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NXP Semiconductors MPX4250A
- Part No.:
- MPX4250A
- Manufacturer:
- NXP Semiconductors
- Category:
- Pressure Sensors, Transducers
- Package:
- 6-SIP Module
- Datasheet:
-
MPX4250A.pdf
- Description:
- SENSOR 29.01PSIA 4.9V
- Quantity:
- Payment:
- Shipping:
Inventory:3,405
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Product details
Overview
MPX4250A from NXP Semiconductors is a manifold absolute pressure (MAP) sensor with on-chip signal conditioning, temperature compensation, and factory calibration. It measures 20–250 kPa absolute pressure, delivers ratiometric analog output (VOUT = VCC × (P × 0.004 – 0.04)), operates from –40 °C to +125 °C, and is packaged in a durable epoxy unibody case (Case 867-08). It serves as the primary air mass estimator in engine control units for fuel injection timing.
For engineers reviewing the MPX4250A datasheet, MPX4250A pinout, MPX4250A application, or MPX4250A equivalent, key selection criteria include its ±1.5 % full-scale accuracy over 0 °C to 85 °C, 1.0 ms response time, 7–10 mA supply current, unibody package mechanical robustness, and compatibility with 5.1 V ±0.25 V excitation in microcontroller-based A/D systems.
Technical Context
The MPX4250A integrates a monolithic silicon piezoresistive sensing element with thin-film metallization and bipolar signal conditioning circuitry. Its architecture includes two gain stages, on-chip temperature compensation across –40 °C to +125 °C, and a ground-reference shift circuit - all implemented in a single die within an epoxy unibody housing.
It uses a patented silicon shear-stress strain gauge design and features a sealed vacuum reference cavity. The output is ratiometric to VCC, with offset stability of ±0.5 %VFSS after 1000-hour pulsed pressure/temperature cycling, and full-scale span of 4.692 V at 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Pressure Range | 20–250 kPa absolute; enables precise intake manifold pressure measurement for stoichiometric air–fuel ratio calculation. |
| Output Type | Ratiometric analog voltage (VOUT); scales linearly with VCC, simplifying A/D conversion in 5 V microcontroller systems. |
| Accuracy | ±1.5 %VFSS over 0 °C to 85 °C; covers linearity, TcOffset, TcSpan, and hysteresis error components per spec. |
| Response Time | 1.0 ms (10–90%); supports real-time transient engine load tracking without output lag. |
| Supply Voltage | 4.85–5.35 Vdc; compatible with standard automotive 5 V regulators and tolerant of nominal rail variation. |
| Operating Temp | –40 °C to +125 °C; qualified for under-hood automotive environments without external thermal management. |
| Sensitivity | 20 mV/kPa; yields ~4.7 V full-scale swing across 250 kPa range, maximizing ADC resolution utilization. |
Pinout & Package
Epoxy unibody package (Case 867-08, 98ASB42793B), surface-mountable with stainless steel cover and fluorosilicone gel isolation for environmental protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Analog output voltage | Delivers conditioned, temperature-compensated voltage proportional to applied pressure; requires 470 pF capacitor to GND per recommended decoupling. |
| GND (Pin 2) | Signal and power ground | Common return path for supply and output; must be low-impedance to avoid noise coupling into sensitive analog output. |
| VCC (Pin 3) | Positive supply input | Accepts 4.85–5.35 Vdc; powers internal transducer and signal chain; output scales directly with this rail. |
| DNC (Pin 4) | Do not connect | No internal connection; must remain floating - no tie to GND, VCC, or PCB traces. |
| DNC (Pin 5) | Do not connect | No internal connection; must remain floating - no tie to GND, VCC, or PCB traces. |
| DNC (Pin 6) | Do not connect | No internal connection; must remain floating - no tie to GND, VCC, or PCB traces. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip temperature compensation | Validated over –40 °C to +125 °C; eliminates need for external thermistor networks or software correction tables. |
| Patented silicon shear-stress strain gauge | Enables high repeatability and low hysteresis (<0.5 %VFSS) across pressure cycles and thermal stress. |
| Unibody epoxy construction | Provides mechanical ruggedness and moisture resistance superior to hybrid modules; suitable for direct mounting on intake manifolds. |
| Ratiometric output | Removes sensitivity to VCC drift; allows use of same regulator for both MCU and sensor, reducing BOM count and layout complexity. |
| Factory-calibrated transfer function | Delivers known VOUT = VCC × (P × 0.004 – 0.04) ± error; enables plug-and-play integration without system-level calibration. |
Applications
| Engine Control Unit (ECU) | Turbo Boost Monitoring |
|---|---|
Use Scenario: Real-time measurement of intake manifold absolute pressure during variable valve timing and cylinder deactivation events. IC Role / Device Role / Timing Role: Primary MAP sensor feeding closed-loop air mass estimation to fuel injection algorithm. Use Value: Enables sub-2% air–fuel ratio deviation across wide RPM/load ranges due to ±1.5% VFSS accuracy and 1.0 ms response. |
Use Scenario: Dynamic pressure tracking in forced-induction engines where boost pressure exceeds atmospheric by up to 150 kPa above ambient. IC Role / Device Role / Timing Role: Absolute pressure reference for turbocharger wastegate actuation and knock suppression logic. Use Value: Maintains stable output under rapid transients (e.g., throttle snap) thanks to fast warm-up time (20 ms) and minimal offset drift. |
| Industrial Air Compressor Control | Medical Ventilator Pressure Sensing |
Use Scenario: Monitoring discharge pressure in oil-free rotary screw compressors requiring continuous 24/7 operation with zero calibration drift. IC Role / Device Role / Timing Role: Primary feedback sensor for PID-controlled pressure regulation loop. Use Value: Delivers ±0.5% VFSS offset stability after 1000-hour reliability testing, reducing recalibration intervals. |
Use Scenario: Measuring patient airway pressure in critical-care ventilators where accuracy below 1 kPa impacts tidal volume delivery. IC Role / Device Role / Timing Role: Absolute pressure transducer in breath-by-breath pressure support mode. Use Value: Provides traceable 20–250 kPa range with <1.0 ms latency, meeting IEC 60601-2-12 response requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar manifold absolute pressure sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPXA4250A6U | Small outline package (Case 482-01), 8-pin SOP; pins 1,5–8 are DNC; VCC/GND/VOUT on pins 2/3/4. | Designed for PCB space-constrained designs; lacks unibody mechanical robustness but offers easier rework and automated assembly. | Select when board area is limited and environmental sealing is handled externally. |
| MPX5700AP | Wider 0–700 kPa range; ±2.0% VFSS accuracy; same unibody package (Case 867B-04); 5.0 V supply. | Supports higher-boost turbo engines and industrial vacuum/pressure dual-range systems; lower accuracy tolerance. | Select when measuring beyond 250 kPa is required and ±2.0% error budget is acceptable. |
Compared with MPX4250A, MPXA4250A6U trades mechanical ruggedness for SMT manufacturability, while MPX5700AP extends pressure range at the cost of accuracy - making MPX4250A optimal for cost-sensitive, high-reliability 20–250 kPa automotive MAP applications.
