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Melexis Technologies NV MLX90821LXG-DBA-100-SP
- Part No.:
- MLX90821LXG-DBA-100-SP
- Manufacturer:
- Melexis Technologies NV
- Category:
- Pressure Sensors, Transducers
- Package:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
MLX90821LXG-DBA-100-SP.pdf
- Description:
- SENSOR 3.77PSID 12BIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,414
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Product details
Overview
MLX90821LXG-DBA-100-SP from Melexis is a factory-calibrated, automotive-grade relative pressure sensor IC delivering digital SENT output (193–3896 LSB) over –0.06 to 0.26 bar range, with ±4.8 mbar total pressure accuracy and integrated diagnostics across –40°C to 150°C. It integrates MEMS sensing element, 16-bit microcontroller, DSP-based compensation, and SENT v4-compliant interface for fuel vapor pressure monitoring in engine control units.
For engineers reviewing the MLX90821LXG-DBA-100-SP datasheet, pinout, applications, or equivalent options, this page delivers verified specifications, functional context, package mapping, real-world use cases, and validated alternative options for automotive pressure sensing design-in.
Technical Context
The MLX90821LXG-DBA-100-SP implements a piezoresistive MEMS sensing element with backside cavity exposure, coupled to a 16-bit differential ADC and DSP-based linearization engine. Its analog front end includes programmable gain instrumentation amplification (Gst1 = 4.49–10.6 V/V), coarse offset DAC, and chopper-stabilized stages enabling sub-millibar resolution.
Digital functionality centers on SENT protocol compliance per SAE J2716 rev 4 (2016), supporting Fast Channel (pressure) and Slow Channel (NTC temperature) transmission. Programmable filters include PFLT (0–9 depth) and SSF, with default PFLT=0 yielding 3 SENT frames response time and 2.2 nF capacitive load tolerance on SENT output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Pressure Range | –0.06 to 0.26 bar relative: supports low-differential fuel vapor and crankcase ventilation monitoring with 0.32 bar full-scale span. |
| Output Format | SENT digital (193–3896 LSB): 12-bit effective resolution, ratiometric to supply, compliant with SAE J2716 rev 4. |
| Accuracy | ±4.8 mbar total pressure error: includes initial, temperature, and long-term drift contributions over –40°C to 150°C. |
| Operating Temp | –40°C to 150°C: qualified for under-hood automotive environments with guaranteed performance and diagnostic coverage. |
| Supply Voltage | 4.5–5.5 V: operates from standard 5 V automotive rail with internal regulators (VDDA = 3.5 V ±9%, Vbrg = 3 V ±9%). |
| Power-Up Time | 1.1 ms to first SENT frame: enables fast system wake-up and synchronization in start-stop engine cycles. |
| Diagnostic Coverage | Built-in clamping, broken-track, over/under-voltage, and over/under-pressure detection: reduces need for external safety monitors. |
Pinout & Package
MLX90821LXG-DBA-100-SP uses SOIC16 WB cavity package (XG code) with backside pressure port and exposed die attach pad for thermal and mechanical robustness in harsh media environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 13, 14, 15, 16 | No Connect | Unused pins; must be left floating or grounded per layout guidelines-no internal connection. |
| 5, 7 | Ground (GND) | Dual GND pins reduce impedance and improve EMC immunity; require low-inductance PCB routing. |
| 6 | NTC Input | Accepts external NTC current output (0–3.5 V range); enables compensated temperature reporting via SENT Slow Channel. |
| 8 | Analog Output | Not used in DBA-100 variant; configured as high-impedance when SENT mode is active. |
| 9 | Supply Input (Vsupply) | Primary power input (4.5–5.5 V); requires 47–100 nF decoupling capacitor close to pin. |
| 11 | SENT Output | Open-drain SENT signal output; requires 10–55 kΩ pull-up to Vdd at receiver per SAE J2716. |
| 10, 12 | Test Pins | Factory programming and diagnostics access; not intended for end-user circuit connection. |
Key Features
| Feature | Design Value |
|---|---|
| SENT v4 Digital Interface | Enables deterministic, noise-immune communication with ECU over single wire; supports Fast Channel (pressure) and Slow Channel (NTC temp) multiplexing. |
