MPXA4250A6U - 20-250 kPa MAP Absolute Pressure Sensor | NXP
N.º de pieza: MPXA4250A6U ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $18.5 | $18,50 |
| 10 | $16.2 | $162,00 |
| 100 | $14.05 | $1.405,00 |
| 500 | $12.4 | $6.200,00 |
| 1.000 | $10.95 | $10.950,00 |
MPXA4250A6U Descripción general
What is a MAP sensor? A Manifold Absolute Pressure sensor is a piezoresistive transducer used in engine control units to measure absolute air pressure inside the intake manifold. The measurement is fed into the ECU to compute the required fuel quantity per cylinder; it sits inside the broader sensor hierarchy of pressure sensor -> piezoresistive transducer -> MEMS sensor -> semiconductor IC. The MPXA4250A6U integrates a monolithic silicon strain-gauge bridge with laser-trimmed thin-film resistors, so no external op-amp or temperature-compensation network is required.
Key specifications include a supply voltage range of 4.85 V to 5.35 V (5 V nominal), an analog output swing of 0.2 V to 4.9 V (approximately 20 mV/kPa sensitivity), an operating temperature range of -40 C to +125 C, and a response time of 1.0 ms. The full-scale accuracy is approximately +/-1.5% over the compensated temperature range, which is sufficient for closed-loop fuel control without per-unit calibration.
At the architecture level the device uses a single-chip piezoresistive Wheatstone bridge diffused into a silicon diaphragm, with the diaphragm deflection proportional to applied pressure. The on-chip ASIC conditions, compensates, and calibrates the bridge output so the user receives a ratiometric analog voltage that is linear over 20 kPa to 250 kPa. Unlike bare-bones bridge sensors, the integrated ASIC eliminates the need for external temperature lookup tables, reducing MCU firmware overhead and BOM cost.
Typical applications include automotive engine management (MAP sensing for gasoline port injection and GDI engines), turbocharger boost monitoring, motorcycle and small-engine ECUs, and industrial vacuum/pressure monitoring where the 5 V single-rail analog interface is convenient. The wide 250 kPa full-scale accommodates naturally aspirated and moderately boosted engines.
When designing with the MPXA4250A6U, place a 0.01 uF decoupling capacitor close to the supply pin and add a small RC low-pass filter on Vout if the ADC sample rate is high relative to the 1 ms response. The pressure port must use the correct O-ring and manifold geometry to avoid hysteresis and pressure drop.
This page synthesizes drop-in same-package alternatives (MPXA4250A6T1, MPXA4250AC6U, MPXA4250AC6T1), cross-references the lower-pressure MPXAZ4115A6U, and adds thermal and PCB layout notes not found in the manufacturer datasheet.
Alternativas directas para MPXA4250A6U — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con MPXA4250A6U (mismo factor de forma y huella) — difiere en Output Type, Pressure Type, Sensitivity, Operating Pressure Range, Output Voltage Range.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MPXA4250A6T1
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MPXA4250AC6U
✅ Sustitución directa✓ En stock
$9.4 / unidad
Ver hoja de datos →MPXA4250AC6T1
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$5.88 / unidad
Ver hoja de datos →MPX4250A
✅ Sustitución directa✓ En stock
$8.95 / unidad
Ver hoja de datos →MPXA4250GP
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
MPXA4250A6U Valores máximos y características eléctricas
| Pressure Type | Absolute (Manifold Absolute Pressure, MAP) |
| Operating Pressure Range | 20 kPa to 250 kPa (2.9 PSI to 36.26 PSI) |
| Tensión de alimentación | 4.85 V to 5.35 V (5 V nominal) |
| Analog Output Range | 0.2 V to 4.9 V |
| Sensitivity | 20 mV/kPa (nominal) |
| Accuracy | +/-1.5% (0 C to 85 C compensated) - datasheet figure |
| Response Time | 1.0 ms (typical) |
| Temperatura de funcionamiento | -40 C to +125 C |
| Compensated Temperature Range | 0 C to +85 C (typical automotive) |
| Encapsulado | 8-SMD Module (gull-wing, surface mount) |
| Tipo de montaje | Surface Mount |
| Termination Style | PCB (gull-wing leads) |
| Tipo de salida | Analog Voltage (ratiometric to Vsupply) |
| Port Style | Vertical / axial port (A6 suffix = single port, top mount) |
| Estado RoHS | Compliant |
Configuración de pines de MPXA4250A6U
| Pin 1 | Vsupply — 5 V supply input (4.85 V to 5.35 V) |
| Pin 2 | GND — Ground reference |
| Pin 3 | Vout — Analog ratiometric output, 0.2 V to 4.9 V (20 mV/kPa) |
| Pin 4 | NC — Not connected (per datasheet) |
| Pin 5 | NC — Not connected (per datasheet) |
| Pin 6 | NC — Not connected (per datasheet) |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | NC — Not connected (per datasheet) |
Aplicaciones típicas
MPXA4250A6U es adecuado para 7 aplicacións: Automotive Engine MAP Sensing, Turbocharger Boost Monitoring, Motorcycle and Small-Engine ECU, Industrial Vacuum and Process Pressure Monitoring, Barometric / Altitude Reference Sensor, HVAC and Refrigeration Diagnostics, Drones and UAV Altitude Hold.
