuel vapor pressure monitoring.
For engineers reviewing the MLX90821LXG-DBA-003-RE datasheet, pinout, applications, or equivalent options, this page provides verified functional architecture, calibrated transfer curve details, diagnostic thresholds, EMC-hardened supply protection, and SOIC16 WB cavity package implementation guidance.
Technical Context
The MLX90821LXG-DBA-003-RE integrates a backside-exposed piezoresistive MEMS sensing element, 16-bit microcontroller-based DSP for real-time temperature-compensated linearization, and dual-output capability (analog or SENT). Its analog front end includes programmable gain instrumentation amplification (Gst1 = 4.49–10.6 V/V), coarse offset DAC, and chopper-stabilized stages.
It implements automotive-grade diagnostics including broken-track detection on InP/InN inputs, clamping-level programmability (7-bit low / 9-bit high), overvoltage (-14 V reverse / +18 V forward) protection, and power-on reset with hysteresis (100–500 mV). The device operates across -40°C to 150°C and supports configurable PFLT (0–9) and SSF filters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Pressure Range | -0.06 to 0.26 bar - calibrated full-scale span for low-differential automotive pressure sensing |
| Analog Output | 0.5 V to 4.5 V ratiometric - scales linearly with supply voltage (4.5–5.5 V), enabling direct ADC interfacing without external scaling |
| Pressure Accuracy | ±4.8 mbar total error - includes initial offset, sensitivity, nonlinearity, and temperature drift over -40°C to 150°C |
| Supply Voltage | 4.5 V to 5.5 V nominal - supports standard 5 V automotive rail with ±9% analog regulator tolerance |
| Operating Temp | -40°C to 150°C - qualified for under-hood engine bay placement in gasoline/diesel powertrain systems |
| Response Time | 1 ms (90% step response) - measured at default PFLT=0 and 100 nF capacitive load, suitable for dynamic crankcase pressure tracking |
| Diagnostics | Broken-track, overvoltage, under-voltage, overpressure - configurable via EEPROM with rail-driven fault signaling |
Pinout & Package
MLX90821LXG-DBA-003-RE uses a SOIC16 WB cavity package with exposed backside die for media resistance and robust sealing. Pin 1–4 and 13–16 are NC; pins 5 and 7 are ground; pin 9 is supply input; pin 8 is analog output; pin 6 accepts external NTC; pins 11 and 12 are test points.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 5, Pin 7 | Ground (GND) | Dual ground terminals reduce impedance for analog reference stability and EMC immunity |
| Pin 9 | Supply Input (Vsupply) | Accepts 4.5–5.5 V with integrated overvoltage/reverse-voltage protection up to ±18 V / -14 V |
| Pin 8 | Analog Output (Vana) | Ratiometric 0.5–4.5 V output; supports 4.7 kΩ pull-up/down and 47–470 nF capacitive load |
| Pin 6 | NTC Input | Accepts external NTC current output (0–3.5 V range); enables ±1°C compensated temperature reporting |
| Pin 11 | SENT Output | Digital SENT v4.0 compliant output (J2716 rev Apr 2016); optional alternative to analog mode |
| Pin 12, Pin 10 | Test Pins | Factory programming and diagnostic access; not intended for end-user circuit connection |
Key Features
| Feature | Design Value |
|---|---|
| Backside-exposed MEMS | Enables direct media contact with high resistance to fuel vapor, oil mist, and condensate in crankcase/fuel systems |
| Programmable Clamping | 7-bit low / 9-bit high clamping levels allow precise saturation control to prevent downstream ADC clipping |
| Integrated DSP Linearization | 16-bit MCU applies real-time pressure/temperature compensation using factory-stored calibration coefficients |
| Automotive Diagnostics | Includes broken-track detection on InP/InN, supply rail monitoring, and configurable fault flagging per SAE J2716 |
| EMC-Hardened Architecture | Optimized CMOS layout and on-chip regulators deliver best-in-class immunity to conducted/radiated noise in 12 V systems |
Applications
| Fuel Vapor Pressure Monitoring | Crankcase Ventilation Pressure Sensing |
|---|---|
|
Use Scenario: Real-time measurement of evaporative emissions system pressure during OBD-II leak detection cycles. IC Role / Device Role / Timing Role: Primary pressure transducer providing ratiometric analog output synchronized to ECU PWM-controlled purge valve timing. Use Value: ±4.8 mbar accuracy ensures reliable 10 mbar leak detection threshold compliance across -40°C to 125°C ambient. |
Use Scenario: Continuous monitoring of positive crankcase pressure in turbocharged diesel engines to trigger PCV valve actuation. IC Role / Device Role / Timing Role: High-speed analog sensor with 1 ms response time feeding closed-loop pressure regulation logic in engine control unit. Use Value: Backside-exposed MEMS withstands oil-laden vapor exposure while maintaining stable zero-point over 10,000-hour lifetime. |
| Exhaust Gas Recirculation (EGR) Differential Pressure | Aftertreatment Filter Clogging Detection |
|
Use Scenario: Measuring pressure drop across EGR cooler to infer flow rate and detect internal blockage. IC Role / Device Role / Timing Role: Low-range differential pressure sensor with -0.06 to 0.26 bar span operating in harsh under-hood thermal cycling. Use Value: Factory calibration eliminates need for field zeroing; 150°C rating supports mounting near exhaust manifolds. |
Use Scenario: Detecting soot accumulation in diesel particulate filters by monitoring upstream/downstream pressure delta. IC Role / Device Role / Timing Role: Ratiometric analog output interfaces directly with 12-bit ECU ADC; diagnostics flag open-circuit failure during regeneration cycles. Use Value: Integrated broken-track diagnostics prevent false clogging alarms caused by harness disconnection or corrosion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar relative pressure sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPXV7025DP | 25 kPa full scale, 0–5 V output, no integrated diagnostics or SENT option | Lacks automotive-grade clamping, broken-track detection, and programmable filter settings | Requires external fault monitoring circuitry; suitable only for non-safety-critical industrial use |
| SSM2205Z | 0.25 bar range, 0.5–4.5 V output, 12-bit resolution, no MEMS backside exposure | No NTC interface, no EEPROM programmability, limited to 125°C operation | Lower cost but requires external temperature compensation and cannot replace MLX90821LXG-DBA-003-RE in high-temp automotive locations |
Compared with MPXV7025DP and SSM2205Z, MLX90821LXG-DBA-003-RE delivers higher accuracy (±4.8 mbar vs ±12.5 mbar), extended temperature support (150°C vs 125°C), and built-in diagnostics-reducing system-level validation effort for ISO 26262 ASIL-B–related functions.
