MPX4250GP - 250kPa Vented Gauge Pressure Sensor | NXP Semiconductors
MPN： MPX4250GP ✓ 啟用中MPX4250GP 概覽
A vented-gauge pressure sensor is a transducer that converts an applied pressure (relative to a vented reference, typically atmosphere) into an electrical signal; the silicon die uses piezoresistive strain gauges whose resistance changes with membrane deflection. Modern integrated pressure sensors like the MPX4250GP place the strain-gauge bridge, signal amplifier, temperature-compensation network, and calibration EEPROM on a single monolithic die, eliminating the external compensation circuit required by earlier raw-bridge sensors. In a typical engine-control ECU the device sits downstream of the inlet manifold, providing one of two key inputs (the other being air temperature) to the speed-density air-mass calculation.
Key features include 0.2 V to 4.9 V ratiometric output, 18.8 mV/kPa sensitivity, 0 to 250 kPa (36.26 PSI) operating range, and integrated ASIC signal conditioning. The package is a 6-pin SIP (Single Inline Package) module with a vertical port for tube-mounting and a barbed pressure inlet.
Typical applications include automotive manifold absolute pressure (MAP) sensing, turbo boost pressure monitoring, industrial process pressure measurement, and HVAC duct pressure sensing. The wide 0-250 kPa range supports both naturally aspirated and boosted engines.
When designing with this device, ensure the 5V supply is well-regulated, decouple VCC with 100 nF ceramic close to the pin, and protect the port from water and debris ingress; the vented-gauge design requires the rear vent to remain unobstructed for accurate atmospheric reference.
直接替換替代品，適用於 MPX4250GP — 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： MPX4250GP （相同外形與佔位） — 差異在於 Mounting Type, Supply Voltage, Output Voltage Range, Operating Temperature, Operating Pressure Range.
MPX4250DP
✅ 直接替換聯絡詢價
查看資料表 →MPX4250A
✅ 直接替換聯絡詢價
查看資料表 →MPX5500DP
✅ 直接替換聯絡詢價
查看資料表 →MPX4250GP 最大額定值與電氣特性
| Manufacturer | NXP Semiconductors |
| Pressure Type | Vented Gauge |
| Operating Pressure Range | 0 kPa to 250 kPa (0 to 36.26 PSI) |
| 輸出類型 | Analog, Ratiometric |
| 輸出電壓範圍 | 0.2 V to 4.9 V |
| Sensitivity | 18.8 mV/kPa (nominal) |
| 供應電壓 | 4.85 V to 5.35 V |
| 工作溫度 | -40C to +125C |
| Port Size | 0.19 inch (4.93 mm) male tube / barbed |
| 封裝 | 6-SIP Module (6-pin Single Inline Package) |
| 安裝類型 | Through-hole SIP module |
| Compensation | On-chip temperature compensated and calibrated |
MPX4250GP 腳位配置
| 腳位 1 | VCC — +5 V supply voltage |
| 腳位 2 | VOUT — Analog ratiometric pressure output (0.2 V to 4.9 V) |
| 腳位 3 | GND — Ground return |
| 腳位 4 | N/C — Not connected (per datasheet) |
| 腳位 5 | N/C — Not connected (per datasheet) |
| 腳位 6 | N/C — Not connected (per datasheet) |
典型應用
MPX4250GP 適用於 6 應用s: Manifold Absolute Pressure (MAP) Sensor for Engine Control, Turbo Boost Pressure Monitoring, Industrial Process Pressure Measurement, HVAC Duct Static Pressure Sensing, Portable Barometric / Altitude Data Logger, Fuel and Oil Pressure Monitoring Systems.
Manifold Absolute Pressure (MAP) Sensor for Engine Control
The MPX4250GP was designed specifically for automotive manifold absolute pressure sensing, and a 0-250 kPa vented-gauge range with 18.8 mV/kPa sensitivity maps cleanly to naturally aspirated and lightly boosted gasoline engines. The on-chip temperature compensation eliminates the thermistor network older MAP sensors required, simplifying ECU firmware by feeding the ADC a clean 0.2 V to 4.9 V signal proportional to boost. The 6-SIP barbed port mounts directly to a vacuum nipple on the intake manifold.
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Turbo Boost Pressure Monitoring
Although rated to 250 kPa, the MPX4250GP is widely used in aftermarket turbo boost gauges up to about 15 PSI of gauge pressure, well within its full-scale range. Mounting the sensor down-stream of the turbo/intercooler lets the gauge display rapid boost transients with 18.8 mV/kPa resolution, fast enough to capture spool events. The MPX4250GP's internal vented-gauge design means no external reference hose is required, a key advantage over absolute-pressure variants in open-boost-gauge installations.
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Industrial Process Pressure Measurement
In factory automation systems, the MPX4250GP serves as a 0-250 kPa process-pressure transducer for low-pressure gas and liquid lines - common in pneumatic control loops, water-line pressure monitoring, and HVAC duct pressure sensing. The integrated temperature compensation and calibration yield better than 1 percent accuracy across the -40 C to +125 C industrial range, suitable for PLC analog inputs without further linearization. Engineers typically pair the device with a rail-to-rail op-amp buffer and a 16-bit sigma-delta ADC for instrumentation-grade readings.
