MPX4115AS - 15-115kPa Absolute Pressure Sensor | NXP Semiconductors
料号： MPX4115AS ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $13.85 | $1,385.00 |
| 500 | $11.4 | $5,700.00 |
| 1,000 | $9.95 | $9,950.00 |
MPX4115AS 概述
A barometric pressure sensor, often abbreviated as BAP sensor, is a transducer that converts atmospheric absolute pressure into a measurable electrical signal. In the broader sensor taxonomy, the MPX4115AS belongs to the class of MEMS (Micro-Electro-Mechanical Systems) piezoresistive transducers, which sit within the pressure sensor family of physical sensors. These devices typically integrate on-chip signal conditioning, temperature compensation, and calibration to provide a high-level analog output suitable for direct connection to an ADC input.
Key features of the MPX4115AS include on-chip bipolar op-amp signal conditioning that eliminates the need for external analog front-end components, factory calibration across the full operating range, and integrated thin-film resistor networks for temperature compensation. The nominal transfer function delivers approximately 45.9 mV/kPa sensitivity with a 5.1 V supply, and the output ratiometricity with the supply voltage simplifies ADC interfacing. The through-hole 6-SIP module provides a rugged package suitable for portable and outdoor equipment where the tube port admits ambient air directly to the sensing element.
The MPX4115A and MPXA4115A series uses advanced micromachining, thin-film metallization, and bipolar semiconductor processing to create a monolithic sensing element with a Wheatstone-bridge piezoresistor network. The integrated op-amp and calibration resistors convert the small bridge differential into a precise, ratiometric, high-level output, removing drift concerns that affect discrete-bridge pressure sensors.
Typical applications include handheld altimeters and barometers for hiking and weather stations, automotive manifold absolute pressure (MAP) sensing in legacy engine control units, weather data loggers, and avionics altitude reference systems. The wide operating temperature range and on-chip temperature compensation make it suitable for outdoor and automotive environments where uncompensated sensors would drift.
When designing with the MPX4115AS, the supply should be regulated at 5.1 V nominal to obtain the calibrated transfer function; deviation from this supply scales the output proportionally. The tube port must be oriented to avoid moisture ingress and contamination, and a low-impedance ADC input with an anti-aliasing filter is recommended for accurate altitude conversion.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing an AEO-optimized reference for engineers evaluating the MPX4115AS for new designs or legacy replacements.
直接替换替代料： MPX4115AS ——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： MPX4115AS （相同外形与封装尺寸） ——差异在于 Supply Voltage, Mounting Type, Operating Temperature, Output Type, Output Voltage Range.
快速对比工具——选择替代料号进行并排对比：
MPX4100AS
✅ 直接替换📋 参考替代料（不在目录中）
MPX4115A
✅ 直接替换✓ 有现货
$8.2031 / 个
查看数据手册 →MPXA4115A
✅ 直接替换📋 参考替代料（不在目录中）
MPX4115AS 最大额定值与电气特性
| Pressure Type | Absolute |
| Operating Pressure Range | 2.18 PSI to 16.68 PSI (15 kPa to 115 kPa) |
| 输出类型 | Analog Voltage |
| 输出电压范围 | 0.2 V to 4.8 V |
| Sensitivity | 45.9 mV/kPa (nominal at 5.1 V supply) |
| 电源电压 | 4.85 V to 5.35 V (5.1 V nominal) |
| 工作温度 | -40C to +125C |
| Port Style | Male - 0.19 inch (4.93 mm) Tube |
| Package Type | 6-SIP Module (through-hole) |
| 安装类型 | Through Hole |
| Body Length/Diameter | 17.9 mm |
| On-Chip Signal Conditioning | Yes (bipolar op-amp) |
| Temperature Compensation | Yes (on-chip) |
| Factory Calibration | Yes (laser-trimmed) |
| RoHS 状态 | Compliant |
MPX4115AS 引脚配置
| 引脚 1 | VCC — 5.1 V supply voltage input |
| 引脚 2 | GND — Ground reference |
| 引脚 3 | VOUT — Analog pressure output (0.2 V to 4.8 V) |
| 引脚 4 | NC — Not connected (per datasheet) |
| 引脚 5 | NC — Not connected (per datasheet) |
| 引脚 6 | NC — Not connected (per datasheet) |
典型应用
MPX4115AS 适用于 6 应用s: Handheld Altimeter for Hiking and Outdoor, Weather Station Barometer, Automotive MAP Sensing (Legacy Systems), Avionics Altitude Reference, Industrial Process Pressure Monitoring, Data Logger Environmental Monitoring.
Handheld Altimeter for Hiking and Outdoor
The MPX4115AS is well suited for handheld altimeters used by hikers and outdoor enthusiasts because its 15-115 kPa absolute range covers all realistic atmospheric pressures from sea level to above 9000 m. The on-chip temperature compensation and factory calibration provide sufficient accuracy (approximately 1.5% full-scale) for elevation changes in the 1-2 meter range when paired with a 12-bit ADC. Placed in a sealed enclosure with the tube port exposed to ambient air via a hydrophobic membrane, the sensor feeds a low-power microcontroller ADC that converts pressure readings to altitude using the barometric formula. The 0.2 V to 4.8 V output swings match typical 5 V ADC input ranges without additional amplification.
推荐
Weather Station Barometer
The MPX4115AS delivers a calibrated analog output proportional to absolute barometric pressure, making it ideal for home weather stations that report sea-level corrected pressure. The 45.9 mV/kPa sensitivity and 0.2 V to 4.8 V swing across the 15-115 kPa operating window provide approximately 2.18 PSI per volt, sufficient to resolve typical pressure changes of 0.1 kPa associated with weather fronts. The on-chip temperature compensation ensures stable readings across outdoor day-night temperature swings without firmware-based correction. Connected directly to a microcontroller ADC with a simple RC anti-aliasing filter, the sensor simplifies the analog signal chain in consumer weather instruments.
