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Home > Products > Sensors, Transducers > Pressure Sensors, Transducers

Melexis Technologies NV MLX90821LXG-DBA-008-SP

Name: MLX90821LXG-DBA-008-SP
Brand: Melexis Technologies NV
SKU: MLX90821LXG-DBA-008-SP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MLX90821LXG-DBA-008-SP

Manufacturer:: Melexis Technologies NV

Category:: Pressure Sensors, Transducers

Package:: 16-SOIC (0.295", 7.50mm Width) Exposed Pad

Datasheet:: MLX90821LXG-DBA-008-SP.pdf

Description:: SENSOR 0.18PSI 4.5V 16SOIC

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Product details

Overview

MLX90821LXG-DBA-008-SP from Melexis is a factory-calibrated relative pressure sensor IC with ratiometric analog output, designed for ultra-low-range automotive pressure monitoring. It delivers 4.5 V to 0.5 V output over −0.0375 to +0.0125 bar range, features integrated 16-bit microcontroller-based signal conditioning, ±2 mBar total pressure accuracy, and operates across −40°C to 115°C (temperature code V). It is used in crankcase ventilation and fuel vapor pressure sensing where high resolution at near-atmospheric differential pressures is critical.

For engineers reviewing the MLX90821LXG-DBA-008-SP datasheet, pinout, applications, or equivalent options, this page provides verified technical context, exact pin functions, calibrated transfer curve details, diagnostic capabilities, and validated alternative options for low-differential-pressure automotive sensor selection.

Technical Context

The MLX90821LXG-DBA-008-SP integrates a backside-exposed piezoresistive MEMS sensing element with a 16-bit DSP-based signal chain including PGA, 16-bit ADC, temperature-compensated linearization, and programmable clamping. Its analog front end supports configurable gain (up to −237.4 V/V) and dual-stage diagnostics for InP/InN open-circuit detection.

It implements two digital filters-PFLT (programmable first-order LPF, 0–9 depth) and SSF (small-signal filter)-with response time as low as 1 ms (PFLT=0), and supports SENT output on alternate variants. This variant uses analog output only, with inverted polarity (4.5 V @ −0.0375 bar, 0.5 V @ +0.0125 bar) and factory-programmed clamping levels of 0.3 V / 4.7 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Pressure Range	−0.0375 to +0.0125 bar: Enables detection of minute crankcase or fuel vapor pressure deviations near atmospheric conditions.
Analog Output Polarity	Inverted (4.5 V → 0.5 V): Simplifies interface with downstream ADCs expecting descending voltage for increasing pressure in vacuum-referenced systems.
Total Pressure Accuracy	±2 mBar (typ): Specifies absolute error bound across full temperature range (−40°C to 115°C), critical for emission control compliance.
Supply Voltage	4.5–5.5 V: Ratiometric operation ensures output scaling with supply, reducing system-level calibration burden.
Operating Temperature	−40°C to 115°C (V-code): Qualified for under-hood applications excluding extreme powertrain zones requiring 150°C rating.
Response Time	1 ms (90% step response, PFLT=0): Supports real-time monitoring of transient pressure events such as blow-by pulses.
Output Clamping	0.3 V / 4.7 V: Hardware-enforced voltage limits prevent erroneous readings during sensor fault or line disconnection.

Pinout & Package

MLX90821LXG-DBA-008-SP is housed in a SOIC16 WB cavity package (XG), featuring backside pressure port access and robust sealing for automotive fluid environments.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 13, 14, 15, 16	No Connect	Unused pins; must remain unconnected per design to avoid parasitic coupling or mechanical stress.
5, 7	Ground (GND)	Dual GND pins reduce impedance and improve noise immunity in high-EMC automotive harnesses.
6	NTC Input	Accepts external NTC thermistor current for compensated temperature measurement; not used in DBA-008 default config.
8	Analog Output (Vana)	Ratiometric 0.5–4.5 V (inverted) output; requires 4.7 kΩ pull-up/down load and ≤470 nF capacitive load.
9	Supply Input (Vsupply)	Primary power input with reverse/overvoltage protection (−14 V to +18 V); powers internal regulators and bridge.
10, 12	Test Pins	Factory programming and diagnostics access; not intended for end-user connection in final application.
11	SENT Output	Not active in DBA-008 configuration; remains high-impedance unless reprogrammed to SENT mode.

Key Features

Feature	Design Value
Backside-exposed MEMS diaphragm	Enables direct media contact and higher resistance to aggressive automotive fluids (e.g., oil mist, fuel vapors) without gel fill or isolation membranes.
Programmable clamping (7-bit low / 9-bit high)	Allows field-tuning of fault detection thresholds (e.g., 0.3 V low clamp) to match system-level wiring fault models and ECU ADC input ranges.
Integrated broken-track diagnostics	Detects open-circuit conditions on InP/InN lines by driving outputs to rails, enabling fail-safe ECU response without external circuitry.
Factory-calibrated transfer curve	Eliminates need for end-of-line pressure calibration; DBA-008's −0.0375/+0.0125 bar range is laser-trimmed and stored in EEPROM with gain/offset compensation.
Automotive-grade EMC performance	Validated against ISO 11452-2/4/8 and ISO 7637-2/3, ensuring reliable operation in noisy 12 V vehicle electrical systems.