Availability
MPX4250A is available at Aetrix Electronics and suitable for engine control units, turbo boost monitoring systems, and industrial compressor control requiring stable component supply with automotive-grade qualification and long-term lifecycle support.
Supply support for MPX4250A 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
NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Freescale's sensor legacy.
The MPX4250A belongs to NXP's integrated silicon pressure sensor family, engineered specifically for high-accuracy, temperature-stable absolute pressure measurement in harsh under-hood environments.
FAQ
What is the operating temperature range of the MPX4250A?
The MPX4250A operates from –40 °C to +125 °C, with full electrical specifications guaranteed over 0 °C to 85 °C. Its on-chip temperature compensation ensures stable output across this entire range, making it suitable for under-hood automotive deployment without external thermal shielding. The MPX4250A maintains ±1.5% VFSS accuracy within the 0–85 °C band and retains functional integrity up to +125 °C.
Does the MPX4250A require external calibration?
No, the MPX4250A is factory-calibrated and fully temperature-compensated, delivering a known transfer function VOUT = VCC × (P × 0.004 – 0.04) ± error. No system-level calibration is needed for standard applications. The MPX4250A achieves ±1.5% VFSS accuracy out-of-box, eliminating post-solder calibration steps and reducing production test time.
What is the recommended decoupling network for the MPX4250A?
NXP specifies a three-capacitor decoupling network: 1.0 µF (bulk), 0.01 µF (mid-frequency), and 470 pF (high-frequency) between VCC and GND, placed as close as possible to the MPX4250A pins. This configuration meets all electrical specifications, including response time and noise immunity. The MPX4250A output also benefits from the 470 pF capacitor to GND shown in Figure 5 of the datasheet.
Can the MPX4250A be used with a 3.3 V microcontroller system?
The MPX4250A requires a 4.85–5.35 V supply and is not rated for 3.3 V operation. Its ratiometric output is referenced to VCC, so using it with a 3.3 V MCU would require a dedicated 5.1 V regulator for the MPX4250A and level-shifting or scaling of the 0.2–4.9 V output to match the MCU's 3.3 V ADC range. The MPX4250A itself must be powered at 5.1 V ±0.25 V to meet datasheet performance.
What does "DNC" mean for pins 4–6 on the MPX4250A?
"DNC" stands for "Do Not Connect." Pins 4, 5, and 6 on the MPX4250A unibody package have no internal connection and must remain electrically floating - they must not be tied to GND, VCC, or any PCB trace. Connecting them risks unpredictable behavior or damage. This is explicitly defined in Table 2 of the MPX4250A datasheet and applies only to the unibody variant (MPX4250A), not the SOP MPXA4250A series.
MPX4250A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- MPX4250A
- Package/Case:
- 6-SIP Module
- Packaging:
- Tray
- Product Status:
- Obsolete
- Applications:
- Board Mount
- Pressure Type:
- Absolute
- Operating Pressure:
- 2.9PSI ~ 29.01PSI (20kPa ~ 200kPa)
- Output Type:
- Analog Voltage
- Output:
- 0.2 V ~ 4.9 V
- Accuracy:
- ±1.5%
- Voltage - Supply:
- 4.85V ~ 5.35V
- Port Size:
- -
- Port Style:
- No Port
- Features:
- Temperature Compensated
- Termination Style:
- PC Pin
- Maximum Pressure:
- 145.04PSI (1000kPa)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- -
MPX4250A FAQ
1.How can I place an order for MPX4250A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPX4250A 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 MPX4250A reliable?
The price and inventory of MPX4250A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPX4250A is usually 5 days.
3.What payment methods are accepted for MPX4250A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPX4250A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPX4250A?
MPX4250A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPX4250A 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 MPX4250A?
For technical support, including MPX4250A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPX4250A requirements.
6.How does Aetrix verify that MPX4250A is sourced from the original manufacturer or authorized distributors?
All MPX4250A 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 MPX4250A meets industry standards.
7.What is the process for return or replacement of MPX4250A?
All MPX4250A units undergo pre-shipment inspection (PSI). If there is an issue with MPX4250A, 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 MPX4250A part is unused and in its original packaging.
Return procedure for MPX4250A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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