Automotive Engine MAP Sensing
The MPXA4250A6U's 20-250 kPa full-scale range and 20 mV/kPa sensitivity make it the de-facto MAP sensor for gasoline port-fuel-injection (PFI) and naturally aspirated engine ECUs. Plumbed into the intake manifold between the throttle body and the head, its 0.2-4.9 V ratiometric output feeds the ECU's 10-bit or 12-bit ADC to compute air mass via the speed-density equation. The +/-1.5% accuracy (0 C to 85 C compensated) and 1 ms response time keep transient fueling accurate across WOT pulls, while the ratiometric output lets the ECU share its 5 V reference without gain error.
Recomendado
Turbocharger Boost Monitoring
On lightly boosted engines (up to ~15 PSI or ~250 kPa absolute), the MPXA4250A6U can sense post-compressor boost pressure directly when the application stays within the 20-250 kPa window. The on-chip ASIC conditioning eliminates the need for a separate instrumentation amp, so the sensor output drives an op-amp buffer (TLV9062 or similar rail-to-rail op-amp) before the ECU ADC. Use a stainless-steel manifold fitting and pulse damping to keep pressure pulsations from the turbo compressor within the 1 ms response band.
Recomendado
Motorcycle and Small-Engine ECU
Small-displacement motorcycle, marine outboard, and lawn-equipment ECUs use the MPXA4250A6U in the same 5 V ratiometric configuration as automotive, but at lower production volumes. The 8-SMD gull-wing module fits inside a sealed waterproof housing, and the on-chip temperature compensation removes the burden of per-engine lookup tables. Because the supply can dip during cranking, place a 100 uF bulk + 0.1 uF bypass right at the sensor pins.
Recomendado
Industrial Vacuum and Process Pressure Monitoring
Beyond automotive, the MPXA4250A6U's 20-250 kPa absolute range covers vacuum-pack sealing machines, HVAC duct static pressure, and industrial vacuum-furnace monitoring. Its 4.85-5.35 V supply compatibility with most 5 V industrial PLC analog-input cards simplifies integration; the 0.2-4.9 V output can drive a 0-5 V ADC channel directly with no instrumentation amplifier. The -40 C to +125 C operating envelope supports both freezer-room cold and hot-process applications.
Recomendado
Barometric / Altitude Reference Sensor
While the MPXAZ4115A6U is more commonly used for barometric reference (15-115 kPa covers sea level to mountain altitude), the MPXA4250A6U can serve in wide-range altitude logger or meteorological applications where pressure events above 115 kPa must also be captured (e.g., weather balloons descending into positive-pressure vessels). For pure barometric work choose the MPXAZ4115A6U because its smaller span gives better resolution over the typical 95-105 kPa weather band.
Recomendado
HVAC and Refrigeration Diagnostics
Field-service technicians use the MPXA4250A6U in diagnostic manifolds to sense refrigerant suction and discharge pressures where the absolute range covers typical R-134a and R-410A high-side values. The 1 ms response time captures compressor cycling, and the integrated signal conditioning removes the need for technician-level zero/span adjustments. A handheld diagnostic tool can read the 0.2-4.9 V output directly through a 12-bit ADC and display pressure in PSI or kPa.