| Factory-Calibrated Transfer Curve | Pre-programmed EEPROM stores pressure-to-LSB mapping (193–3896) and clamping levels (1–4088 LSB), eliminating field calibration effort. |
| Programmable Diagnostic Thresholds | Configurable clamping (7-bit low / 9-bit high), broken-track detection, and fault flagging reduce software overhead in safety-critical systems. |
| Backside-Exposed MEMS Cavity | Enables direct media contact with high resistance to fuel vapors, oil mist, and condensates-critical for crankcase and EVAP applications. |
| Automotive EMC Robustness | Optimized CMOS architecture and integrated overvoltage (18 V) / reverse voltage (–14 V) protection meet stringent OEM EMC requirements. |
Applications
| Fuel Vapor Pressure Monitoring | Crankcase Ventilation (PCV) Sensing |
|---|---|
|
Use Scenario: Real-time measurement of evaporative emissions system pressure during leak detection (OBD-II EVAP test). IC Role / Device Role / Timing Role: Primary SENT-output pressure transducer providing calibrated 12-bit pressure data every 10–100 ms to ECU for pressure decay analysis. Use Value: Enables compliance with EPA Tier 3 and Euro 6d evaporative emission standards using single-chip solution with built-in diagnostics. |
Use Scenario: Detection of abnormal crankcase pressure buildup indicating piston ring wear or turbocharger seal failure. IC Role / Device Role / Timing Role: Relative pressure sensor mounted on PCV line, delivering SENT frames synchronized to engine speed for trend analysis. Use Value: Supports predictive maintenance by detecting >0.1 bar deviations from baseline, with temperature-compensated accuracy over full engine operating range. |
| Exhaust Gas Recirculation (EGR) Differential Pressure | Aftertreatment Filter Clogging Detection |
|
Use Scenario: Measuring pressure drop across EGR valve to verify flow rate and detect clogging or sticking. IC Role / Device Role / Timing Role: High-speed SENT interface delivers pressure data with ≤3-frame latency (PFLT=0) for closed-loop EGR control. Use Value: Improves NOx reduction efficiency by enabling precise EGR valve positioning feedback without analog signal conditioning. |
Use Scenario: Monitoring differential pressure across diesel particulate filter (DPF) or gasoline particulate filter (GPF) to trigger regeneration. IC Role / Device Role / Timing Role: Dual-range capable sensor (via reprogramming) used in filter housing to report pressure delta with ±4.8 mbar repeatability. Use Value: Extends filter service life by optimizing regeneration timing and reducing unburned hydrocarbon slip during incomplete regen events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar relative pressure sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP MPXV7025DP | Analog ratiometric output only (0.2–4.8 V); no SENT, no NTC interface, no programmable diagnostics; 2.5% FS accuracy over –40°C to 125°C. | Limited to non-safety-critical analog systems; requires external ADC and fault monitoring circuitry. | Select when cost-sensitive designs accept higher BOM count and reduced diagnostic coverage. |
| Infineon DPS368 | I²C digital output; absolute pressure only (0–126 kPa); ±0.005 kPa accuracy; no automotive qualification or pressure port sealing. | Not suitable for relative pressure or harsh-media automotive use; lacks burst pressure rating (3.75 bar) and clamping diagnostics. | Select only for cabin or ambient pressure sensing where media exposure and automotive qualification are irrelevant. |
Compared with MLX90821LXG-DBA-100-SP, the MPXV7025DP requires external signal conditioning and fault logic, while the DPS368 lacks relative pressure capability, automotive qualification, and media-resistant packaging-making MLX90821LXG-DBA-100-SP the only drop-in solution for SENT-based, media-exposed, safety-aware automotive pressure monitoring.
Availability
MLX90821LXG-DBA-100-SP is available at Aetrix Electronics and suitable for fuel vapor pressure monitoring, crankcase ventilation sensing, and aftertreatment filter clogging detection requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant traceability.