Availability
MLX90821LXG-DBA-003-RE is available at Aetrix Electronics and suitable for fuel vapor pressure monitoring, crankcase ventilation sensing, and aftertreatment filter clogging detection requiring stable component supply across automotive production lifecycles.
Supply support for MLX90821LXG-DBA-003-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, pressure, and infrared sensor solutions for automotive and industrial markets, with ISO/TS 16949 certification and AEC-Q100 qualification expertise.
The MLX90821 product line delivers highly accurate, diagnostics-rich relative pressure sensing for demanding automotive subsystems-including emissions control, engine management, and thermal management-where long-term stability and functional safety are critical.
FAQ
What is the calibrated pressure range and output behavior of the MLX90821LXG-DBA-003-RE?
The MLX90821LXG-DBA-003-RE is factory calibrated for a relative pressure range of -0.06 bar to +0.26 bar, producing a ratiometric analog output from 0.5 V to 4.5 V at nominal 5 V supply. This output scales linearly with supply voltage between 4.5 V and 5.5 V, ensuring consistent full-scale span across rail variations. The device also supports SENT digital output via pin 11 when configured for DBA-100 variant, but MLX90821LXG-DBA-003-RE defaults to analog-only operation.
How does the MLX90821LXG-DBA-003-RE handle diagnostic faults such as broken sensor connections?
The MLX90821LXG-DBA-003-RE implements active broken-track diagnostics on its InP and InN inputs, detecting open-circuit conditions by monitoring input voltage levels against 25% and 75% of VDDA thresholds. When triggered, it drives the analog output to programmable clamp levels (default LCL = 0.25 V, HCL = 4.75 V) and asserts fault flags via internal registers accessible through the test pins. These diagnostics meet automotive requirements for fail-safe behavior in crankcase and fuel vapor systems.
Can the MLX90821LXG-DBA-003-RE operate reliably in high-temperature under-hood environments?
Yes, the MLX90821LXG-DBA-003-RE is qualified for continuous operation from -40°C to +150°C and features a robust SOIC16 WB cavity package with backside-exposed MEMS die optimized for thermal stability. Its pressure accuracy specification (±4.8 mbar) and internal temperature compensation remain valid across this full range, and the device includes dedicated diagnostics for overtemperature events. It has been validated in diesel engine crankcase and turbocharger proximity applications.
What EMC performance characteristics does the MLX90821LXG-DBA-003-RE provide in automotive 12 V systems?
The MLX90821LXG-DBA-003-RE employs a high-density CMOS process and optimized analog front-end architecture to achieve best-in-class EMC immunity per ISO 11452 and ISO 7637 standards. It integrates overvoltage protection (up to +18 V) and reverse-voltage protection (-14 V) on the supply rail, plus chopper-stabilized amplification and differential signal paths to suppress common-mode noise. These features enable direct integration into noisy powertrain control modules without additional filtering components.
Is external temperature compensation required when using the MLX90821LXG-DBA-003-RE for pressure measurement?
No, external temperature compensation is not required. The MLX90821LXG-DBA-003-RE embeds a 16-bit DSP that applies factory-programmed, temperature-dependent linearization to the raw pressure signal using on-chip calibration data. This fully compensates for sensitivity drift and offset drift across -40°C to 150°C. An optional external NTC can be connected to pin 6 for enhanced temperature reporting, but the core pressure accuracy specification of ±4.8 mbar already includes full internal temperature compensation.
MLX90821LXG-DBA-003-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:
- -0.87PSI ~ 3.77PSI (-6kPa ~ 26kPa)
- 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-003-RE FAQ
1.How can I place an order for MLX90821LXG-DBA-003-RE through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90821LXG-DBA-003-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-003-RE reliable?
The price and inventory of MLX90821LXG-DBA-003-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-003-RE is usually 5 days.
3.What payment methods are accepted for MLX90821LXG-DBA-003-RE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90821LXG-DBA-003-RE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90821LXG-DBA-003-RE?
MLX90821LXG-DBA-003-RE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90821LXG-DBA-003-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-003-RE?
For technical support, including MLX90821LXG-DBA-003-RE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90821LXG-DBA-003-RE requirements.
6.How does Aetrix verify that MLX90821LXG-DBA-003-RE is sourced from the original manufacturer or authorized distributors?
All MLX90821LXG-DBA-003-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-003-RE meets industry standards.
7.What is the process for return or replacement of MLX90821LXG-DBA-003-RE?
All MLX90821LXG-DBA-003-RE units undergo pre-shipment inspection (PSI). If there is an issue with MLX90821LXG-DBA-003-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-003-RE part is unused and in its original packaging.
Return procedure for MLX90821LXG-DBA-003-RE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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