Applications

Fuel Vapor Pressure Monitoring	Crankcase Ventilation (PCV) Sensing
Use Scenario: Continuous measurement of fuel tank vapor pressure to detect leaks per OBD-II evaporative emission standards. IC Role / Device Role / Timing Role: Primary pressure transducer delivering ratiometric analog output synchronized to engine cycle timing for leak detection algorithms. Use Value: ±2 mBar accuracy enables detection of <10 mbar pressure decay over 10-minute test cycles, meeting EPA Tier 3 requirements.	Use Scenario: Real-time monitoring of crankcase pressure buildup during turbocharged engine operation to prevent oil seal failure. IC Role / Device Role / Timing Role: Low-latency analog sensor feeding closed-loop PCV valve control with 1 ms response supporting transient blow-by pulse tracking. Use Value: Inverted 4.5 V → 0.5 V output maps naturally to ECU ADC full-scale range, minimizing signal conditioning components.
Engine Oil Mist Detection	Aftertreatment System Filter Monitoring
Use Scenario: Detecting abnormal oil mist concentration in turbocharger inlet air via differential pressure across coalescing filter. IC Role / Device Role / Timing Role: Differential pressure sensor measuring sub-50 mbar delta-P between clean and contaminated sides of oil separator. Use Value: −0.0375 to +0.0125 bar range resolves <0.5 mbar changes, enabling early warning of filter clogging before oil carryover occurs.	Use Scenario: Monitoring pressure drop across diesel particulate filter (DPF) or gasoline particulate filter (GPF) to trigger regeneration cycles. IC Role / Device Role / Timing Role: High-stability relative pressure node providing drift-compensated data to powertrain control module for soot load estimation. Use Value: Automotive temperature qualification (−40°C to 115°C) ensures accuracy across exhaust heat soak and cold-start conditions without recalibration.

Fuel Vapor Pressure Monitoring

Crankcase Ventilation (PCV) Sensing

Use Scenario: Continuous measurement of fuel tank vapor pressure to detect leaks per OBD-II evaporative emission standards.

IC Role / Device Role / Timing Role: Primary pressure transducer delivering ratiometric analog output synchronized to engine cycle timing for leak detection algorithms.

Use Value: ±2 mBar accuracy enables detection of <10 mbar pressure decay over 10-minute test cycles, meeting EPA Tier 3 requirements.

Use Scenario: Real-time monitoring of crankcase pressure buildup during turbocharged engine operation to prevent oil seal failure.

IC Role / Device Role / Timing Role: Low-latency analog sensor feeding closed-loop PCV valve control with 1 ms response supporting transient blow-by pulse tracking.

Use Value: Inverted 4.5 V → 0.5 V output maps naturally to ECU ADC full-scale range, minimizing signal conditioning components.

Engine Oil Mist Detection

Aftertreatment System Filter Monitoring

Use Scenario: Detecting abnormal oil mist concentration in turbocharger inlet air via differential pressure across coalescing filter.

IC Role / Device Role / Timing Role: Differential pressure sensor measuring sub-50 mbar delta-P between clean and contaminated sides of oil separator.

Use Value: −0.0375 to +0.0125 bar range resolves <0.5 mbar changes, enabling early warning of filter clogging before oil carryover occurs.

Use Scenario: Monitoring pressure drop across diesel particulate filter (DPF) or gasoline particulate filter (GPF) to trigger regeneration cycles.

IC Role / Device Role / Timing Role: High-stability relative pressure node providing drift-compensated data to powertrain control module for soot load estimation.

Use Value: Automotive temperature qualification (−40°C to 115°C) ensures accuracy across exhaust heat soak and cold-start conditions without recalibration.

Equivalent & Alternatives

The following parts are listed as comparable options for similar relative pressure sensing applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MLX90821LXG-DBA-007-SP	Wider range (−0.1 to +0.1 bar), 0.5–4.5 V non-inverted output, ±4.5 mBar accuracy, L-temp (−40°C to 150°C).	Suitable for higher-dynamic-range PCV or turbo boost monitoring where bidirectional symmetry matters more than ultra-fine resolution.	Select when system requires symmetric pressure span and full 150°C operation, accepting reduced resolution vs. DBA-008.
MPXV7025GP	Analog output only, −25 to +25 kPa (−0.25 to +0.25 bar), 0.2–4.7 V ratiometric, ±2.5% FS accuracy, −40°C to 125°C.	Lower accuracy and no integrated diagnostics; requires external signal conditioning and fault logic for automotive use.	Choose for cost-sensitive non-safety-critical applications where Melexis-level diagnostics and calibration are not mandated.