Recomendado
Drones and UAV Altitude Hold
Multi-rotor drones use the MPXA4250A6U in the same 5 V ratiometric configuration, feeding the flight controller's ADC for altitude-hold and barometric backup; the 20 mV/kPa sensitivity gives about 0.5 m resolution. Because the drone 5 V rail is shared with high-current ESCs, add a 10 ohm + 10 uF RC filter at the sensor input to keep motor switching noise out of the analog output. This adds the sensor range to cover fast descending pressure transients without clipping.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MPXA4250A6U — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MPXA4250A6T1 | MPXA4250AC6U | MPXA4250AC6T1 | MPX4250A | MPXA4250GP |
|---|---|---|---|---|---|---|
| Package | 8-SMD Module (gull-wing, A6 port) | 8-SMD Module (gull-wing, A6 port) - same | 8-SMD Module (gull-wing, A6 port) - same | 8-SMD Module (gull-wing, A6 port) - same | 8-SMD Module (gull-wing, unported) - same footprint | 8-SMD Module (gull-wing, gage ported) - same footprint |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Pressure Range | 20 to 250 kPa (2.9 to 36.26 PSI) | 20 to 250 kPa | 20 to 250 kPa | 20 to 250 kPa | 20 to 250 kPa | 20 to 250 kPa |
| Supply Voltage | 4.85 V to 5.35 V | 4.85 V to 5.35 V | 4.85 V to 5.35 V | 4.85 V to 5.35 V | 4.85 V to 5.35 V | 4.85 V to 5.35 V |
| Analog Output | 0.2 V to 4.9 V (ratiometric) | 0.2 V to 4.9 V | 0.2 V to 4.9 V | 0.2 V to 4.9 V | 0.2 V to 4.9 V | 0.2 V to 4.9 V |
| Sensitivity | 20 mV/kPa | 20 mV/kPa | 20 mV/kPa | 20 mV/kPa | 20 mV/kPa | 20 mV/kPa |
| Packaging | Tube | Tape & Reel | Tray | Tray + Tape & Reel | Tube | Tube |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C |
| Pressure Port | Axial top-mount (A6) | Axial top-mount (A6) | Axial top-mount (A6) | Axial top-mount (A6) | Unported (bare element) | Gage ported (GP) |
Diferenciadores clave
- Single drop-in family with 5 voltage variants (frente a MPXAZ4115A6U)
- Industry-standard port-package options (frente a MPXHZ6250A6U)
- On-chip calibration eliminates per-unit trim (frente a Honeywell SSCDANN015PGAA5)
Notas de diseño
Power the MPXA4250A6U from a clean 5 V rail; on automotive 12 V systems add a TPS7A4533 LDO between battery and the sensor supply pin. Place a 0.1 uF X7R bypass capacitor directly across pins 1 and 2 (Vsupply/GND) within 5 mm of the package. For crank-survival, add a 10 uF bulk + 100 uF aluminum polymer on the supply net. The sensor draws only a few mA (exact value in [DATA_NEEDED: supply current typical/max]), so a small ferrite bead on Vsupply reduces conducted EMI from the ECU.
Do not route the analog output trace near switching nodes (DC-DC converters, ignition coils, motor drivers) - the high-impedance 0.2-4.9 V output is sensitive to capacitive coupling. Keep the Vout trace short, guard it with ground on both sides, and add a 100 ohm series resistor + 100 nF cap to form a 16 kHz LPF that suppresses ignition-coil ringing. The pressure-port O-ring must be fluorocarbon (FKM/Viton) rated for the working fluid; using a silicone O-ring causes long-term drift and calibration shift.
Estimated: design the manifold port with a 2 mm minimum diameter, a 1 mm orifice restriction, and a 45 degree tapered entry to minimize turbulence and pressure drop at 25 kPa full-scale flow. Mount the sensor vertically (port up) to prevent condensate pooling. The 8-SMD module has a thermal pad on the underside - solder it to a copper pour equal to or larger than the package to keep the internal ASIC within its -40 C to +125 C envelope under hood-soak conditions.
The output is ratiometric to Vsupply, so use the same 5 V reference for the ECU ADC as for the sensor supply; this cancels supply-noise gain error. If a separate ADC reference must be used (e.g., 3.3 V MCU with 5 V sensor), scale the ratiometric output through a resistor divider and verify the divider does not load the sensor output stage. The MPXA4250A6U output is specified to drive 1 mA typical; check the exact load-driving capability against the divider input impedance.
Información de cumplimiento
RoHS compliant per DigiKey product listing. Halogen-free status varies by date code - confirm with NXP for the latest date codes. AEC-Q100 qualification status is [DATA_NEEDED: AEC-Q100 grade] in the verified web data; the MPX4250A family is widely used in automotive ECUs.
