MPX4250D - 250 kPa Differential Pressure Sensor 0.2-4.9 V | NXP/ST
料号： MPX4250D ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.4 | $164.00 |
| 100 | $14.2 | $1,420.00 |
| 500 | $12.8 | $6,400.00 |
| 1,000 | $11.5 | $11,500.00 |
MPX4250D 概述
A pressure sensor of this type is a transducer that converts an applied differential pressure into a proportional analog voltage. Within the broader sensor taxonomy, the MPX4250D sits in the piezoresistive silicon pressure sensor family, a sub-class of MEMS sensors, which itself belongs to the wider group of analog transducers used for physical-parameter measurement in industrial, automotive, and consumer systems. The on-chip signal conditioning eliminates the need for external amplification or trimming, allowing direct connection to a microcontroller ADC input.
Key specifications include a 0.2 V to 4.9 V ratiometric analog output over 5.0 V typical supply, a 4.7 ms response time, a 1.0 % full-scale error over 0 to 85 °C, and a typical full-scale span of 4.7 V. The sensor is temperature-compensated across -40 °C to +125 °C, making it suitable for under-hood automotive environments as well as industrial process monitoring. It uses dual longitudinal pressure ports for differential measurement referenced to atmospheric or vacuum pressure.
Internally, the MPX4250D uses a thin-film metallization layer on a micromachined silicon diaphragm whose resistance changes with strain. The Wheatstone bridge formed by the diffused piezoresistors is laser-trimmed during manufacture for span and offset, so the device needs no user calibration. The bipolar signal-conditioning path then amplifies the differential bridge voltage to the calibrated 0.2-4.9 V swing at 5.0 V supply.
Typical applications include automotive manifold absolute pressure (MAP) sensing for turbo-boost and engine control, HVAC differential pressure measurement, industrial pneumatics, altimeters and barometric instruments, and consumer appliance pressure feedback. In automotive engine control units (ECUs) the calibrated linear output maps directly to manifold pressure for fuel-injection timing.
A key design consideration is that the output is ratiometric to the supply voltage: with a stable 5.000 V reference, the output scales linearly; if the supply drifts ±5 %, the output error is roughly ±5 %. Using an ADC reference derived from the same 5 V rail preserves ratiometric accuracy and avoids calibration drift.
This page synthesizes distributor pricing for the MPX4250D cross-listed by both NXP Semiconductors and STMicroelectronics, drop-in alternatives in the same 6-SIP footprint, and practical design guidance not found in the brief datasheet excerpts.
直接替换替代料： MPX4250D ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MPX4250D （相同外形与封装尺寸） ——差异在于 Mounting Type, Operating Pressure Range, Operating Temperature, Output Voltage Range, Pressure Type.
快速对比工具——选择替代料号进行并排对比：
MPX4250DP
✅ 直接替换✓ 有现货
$10.4 / 个
查看数据手册 →MPX4250A
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$8.95 / 个
查看数据手册 →MPX4250AP
✅ 直接替换✓ 有现货
$8.1 / 个
查看数据手册 →MPX4250D 最大额定值与电气特性
| 传感器类型 | Differential Pressure Sensor |
| Pressure Range | 0 kPa to 250 kPa (0 to 36.26 psi) |
| 输出类型 | Analog Voltage (ratiometric) |
| 输出电压范围 | 0.2 V to 4.9 V |
| Supply Voltage (Vs) | 4.85 V to 5.35 V (5.0 V typical) |
| Full-Scale Span | 4.7 V (typical) |
| Accuracy | 1.0 % full-scale (0 °C to 85 °C) |
| Response Time | 4.7 ms (typical) |
| 工作温度 | -40 °C to +125 °C |
| Pressure Port Type | Dual longitudinal (differential) |
| 封装 / 外壳 | 6-SIP Module |
| 安装类型 | Through-Hole (SIP) |
| On-Chip Signal Conditioning | Yes (calibrated, temperature-compensated) |
| Technology | Piezoresistive MEMS, silicon diaphragm |
| Manufacturer (Original) | Motorola Semiconductor; now NXP / STMicroelectronics |
MPX4250D 引脚配置
| 引脚 1 | GND — Ground return for sensor and signal-conditioning circuitry |
| 引脚 2 | Vs — Supply voltage input (5.0 V typical, 4.85-5.35 V range) |
| 引脚 3 | Vout — Analog output voltage ratiometric to Vs (0.2-4.9 V over 0-250 kPa) |
| 引脚 4 | NC — No internal connection - not bonded |
| 引脚 5 | P1 — Pressure port 1 (high-side differential pressure inlet) |
| 引脚 6 | P2 — Pressure port 2 (low-side differential pressure reference) |
典型应用
MPX4250D 适用于 6 应用s: Automotive Manifold Absolute Pressure (MAP) Sensing, Turbocharger Boost Pressure Monitoring, HVAC Differential Pressure Sensing, Industrial Pneumatic System Monitoring, Barometric and Altimeter Instrumentation, Consumer Appliance Pressure Feedback.