Compared with MLX90821LXG-DBA-008-SP, DBA-007 offers broader range and higher temperature rating but lower resolution, while MPXV7025GP lacks on-chip diagnostics, programmability, and automotive qualification-making it suitable only for less demanding industrial contexts.

Availability

MLX90821LXG-DBA-008-SP is available at Aetrix Electronics and suitable for fuel vapor leak detection, crankcase ventilation monitoring, and aftertreatment filter pressure drop measurement requiring stable component supply across automotive production lifecycles.

Supply support for MLX90821LXG-DBA-008-SP 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 integrated, factory-calibrated relative pressure sensors targeting stringent automotive applications-including emissions control, engine management, and powertrain health monitoring-where reliability, accuracy, and diagnostic capability are mandatory.

FAQ

What is the pressure range and output behavior of the MLX90821LXG-DBA-008-SP?

The MLX90821LXG-DBA-008-SP has a calibrated relative pressure range of −0.0375 to +0.0125 bar. Its analog output is inverted ratiometric: 4.5 V corresponds to −0.0375 bar, and 0.5 V corresponds to +0.0125 bar, with linear interpolation across the span. This behavior is factory-programmed and stored in EEPROM, requiring no user calibration.

Does the MLX90821LXG-DBA-008-SP support SENT output?

No, the MLX90821LXG-DBA-008-SP is configured exclusively for analog output. SENT functionality is available only on variants like MLX90821LXG-DBA-100-SP. Pin 11 (SENT output) remains high-impedance in DBA-008; reprogramming to SENT mode is not supported for this option code.

What is the operating temperature range for MLX90821LXG-DBA-008-SP?

The MLX90821LXG-DBA-008-SP uses temperature code V, specifying an operating range of −40°C to 115°C. This differs from L-code variants (−40°C to 150°C) and is validated for under-hood locations excluding direct exhaust proximity, such as fuel tank modules or valve cover-mounted PCV sensors.

How does the MLX90821LXG-DBA-008-SP handle fault conditions like open InP/InN lines?

The MLX90821LXG-DBA-008-SP implements broken-track diagnostics that actively drive the analog output to rail voltages (e.g., 0.3 V or 4.7 V clamps) upon detection of open InP or InN connections. These thresholds are factory-set but programmable, enabling ECU-level fault classification without additional external comparators.

Can the MLX90821LXG-DBA-008-SP be reprogrammed for a different pressure range or output curve?

No, the MLX90821LXG-DBA-008-SP is factory-programmed with fixed calibration parameters for its −0.0375 to +0.0125 bar range and inverted 4.5 V → 0.5 V transfer curve. While EEPROM allows limited configuration (e.g., filter settings, clamping), the core pressure span and linearity coefficients are permanently written during final test and cannot be altered in the field.

MLX90821LXG-DBA-008-SP Specifications

Product attributes: Attribute value

Manufacturer:: Melexis Technologies NV

Series:: -

Package/Case:: 16-SOIC (0.295", 7.50mm Width) Exposed Pad

Packaging:: Tube

Product Status:: Active

Applications:: Board Mount

Pressure Type:: -

Operating Pressure:: -0.54PSI ~ 0.18PSI (-3.72kPa ~ 1.24kPa)

Output Type:: Analog Voltage

Output:: 0.5V ~ 4.5V

Accuracy:: ±0.03PSI (±0.2kPa)

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-008-SP FAQ

1.How can I place an order for MLX90821LXG-DBA-008-SP through Aetrix?

Please submit a Request for Quotation (RFQ) for MLX90821LXG-DBA-008-SP 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-008-SP reliable?

The price and inventory of MLX90821LXG-DBA-008-SP 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-008-SP is usually 5 days.

3.What payment methods are accepted for MLX90821LXG-DBA-008-SP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90821LXG-DBA-008-SP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MLX90821LXG-DBA-008-SP?

MLX90821LXG-DBA-008-SP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MLX90821LXG-DBA-008-SP 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-008-SP?

For technical support, including MLX90821LXG-DBA-008-SP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90821LXG-DBA-008-SP requirements.

6.How does Aetrix verify that MLX90821LXG-DBA-008-SP is sourced from the original manufacturer or authorized distributors?

All MLX90821LXG-DBA-008-SP 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-008-SP meets industry standards.

7.What is the process for return or replacement of MLX90821LXG-DBA-008-SP?

All MLX90821LXG-DBA-008-SP units undergo pre-shipment inspection (PSI). If there is an issue with MLX90821LXG-DBA-008-SP, 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-008-SP part is unused and in its original packaging.

Return procedure for MLX90821LXG-DBA-008-SP:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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