MPX4250A - 250 kPa MAP Pressure Sensor, On-Chip Conditioned | NXP
料号： MPX4250A ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $13.5 | $13.50 |
| 10 | $12.1 | $121.00 |
| 100 | $10.75 | $1,075.00 |
| 500 | $9.6 | $4,800.00 |
| 1,000 | $8.95 | $8,950.00 |
MPX4250A 概述
A manifold absolute pressure sensor is a piezoresistive transducer that converts an absolute pressure referenced to a sealed internal vacuum into a calibrated voltage. MAP sensors sit at the boundary between physical sensing and electronic signal conditioning, providing a high-level analog output that connects directly to an ECU's analog-to-digital input. They form a key subcategory of board-mount pressure sensors within the broader sensor hierarchy: pressure sensor -> transducer -> sensor IC -> signal conditioning IC -> semiconductor.
Key features of the MPX4250A include a maximum pressure rating of 1000 kPa, supply voltage range of 4.85 V to 5.35 V (typically 5.0 V), sensitivity of approximately 18.4 mV/kPa, response time of 1.0 ms, and a full operating temperature range of -40 C to +125 C. The monolithic silicon die uses piezoresistive bridges fabricated with bipolar-compatible thin-film metallization and micromachined diaphragms.
The output transfer function is approximately VOUT = VSUPPLY x (0.004 x P - 0.04) - 0.04 V + VSUPPLY x 0.04 with the supplied transfer function Vout = Vsup x (0.01058 x P - 0.1518), where P is pressure in kPa. At 5.0 V supply, 0 kPa produces nominally 0.25 V, 100 kPa produces about 2.45 V, 200 kPa produces about 4.65 V, and 250 kPa produces 4.90 V. The on-chip temperature compensation holds accuracy within the datasheet-specified error band across the full -40 C to +125 C automotive-grade window.
Typical applications include automotive engine control units, where the MAP sensor feeds the ECU for air-mass calculation and fuel injection timing, motorcycle and small-engine fuel injection, industrial vacuum monitoring, altitude-corrected barometric pressure measurement, and HVAC blower-pressure feedback loops. The wide 250 kPa span aligns naturally with naturally-aspirated gasoline intake manifolds and the 1.0 atmosphere operating point of sealed-vacuum-referenced MAP designs.
When designing with this part, place a small RC low-pass filter at the Vout pin to suppress high-frequency EMC artifacts, and ensure the pneumatic port is sealed against moisture. Because the part uses a sealed vacuum reference and absolute pressure measurement, no altitude correction at installation is required - which differs from gauge-pressure sensors requiring vent tubes. The datasheet provides a complete transfer function polynomial plus worst-case error band including nonlinearity, temperature hysteresis, and pressure hysteresis.
This page synthesizes distributor pricing, drop-in package-same alternatives from the MPX4250 family, and design considerations not consolidated in the manufacturer datasheet.
直接替换替代料： MPX4250A ——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： MPX4250A （相同外形与封装尺寸） ——差异在于 Mounting Type, Operating Pressure Range, Output Type, Output Voltage Range, Pressure Type.
快速对比工具——选择替代料号进行并排对比：
MPX4250AP
✅ 直接替换✓ 有现货
$8.1 / 个
查看数据手册 →MPX4250GP
✅ 直接替换✓ 有现货
$9.85 / 个
查看数据手册 →MPX4250DP
✅ 直接替换✓ 有现货
$10.4 / 个
查看数据手册 →MPX4250AC6T1
✅ 直接替换📋 参考替代料（不在目录中）
MPX4250AC6U
✅ 直接替换📋 参考替代料（不在目录中）
MPX4250A 最大额定值与电气特性
| 传感器类型 | Manifold Absolute Pressure (MAP), sealed vacuum reference |
| Pressure Range | 20 kPa to 250 kPa (2.9 PSI to 36.3 PSI) |
| Operating Pressure Range | 20 to 250 kPa absolute |
| 输出类型 | Analog, ratiometric to supply voltage |
| 输出电压范围 | 0.2 V to 4.9 V (at 5.0 V supply) |
| 电源电压 | 4.85 V to 5.35 V (5.0 V typical) |
| Sensitivity | Approx. 18.4 mV/kPa (at Vsup = 5.0 V) |
| Response Time | 1.0 ms |
| 工作温度 | -40 C to +125 C |
| 封装 / 外壳 | 6-SIP Module |
| 安装类型 | Through Hole, SIP |
| Port Style | No port / non-port (basic element) |
| On-Chip Signal Conditioning | Yes (amplified, temperature-compensated, calibrated) |
| RoHS 状态 | Compliant (per NXP product page) |
MPX4250A 6-sip module 引脚配置指南
MPX4250A（6-sip module 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： MPX4250A.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MPX4250A 适用于 6 应用s: Automotive Engine Control Unit (MAP), Motorcycle and Small-Engine Fuel Injection, Industrial Vacuum Monitoring, Altitude-Corrected Barometric Reference, HVAC Blower-Pressure Feedback, Engine Management Add-On Modules.
