MPX4250AP - 250 kPa Absolute Pressure Sensor | NXP | 6-SIP
MPN： MPX4250AP ✓ 啟用中MPX4250AP 概覽
An absolute pressure sensor is a transducer that converts applied pressure (with an internal vacuum reference) into a calibrated analog voltage proportional to absolute pressure rather than gauge pressure. As a member of the MAP sensor family, it sits within the broader pressure sensor -> sensor -> transducer hierarchy and is commonly integrated into engine control units (ECUs), industrial pneumatic controllers, and barometric instrumentation.
Key features include a 20 kPa to 250 kPa (2.9 psi to 36.26 psi) absolute pressure range, 5.0 V nominal supply, ratiometric 0.2 V to 4.9 V analog output, on-chip temperature compensation across -40C to +125C, and EMC robustness for automotive electrical environments. The integrated signal chain eliminates the need for external op-amps or trims.
The MPX29951 family uses a piezoresistive silicon strain gauge on a diaphragm. When pressure deflects the diaphragm, the integrated Wheatstone bridge produces a differential voltage that is amplified, temperature-compensated and calibrated on-chip to produce a linear, ratiometric output (VOUT/VCC proportional to P/PIN). This produces a robust, calibrated analog signal directly usable by an MCU ADC without further linearization.
Typical applications include automotive engine manifold absolute pressure sensing for fuel injection control, barometric pressure compensation, industrial vacuum measurement, HVAC pressure monitoring, and altitude correction in motorcycle/powersport ECUs. The wide 20-250 kPa range covers naturally aspirated and moderately boosted engines.
When designing with this sensor, observe the tube inlet geometry (0.19 inch / 4.93 mm OD) and avoid sharp bends that could cause turbulence. Apply a 5.0 V regulated supply and decouple with a 100 nF capacitor near the VCC pin. Mount away from heat sources such as exhaust manifolds to limit thermal drift.
This page synthesizes distributor pricing, drop-in same-package alternatives from the NXP MPX family and cross-brand references from Honeywell/SSI, plus practical design notes not assembled in any single manufacturer datasheet.
直接替換替代品，適用於 MPX4250AP — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MPX4250AP （相同外形與佔位） — 差異在於 Mounting Type, Operating Temperature, Output Type, Output Voltage Range, On-Chip Signal Conditioning.
MPX4250A
✅ 直接替換聯絡詢價
查看資料表 →MPX4250GP
✅ 直接替換聯絡詢價
查看資料表 →MPX4250AP
✅ 直接替換聯絡詢價
查看資料表 →MPX4250AF
✅ 直接替換📋 參考替代品（不在目錄中）
MPXA4250A
✅ 直接替換📋 參考替代品（不在目錄中）
MPX4250AP 最大額定值與電氣特性
| Pressure Type | Absolute (Manifold Absolute Pressure) |
| Pressure Range | 20 kPa to 250 kPa (2.9 psi to 36.26 psi) |
| Pressure Range - Barometric Reference | 0 kPa to 250 kPa absolute (internal vacuum reference) |
| 供應電壓 | 5.0 V nominal (4.85 V to 5.35 V ratiometric) |
| 輸出類型 | Analog, ratiometric |
| 輸出電壓範圍 | 0.2 V to 4.9 V |
| Full-Scale Span (VFSO) | 4.6 V typical |
| Sensitivity | Approx. 20 mV/kPa (linear, ratiometric) |
| 工作溫度 | -40C to +125C |
| 封裝 | 6-SIP Module (6-pin SIP, through-hole, tube inlet) |
| Tube Inlet | Male 0.19 inch (4.93 mm) outer diameter |
| Port Style | Single axial tube port (barbed for 4.93 mm tube) |
| 安裝類型 | Through-Hole SIP, PCB vertical mount |
| 腳位數 | 6 (4 functional + 2 NC pins) |
| On-Chip Signal Conditioning | Yes (amplified, calibrated, temperature-compensated) |
| Lead-Free | Yes (per datasheet ordering information) |
MPX4250AP 腳位配置
| 腳位 1 | VCC — 5 V supply input (ratiometric reference) |
| 腳位 2 | GND — Ground reference |
| 腳位 3 | VOUT — Analog ratiometric output voltage (0.2 V to 4.9 V) |
| 腳位 4 | NC — Not connected (no internal bond) |
| 腳位 5 | NC — Not connected (no internal bond) |
| 腳位 6 | NC — Not connected (no internal bond) |
典型應用
MPX4250AP 適用於 6 應用s: Engine Manifold Absolute Pressure (MAP) Sensing, Barometric Pressure Compensation, Industrial Vacuum Measurement, HVAC Pressure Monitoring, Altitude Correction for Motorcycles and Powersport ECUs, Pneumatic Pressure Monitoring for Process Automation.
Engine Manifold Absolute Pressure (MAP) Sensing
The MPX4250AP is the de facto standard MAP sensor for port-fuel-injection ECUs in automotive and powersport applications. Its 20-250 kPa absolute range covers naturally aspirated and mildly boosted engines up to approximately 1.7 bar absolute, and the ratiometric 0.2-4.9 V output cancels supply ripple in the ADC reading. Plumbed into the intake manifold via the 0.19 inch tube inlet, the sensor feeds the ECU's speed-density calculation, enabling precise fuel injector pulse width control across all operating conditions per the NXP datasheet application circuit.