Supply support for MLX90821LXG-DBA-100-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 sensors for automotive and industrial markets, with ISO/TS 16949 certification and deep expertise in MEMS integration.
The MLX90821 product line targets high-reliability automotive pressure sensing, combining MEMS, mixed-signal ASIC, and embedded firmware to replace multi-component analog solutions with single-chip SENT-enabled devices.
FAQ
What output format does the MLX90821LXG-DBA-100-SP use?
The MLX90821LXG-DBA-100-SP delivers a digital SENT output compliant with SAE J2716 rev 4, encoding pressure as 193–3896 LSB over its –0.06 to 0.26 bar range. It does not provide analog output in this variant-pin 8 is high-impedance. The SENT frame includes Fast Channel (12-bit pressure) and optional Slow Channel (NTC temperature), with CRC validation and configurable timing.
Is the MLX90821LXG-DBA-100-SP qualified for automotive use?
Yes, the MLX90821LXG-DBA-100-SP is AEC-Q100 qualified for Grade 0 (–40°C to +150°C), with built-in automotive diagnostics including clamping, broken-track detection, over/under-voltage monitoring, and over/under-pressure flags. Its SOIC16 WB cavity package features backside media exposure and robust sealing suitable for fuel vapor, crankcase oil mist, and exhaust gas environments.
Can the MLX90821LXG-DBA-100-SP measure temperature as well as pressure?
Yes-the MLX90821LXG-DBA-100-SP supports external NTC temperature sensing via pin 6, with compensated ±1°C accurate readings transmitted via SENT Slow Channel. It also reports internal die temperature independently. Both temperature values are factory-calibrated and linearized in the DSP, enabling dual-parameter monitoring without additional components.
What is the pressure accuracy specification for MLX90821LXG-DBA-100-SP?
The MLX90821LXG-DBA-100-SP achieves ±4.8 mbar total pressure accuracy over its full –0.06 to 0.26 bar range and –40°C to 150°C operating temperature. This includes contributions from initial calibration error, temperature-induced drift (Fc = 1, Fe = 1.5), and long-term stability-verified per ISO 26262 ASIL-B readiness documentation and Melexis production test data.
Does MLX90821LXG-DBA-100-SP require external programming or calibration?
No-MLX90821LXG-DBA-100-SP ships fully factory-calibrated with pressure transfer curve, clamping thresholds (1–4088 LSB), and SENT configuration stored in on-chip EEPROM. No external calibration is needed. Programming via the connector is optional and reserved for reconfiguration (e.g., filter settings or diagnostic thresholds), not basic operation.
MLX90821LXG-DBA-100-SP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Melexis Technologies NV
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- Board Mount
- Pressure Type:
- Differential
- Operating Pressure:
- -0.87PSI ~ 3.77PSI (-6kPa ~ 26kPa)
- Output Type:
- SENT
- Output:
- 12 b
- 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-100-SP FAQ
1.How can I place an order for MLX90821LXG-DBA-100-SP through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90821LXG-DBA-100-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-100-SP reliable?
The price and inventory of MLX90821LXG-DBA-100-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-100-SP is usually 5 days.
3.What payment methods are accepted for MLX90821LXG-DBA-100-SP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90821LXG-DBA-100-SP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90821LXG-DBA-100-SP?
MLX90821LXG-DBA-100-SP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90821LXG-DBA-100-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-100-SP?
For technical support, including MLX90821LXG-DBA-100-SP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90821LXG-DBA-100-SP requirements.
6.How does Aetrix verify that MLX90821LXG-DBA-100-SP is sourced from the original manufacturer or authorized distributors?
All MLX90821LXG-DBA-100-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-100-SP meets industry standards.
7.What is the process for return or replacement of MLX90821LXG-DBA-100-SP?
All MLX90821LXG-DBA-100-SP units undergo pre-shipment inspection (PSI). If there is an issue with MLX90821LXG-DBA-100-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-100-SP part is unused and in its original packaging.
Return procedure for MLX90821LXG-DBA-100-SP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MLX90821LXG-DBA-100-SP Tags
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