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HVAC Duct Static Pressure Sensing
Building-automation systems often measure duct static pressure in the +/- 250 kPa range to verify filter loading and fan performance. The MPX4250GP's differential sensitivity of 18.8 mV/kPa and 5 V ratiometric supply match common HVAC controller analog inputs, while the barbed port simplifies field installation with standard pneumatic tubing. The -40 C to +125 C operating range covers rooftop and mechanical-room environments, and the integrated ASIC handles drift correction that bare-bridge sensors used to require.
推薦
Portable Barometric / Altitude Data Logger
Battery-powered data loggers benefit from the MPX4250GP's low supply current and single-rail 5 V operation, simplifying the power tree in field-portable instruments. The vented-gauge configuration also doubles as an altimeter or weather-station barometer - subtract the local reference pressure and the output becomes a precise altitude reading up to roughly 10 km altitude. Designers typically pair the sensor with a low-power MCU and a microSD logger; the analog output eliminates need for digital sensor drivers.
推薦
Fuel and Oil Pressure Monitoring Systems
Heavy-duty diesel and marine engines use pressure sensors in fuel rails and oil galleries; the MPX4250GP's 250 kPa range suits low-pressure oil circuits and low-pressure fuel systems (intake side of the lift pump). The 6-SIP package and barbed port make mechanical mounting straightforward on engine blocks, while the ratiometric output drives common panel gauges and ECU analog inputs. The -40 C to +125 C operating range covers harsh under-hood conditions including crankcase and transmission oil-pan environments.
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推薦產品摘要
工程參考資料，適用於 MPX4250GP — 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 | MPX4250DP | MPX4250A | MPX5500DP | MPX5010GP | MPX4115AS |
|---|---|---|---|---|---|---|
| Package | 6-SIP Module | 6-SIP Module - same | 6-SIP Module - same | 6-SIP Module - same | 6-SIP Module - same | 6-SIP Module - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Pressure Range | 0-250 kPa (0-36.26 PSI) | 0-250 kPa | 0-250 kPa | 0-500 kPa | 0-10 kPa | 0-115 kPa absolute |
| Sensitivity | 18.8 mV/kPa | 18.8 mV/kPa | 18.8 mV/kPa | 9.0 mV/kPa | 450 mV/kPa | 40.8 mV/kPa |
| Output Voltage 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 | 0.2 V to 4.9 V | 0.2 V to 4.9 V |
| Supply Voltage | 4.85 V to 5.35 V | 4.85 V to 5.35 V | 4.85 V to 5.35 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.85 V to 5.35 V |
| Port Style | Single barbed, GP | Dual port, DP | Absolute (single port) | Dual port, DP | Single barbed, GP | Single port, AS |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
主要差異化特點
- Same 250 kPa range as MPX4250DP (對比MPX4250DP)
- Higher full-scale than legacy MPX4115AS (對比MPX4115AS)
- Lower current consumption than MPX5500DP (對比MPX5500DP)
設計說明
The MPX4250GP's output is ratiometric to the 5 V supply, so any noise or sag on VCC translates directly into pressure-reading error. Use a low-noise regulator (LDO such as the MAX176ACPA or equivalent) rather than a switching converter for the sensor rail, and place a 100 nF ceramic decoupling capacitor directly at the sensor VCC pin. Wire the device ground to the analog ground plane to avoid digital switching noise coupling into the analog output.
Route the MPX4250GP analog output trace away from high-frequency switching nodes (DC-DC inductors, MOSFET switches, microSD connectors). Keep the trace short - ideally less than 25 mm - and place a 1 kohm series resistor plus 100 pF shunt to ground at the receiving ADC input for a first-order RC anti-alias filter. Add an op-amp buffer (e.g. the MAX150ACWP+T) close to the sensor if the ADC is more than 50 mm away.
The MPX4250GP is a vented-gauge sensor and requires the rear vent port to remain unobstructed for accurate readings. Mount the device so the vent faces downward and is not blocked by sealant, condensation, or contamination. Do not apply pressures exceeding 250 kPa without consulting the overpressure rating in the datasheet - the silicon membrane can crack if the proof-pressure limit is exceeded.
The 6-SIP module sits vertically on the PCB; design the through-hole pad pattern to accept the standard 2.54 mm pin pitch of the MPXxx family. Use strain-relief on the pneumatic tube so the barbed port is not loaded axially - repeated tube-pulling can crack the plastic body. If the sensor is remote from the board, run the VCC, GND, and VOUT as a shielded twisted pair with ground on the drain wire.
合規資訊
Compliance status not explicitly stated in the searched snippets. AEC-Q100 qualification not explicitly stated in the verified data - automotive-grade compatibility should be confirmed with NXP directly before use in production automotive designs.