推薦
Barometric Pressure Compensation
The MPX4250AP's wide 20-250 kPa absolute range makes it ideal for barometric pressure measurement in portable weather stations and altitude-correction systems. Its internal vacuum reference means no second sensor is needed; the ratiometric 5 V supply interface allows direct ADC sampling by an embedded MCU. Conformal-coated variants are commonly mounted in weatherproof enclosures, and per the datasheet temperature compensation, the sensor delivers stable readings across -40C to +125C.
推薦
Industrial Vacuum Measurement
For industrial vacuum systems in the 20-250 kPa absolute range, the MPX4250AP provides a low-cost analog pressure transmitter solution. The 6-SIP package mounts on a PCB inside an enclosure, with the 4.93 mm tube inlet connected to the vacuum line via flexible tubing. Its on-chip temperature compensation reduces drift versus discrete transducers, and the 0.2-4.9 V output interfaces directly with 5 V PLC analog input modules per the NXP MPX4250 datasheet reference designs.
推薦
HVAC Pressure Monitoring
In HVAC systems, the MPX4250AP monitors refrigerant line pressures when operating in the 20-250 kPa absolute range (typical for low-side refrigerant circuits). The ratiometric 0.2-4.9 V output feeds a controller ADC, enabling safety shutoffs when pressures drift. Per the datasheet, the -40C to +125C operating range tolerates rooftop unit thermal cycling.
推薦
Altitude Correction for Motorcycles and Powersport ECUs
The MPX4250AP is widely used in aftermarket ECUs (Speeduino, rusEFI, Megasquirt) for altitude compensation of fuel maps. Its absolute pressure reference allows the ECU to subtract barometric from manifold pressure readings and compute true boost above ambient. The 6-SIP through-hole package with axial port fits inside an IP-rated enclosure with hose barb fittings, and the 0.2-4.9 V output is sampled by the MCU ADC at up to 1 kHz for fast transient response per NXP reference circuits.
推薦
Pneumatic Pressure Monitoring for Process Automation
The MPX4250AP monitors compressed air line pressures in the 20-250 kPa range used by pneumatic actuators and control systems in factory automation. Its on-chip calibration eliminates per-unit trimming in volume production, and the ratiometric output interfaces directly with industrial 5 V/6 V analog input modules. Per the NXP datasheet, the integrated signal conditioning delivers 1.5% typical accuracy over the full operating range.
推薦
推薦產品摘要
工程參考資料，適用於 MPX4250AP — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MPX4250A | MPX4250GP | MPXA4250A |
|---|---|---|---|---|
| Package | 6-SIP Module (axial tube) | 6-SIP Module - same | 6-SIP Module - same | 6-SOP Module - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Pressure Type | Absolute (Manifold) | Absolute | Gauge (side-port) | Absolute |
| Pressure Range | 20 kPa to 250 kPa | 20 kPa to 250 kPa | 20 kPa to 250 kPa | 20 kPa to 250 kPa |
| Output Range | 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 |
| Supply Voltage | 5.0 V nominal | 5.0 V nominal | 5.0 V nominal | 5.0 V nominal |
| Port Style | Axial tube (0.19 inch) | No port (unported) | Side gauge port | Axial tube |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
| On-Chip Signal Conditioning | Yes (calibrated) | Yes | Yes | Yes |
主要差異化特點
- Standardized 6-SIP MPX pinout (對比Honeywell SSCSHNN030PAAA5)
- True absolute reference (vs gauge) (對比MPX4250GP)
- Wide pressure range to 250 kPa (對比Honeywell SSCSHNN030PAAA5)
設計說明
Power the MPX4175AP from a low-noise 5.0 V regulator. Add a 100 nF ceramic decoupling capacitor within 5 mm of the VCC pin (Pin 1) and a 10 uF bulk capacitor on the supply rail. The output is ratiometric, so any ripple on VCC appears proportionally at VOUT; use an LDO rather than a switching regulator to avoid ADC reference noise. Reference: NXP MPX4250 datasheet power supply section.
Mount the MPX4250AP vertically on the edge of the board with the tube inlet extending off-board. Keep the tube path straight for at least 20 mm to avoid turbulence; use flexible silicone tubing with barb fittings sized for the 0.19 inch (4.93 mm) OD. Avoid locating the sensor near heat sources such as exhaust manifolds or power transistors; thermal gradients shift the calibrated output per the datasheet thermal compensation curve.
Route the VOUT trace as a short analog path away from digital lines and switching nodes. Add an RC low-pass filter (10 kohm + 100 nF, fc approximately 160 Hz) if the application requires noise rejection beyond the sensor's own bandwidth. Per the NXP datasheet, the sensor output is buffered on-chip, but EMI from injectors or coils can still couple into long PCB traces.
Do not connect the NC pins (Pins 4, 5, 6) to any signal; per the NXP datasheet, these have no internal bond and may float. Do not exceed 5.35 V on VCC; the on-chip amplifier is not rated above 6 V and may permanently damage the sensor. Do not apply pressure above 400 kPa - the diaphragm may yield and permanently shift calibration.
合規資訊
RoHS/REACH compliance confirmed per NXP product page. AEC-Q100 not applicable for non-automotive-qualified MAP sensor family; the MPX4250A series targets industrial and aftermarket ECU markets. Refer to NXP MPX4250 datasheet for material composition.