Automotive Manifold Absolute Pressure (MAP) Sensing
The MPX4250D's 0-250 kPa range and -40 °C to +125 °C operating span cover the full manifold-pressure envelope of naturally-aspirated and turbocharged gasoline engines. Its 0.2-4.9 V ratiometric output scales directly to fuel-injection pulse width: at 100 kPa (1 bar boost) the output sits at roughly 2.07 V, giving 207 mV per kPa slope for ADC conversion in the ECU. The on-chip calibration eliminates trim pots in production. The 6-SIP dual-port geometry accepts one hose to the intake plenum and one reference port to atmospheric or sealed-vacuum baseline.
推荐
Turbocharger Boost Pressure Monitoring
For aftermarket and OEM turbocharger monitoring, the MPX4250D's 250 kPa ceiling handles boost levels up to ~21 psi (1.5 bar) absolute, well above stock turbo output without requiring a pre-divider. The 4.7 ms response time is fast enough for low-frequency boost-vs-RPM telemetry while remaining slow enough to reject combustion-cycle pressure spikes that would otherwise confuse the readout. Designers plumb the high port to the compressor outlet and read the ratiometric voltage directly into a 5 V ADC with the same supply as the reference to preserve accuracy across temperature and supply drift.
推荐
HVAC Differential Pressure Sensing
The MPX4250D is well matched to building-management HVAC airflow sensing where the filter-loading pressure drop spans a few kPa. With its full 250 kPa range the dynamic signal at typical filter-loading drops is small - the output change per 1 kPa is around 19 mV - so the system designer pairs it with a low-noise instrumentation front end or a 12-bit+ ADC. The dual-port 6-SIP module accepts standard 1/8 inch hose barbs for in-duct installation, and the calibrated 0.2 V zero-pressure offset simplifies system startup diagnostics.
推荐
Industrial Pneumatic System Monitoring
Factory pneumatic lines running at 6-8 bar (600-800 kPa) exceed the MPX4250D's 250 kPa ceiling, but downstream regulated lines at 2-4 bar fit comfortably within its range. In shop-floor pressure-verification stations the sensor's calibrated output, on-chip temperature compensation, and ±1 % accuracy over 0-85 °C eliminate the field-recalibration step that discrete bridge sensors require. The 6-SIP through-hole package is well suited to industrial-control-board layouts where through-hole components are still preferred for mechanical robustness.
推荐
Barometric and Altimeter Instrumentation
Although optimized for differential measurement, when used with a sealed low-pressure port the MPX4250D produces a usable barometric output across the meteorological 95-105 kPa band at high linearity. At sea level the output is around 2.07 V; at 3000 m altitude it falls to roughly 1.69 V, giving 4 mV per meter scaling. Hobbyist and educational altimeter designs benefit from the lack of user calibration. The ratiometric output is compensated against the 5 V reference, so battery-supplied designs use a precision 5 V regulator such as the REF02 family.
推荐
Consumer Appliance Pressure Feedback
White goods such as washing machines, dishwasher pumps, and vacuum cleaners benefit from the MPX4250D's calibrated linear output for tube-blockage detection and water-level sensing. The 4.7 ms response time is well matched to appliance control loops running at 100 Hz or slower. Because the on-chip signal conditioning removes external amplifiers, the BOM cost is lower than equivalent discrete-bridge designs, and the dual-port module simplifies plumbing between the sensor and the appliance control board.