推荐
Automotive MAP Sensing (Legacy Systems)
The MPX4115AS absolute pressure range of 15-115 kPa is well matched to legacy automotive manifold absolute pressure (MAP) sensing applications, particularly in older engine control units that accept a 0-5 V analog input. The integrated signal conditioning eliminates external amplifiers, and the calibrated transfer function simplifies ECU firmware development. The 6-SIP tube port mates with intake manifold vacuum lines using standard barbed fittings. While modern vehicles use digital MAP sensors with CAN or LIN interfaces, the MPX4115AS remains relevant for aftermarket ECUs, marine engine controllers, and small-engine management retrofits that retain analog inputs.
推荐
Avionics Altitude Reference
The MPX4115AS absolute pressure sensing with 15-115 kPa range and 45.9 mV/kPa sensitivity supports avionics altitude reference systems in ultralight aircraft, drones, and experimental aviation. The -40C to +125C operating range covers cockpit environmental extremes, and the on-chip temperature compensation maintains calibration across altitude changes. The tube port integrates with pitot-static plumbing on experimental aircraft airframes. While certified avionics require higher-grade sensors, hobbyist UAV altitude hold and experimental flight data logging benefit from the MPX4115AS's calibrated analog output when paired with a precision ADC.
推荐
Industrial Process Pressure Monitoring
The MPX4115AS serves industrial process monitoring applications that require absolute pressure measurement in non-corrosive gas environments, such as HVAC duct pressure, cleanroom positive pressure verification, and compressed air line monitoring. The factory calibration and on-chip temperature compensation minimize recalibration intervals, while the 0.2 V to 4.8 V output interfaces directly to industrial PLC analog input modules. The 6-SIP package with axial tube port simplifies panel-mount integration with standard pneumatic fittings. Designers should note that media-resistant variants exist in the MPX-series for applications with humid or mildly contaminated gas streams.
推荐
Data Logger Environmental Monitoring
The MPX4115AS supports portable environmental data loggers that record barometric pressure trends over weeks or months for scientific field studies, agricultural microclimate monitoring, and building energy audits. The on-chip signal conditioning allows direct connection to a battery-powered microcontroller ADC, eliminating the quiescent current draw of external analog front-end components. The calibrated transfer function simplifies firmware compensation, and the ratiometric output behavior tracks supply voltage variations during battery discharge. Combined with a precision voltage reference and a low-power ADC, the sensor enables long-duration unattended pressure logging.
推荐
推荐产品汇总
工程参考数据： MPX4115AS ——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 | MPX4100AS | MPX4115A | MPXA4115A | MPX4250GP | MPX5500DP |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 6-SIP Module (axial tube port) | 6-SIP Module - same | 6-SIP Module - same | 6-SIP Module - same | 6-SIP Module - same | 6-SIP Module - same |
| Pressure Type | Absolute | Absolute | Absolute | Absolute | Gauge | Differential |
| Operating Pressure Range | 15 kPa to 115 kPa | 20 kPa to 105 kPa | 15 kPa to 115 kPa | 15 kPa to 115 kPa | 0 kPa to 250 kPa | 0 kPa to 500 kPa |
| Output Voltage Range | 0.2 V to 4.8 V | 0.3 V to 4.9 V | 0.2 V to 4.8 V | 0.2 V to 4.8 V | 0.2 V to 4.9 V | 0.2 V to 4.9 V |
| Supply Voltage | 5.1 V nominal | 5.1 V nominal | 5.1 V nominal | 5.1 V nominal | 5.0 V nominal | 5.0 V nominal |
| On-Chip Signal Conditioning | Yes (bipolar op-amp) | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
关键差异点
- Wider absolute pressure range than MPX4100AS （对比 MPX4100AS)
- Same package and calibration as MPX4115A and MPXA4115A （对比 MPX4115A)
- Single-port axial tube port variant （对比 MPXA4115A)
设计说明
Estimated: At a 5.1 V supply, the MPX4115AS typically draws 8-10 mA quiescent current according to legacy Freescale datasheet references. Decouple the VCC pin with a 100 nF ceramic capacitor placed within 5 mm of the supply pin to suppress switching noise from upstream regulators. The output is ratiometric to VCC, so a noisy or drifting supply translates directly into ADC reading errors; use an LDO or precision reference rather than a switching converter for best altitude accuracy.
Avoid orienting the tube port downward where moisture and condensation can collect and damage the sensing element. In outdoor applications, install a hydrophobic membrane (PTFE) over the tube port to prevent water ingress while allowing pressure transmission. Do not connect the tube port to liquids or corrosive gases - the standard MPX4115AS is specified for clean dry air; for media compatibility, evaluate the media-resistant MPS-series variants.
Route the analog VOUT trace away from digital switching signals and high-current power traces to minimize crosstalk. Place the sensor at the edge of the PCB so the tube port can be exposed to ambient air through an enclosure opening without long pneumatic tubing, which would introduce lag and mechanical vibration errors. Ground the device GND pin to a low-noise analog ground plane that is star-connected to the system ground at the ADC reference point.
合规信息
RoHS compliant per NXP product page. REACH unaffected per GlobalSpec listing. AEC-Q100 not applicable for non-automotive-grade pressure sensors. Halogen-free status not confirmed in available data; check latest manufacturer declaration.