Automotive Engine Control Unit (MAP)
The MPX4250A was originally designed as the manifold absolute pressure sensor feeding an engine ECU to compute air mass and fuel injection timing. Its 20-250 kPa absolute range covers the full sweep from atmospheric (~101 kPa at idle) down to wide-open-throttle vacuum (~30-50 kPa) and up to boosted conditions near 250 kPa, while its 0.2-4.9 V ratiometric output feeds the ECU's 5 V A/D input directly. On-chip temperature compensation and calibration remove the need for external amplifier stages, which is why the MPX4250 family has been the de facto MAP sensor choice in fuel-injected ECUs for decades. The 6-SIP module flange seals directly against the intake manifold with an integrated O-ring, and the monolithic silicon die survives the under-hood environment across -40 C to +125 C. Companion parts include the ECU microcontroller (NXP S12 or MPC5xxx families) and the 5 V LDO regulator powering both the sensor and the ADC reference.
推荐
Motorcycle and Small-Engine Fuel Injection
Small-displacement motorcycle ECUs and modern outboard-motor / generator EFI controllers use the MPX4250A as the primary manifold-pressure input to their closed-loop fuel algorithms. The 6-SIP through-hole package is rugged enough for vibration-prone two-wheeler installations and the part's tight tolerance on the transfer function allows aftermarket EFI retrofits to drop it in without recalibration for most naturally-aspirated 4-stroke engines. At 5 V supply, the 0.25 V at 0 kPa, 4.65 V at 200 kPa endpoints allow a 10-bit ADC to resolve pressure in well under 1 kPa increments - more than enough for closed-loop fueling. The wide -40 C to +125 C operating window handles the under-seat thermal environment from cold-soak to summer-idle use.
推荐
Industrial Vacuum Monitoring
Industrial pneumatic systems use the MPX4250A's 20-250 kPa absolute window to monitor vacuum levels in pick-and-place tooling, vacuum-clamp tables, and bag-sealing machines. The on-chip temperature compensation eliminates drift in factory-floor environments that swing from cold start to operating temperature, and the 0.2-4.9 V ratiometric output connects directly to PLC analog inputs and 4-20 mA shunt converters. Because the part references sealed vacuum internally, it does not need a vent tube, simplifying panel-mounting with no atmospheric-reference tubing concern. The 1.0 ms response time tracks pressure pulses in real time, which is useful for vacuum-leak detection in tooling-fixture diagnostics.
推荐
Altitude-Corrected Barometric Reference
Drones, weather stations, and handheld GPS units use the MPX4250A as a sealed-reference barometric element where the absolute-pressure reading is fed to firmware that computes altitude via the barometric formula. Because the part is sealed-vacuum referenced, no vent tube calibration is needed at installation - the absolute reading is the altitude-corrected reading directly. The 20 kPa floor corresponds to about 9.6 km altitude with the international barometric equation, covering virtually all commercial drone and handheld needs. Several open-source flight-controller firmware packages (INAV, Betaflight) include canned MPX4250 transfer functions for baro-aided altitude hold, and the ratiometric output complements 3.3 V ADC references as easily as 5 V.
推荐
HVAC Blower-Pressure Feedback
HVAC duct-pressure transducers that drive variable-speed blower control loops can use the MPX4250A for cost-effective feedback of filter-loading differential or duct static pressure. The part's 0.2-4.9 V output feeds directly into HVAC controller boards, and the sealed vacuum reference means a single absolute sensor can replace a differential sensor plus reference plumbing in many blower-control designs. The 6-SIP module flanges directly into the duct wall or air-handler housing, simplifying mechanical assembly relative to SMT pressure ICs that need a separate pressure port. The wide operating temperature range accommodates hot attic and unconditioned mechanical-room installations.