推荐
推荐产品汇总
工程参考数据： MPX4250D ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MPX4250DP | MPX4250A | MPX4250AP | MPX4250GP | MPX4100A |
|---|---|---|---|---|---|---|
| Brand | NXP / STMicroelectronics | NXP | NXP | NXP | NXP | NXP |
| Package | 6-SIP Module | 6-SIP Module - same | 6-SIP Module - same | 6-SIP Module - same | 6-SIP Module - same | 6-SIP Module - same |
| Pressure Type | Differential | Differential (different port geometry) | Absolute (vacuum reference) | Absolute (vacuum reference) | Gauge (atmosphere reference) | Absolute (vacuum reference) |
| Pressure Range | 0 to 250 kPa | 0 to 250 kPa | 0 to 250 kPa | 0 to 250 kPa | 0 to 250 kPa | 20 to 105 kPa (~42% FSR of target) |
| 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 | 0.3 V to 4.9 V (slightly shifted zero) |
| Supply Voltage | 5.0 V (4.85-5.35 V) | 5.0 V | 5.0 V | 5.0 V | 5.0 V | 5.0 V |
| 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 |
| On-Chip Calibration | Yes (calibrated, temp-compensated) | Yes | Yes | Yes | Yes | Yes |
| Approx Unit Price (qty 100, USD) | 14.20 | ~14.50 | ~14.00 | ~14.20 | ~15.00 | ~13.50 |
关键差异点
- Cross-listed by both NXP and STMicroelectronics with identical die （对比 MPX4250DP)
- Differential measurement across dual ports （对比 MPX4250AP)
- 0-250 kPa wide range vs. narrower-range siblings （对比 MPX4100A)
设计说明
The MPX4250D output is ratiometric to the 5.0 V supply. For accurate absolute-pressure conversion across temperature, use the same 5.0 V rail as the ADC reference (REF02 or similar) so that supply drift common-mode rejects out. If the rail is regulated to ±0.5 % at the ADC reference pin the system-level accuracy approaches the intrinsic ±1.0 % sensor accuracy. Add 100 nF and 10 µF decoupling as close to pins 1-2 as practical, plus a ferrite bead for noisy automotive environments.
A frequent pitfall is plumbing both pressure ports into the same line, producing a zero-differential reading regardless of system pressure. Verify port orientation - pin 5 is high-side, pin 6 is low-side - and never block the low-side port unintentionally. A second common error is reading the MPX4250D into a 3.3 V ADC without scaling: the 4.9 V full-scale output exceeds 3.3 V rails. Use a 1.5:1 resistive divider (e.g., 10 kΩ + 20 kΩ) or select a 5 V-tolerant ADC input.
Estimated: at 5.0 V supply the MPX4250D draws ~10 mA (≈50 mW dissipation) on its internal bipolar circuitry, plus a small amount by the Wheatstone bridge. With the SIP body in still air on a typical 1 in² copper pour, junction temperature rise at +25 °C ambient is below 5 °C - well within the ±1.0 % temperature-compensated accuracy envelope. In sealed enclosures with no airflow, ensure the SIP body has a thermal path to a copper pour or use a clamping heatsink.
The MPX4250D 6-SIP leads slot through a 0.062 in FR-4 board with 6 holes spaced at the standard SIP pitch. Place a 10 µF or larger bulk supply cap within 25 mm of pin 2, and place the two low-ESR ceramic bypass caps (100 nF + 1 µF) within 5 mm of the supply pins. Keep high-current switching traces (DC-DC converters, motor drivers, solenoid drivers) at least 10 mm from the sensor output trace to avoid conducted injection into the analog signal.
The MPX4250D output is a low-impedance buffered ratiometric analog signal, but long PCB traces to a remote ADC can pick up EMI. Drive long traces with a follower op-amp (e.g., OPA2227) placed close to the sensor output pin. For multi-meter cable runs in industrial installations, use shielded cable with the shield grounded only at the sensor end to avoid ground loops. Add an RC low-pass (e.g., 1 kΩ + 100 nF) for digital-noise suppression if the ADC and MCU are co-located.
合规信息
MPX4250D was originally released by Motorola Semiconductor (historical datasheet Rev. 8.0) and is now cross-listed by NXP and STMicroelectronics. Explicit RoHS / REACH statements are not present in the publicly available web distributor excerpts; designers should verify compliance with the manufacturer product page before volume purchase. AEC-Q100 specific qualification is not stated in the provided data.