推荐
Engine Management Add-On Modules
Aftermarket piggyback ECUs, ignition controllers, and wideband O2 controllers often use the MPX4250A as a secondary MAP input for boost-cut fuel-cut strategies and traction-control torque calculations. Its small 6-SIP outline is friendly to the cramped enclosures of an automotive add-on module, and the calibrated output means no firmware-side linearization is required beyond reading the transfer function polynomial from the datasheet. Hobby-grade engine management firmware (MegaSquirt, Speeduino) has canned MPX4250 support and the part's stock availability on breakout boards makes it the default choice for DIY EFI conversions. The pressure range is wide enough to handle naturally-aspirated, mild-boost (under 12 psi) and similar mild-performance street builds.
推荐
推荐产品汇总
工程参考数据： MPX4250A ——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 | MPX4250AP | MPX4250GP | MPX4250DP | MPX4250AC6T1 | MPX4250AC6U |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| 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 Range | 20-250 kPa | 20-250 kPa - same | 20-250 kPa - same | 20-250 kPa - same | 20-250 kPa - same | 20-250 kPa - same |
| Pressure Type | Absolute (sealed vacuum ref) | Absolute - same | Absolute - same | Absolute - same | Absolute - same | Absolute - same |
| Output Range | 0.2 V to 4.9 V (at 5 V supply) | 0.2 V to 4.9 V - same | 0.2 V to 4.9 V - same | 0.2 V to 4.9 V - same | 0.2 V to 4.9 V - same | 0.2 V to 4.9 V - same |
| Port Style | No port / non-port element | Axial port 4.93 mm tube | Single side port | Dual port high-pressure | No port - same (T&R variant) | No port - same (Ammo variant) |
| Supply Voltage | 4.85 V to 5.35 V (typ 5.0 V) | 5.0 V typical - same | 5.0 V typical - same | 5.0 V typical - same | 5.0 V typical - same | 5.0 V typical - same |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C - same | -40 C to +125 C - same | -40 C to +125 C - same | -40 C to +125 C - same | -40 C to +125 C - same |
| On-Chip Signal Conditioning | Yes (temp-compensated, calibrated) | Yes - same | Yes - same | Yes - same | Yes - same | Yes - same |
| Lifecycle Status | NRND | Active | Active | Active | Active | Active |
关键差异点
- Same-family MPX4250AP variant offers axial hose port for in-line applications （对比 MPX4250AP)
- Same-family side-port and dual-port variants enable manifold-mount options （对比 MPX4250GP / MPX4250DP)
- Tape-and-reel and ammo-pack variant options for high-volume manufacturing （对比 MPX4250AC6T1 / MPX4250AC6U)
设计说明
Keep the MPX4250A module flange clean and dry before installation - any debris between the module and the manifold surface will create a leak path that introduces gauge-pressure error on top of the absolute reading. Torque the mounting screws per the datasheet recommendation (typically 6-8 in-lbs depending on housing material) to avoid cracking the ceramic substrate of the SIP package.
Route the analog Vout trace away from injector and ignition-switching traces and from any coil or relay drivers to minimize coupled noise on the 0.2-4.9 V output signal. Place a 100 nF ceramic decoupling cap and a 10 uF bulk cap as close as practical to the Vsup pin (pin 1) so ratiometric operation gives a clean supply to the on-chip amplifier. Use a small RC low-pass filter (e.g. 100 ohm + 100 nF) on Vout at the ADC input to suppress 100 kHz+ EMC artifacts.
Do not connect the sensor port to a pressure source that exceeds 1000 kPa absolute - the overpressure damage threshold is well above the operating range but well below what a careless shop air supply can deliver. Avoid exposing the device to condensation or water ingestion at the pneumatic port; if the application sees moisture, add a hydrophobic membrane in the manifold interface. Finally, do not assume any other MPX4250x variant is a drop-in - many share the package outline but have different transfer function polynomials that must be matched in firmware.
合规信息
RoHS compliance and AEC-Q100 automotive qualification are indicated per the NXP MPX4250A product page. REACH and conflict-minerals statements are not surfaced in the verified data - consult NXP directly for those compliance attestations before shipping to the EU market.