MPXA4115AP - 15-115 kPa Absolute Pressure Sensor | NXP | Altimeter/Barometer
料号： MPXA4115AP ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $24.5 | $24.50 |
| 10 | $21.75 | $217.50 |
| 100 | $18.9 | $1,890.00 |
| 500 | $16.4 | $8,200.00 |
| 1,000 | $14.2 | $14,200.00 |
MPXA4115AP 概述
An absolute pressure sensor is a transducer whose output is referenced to a sealed internal vacuum rather than to ambient atmospheric pressure. This makes the part inherently suitable for altitude measurement, where the parameter of interest is the absolute atmospheric pressure rather than its deviation from a local reference. In the broader sensor hierarchy, the MPXA4115AP sits within the piezoresistive pressure sensor family, which uses diffused strain gauges on a silicon diaphragm to convert mechanical pressure into a differential voltage.
Key features include on-chip signal conditioning, factory calibration, and temperature compensation over 0 °C to 85 °C, eliminating the need for external trimming. The device operates from a single 4.85 V to 5.35 V supply, has a typical current consumption near 8 mA, and provides a ratiometric analog output whose transfer function spans 0.2 V at 15 kPa to 4.8 V at 115 kPa. Its 8-SMD, gull-wing, side-port package simplifies PCB mounting while exposing the sensing port on the side for tube connection.
The internal architecture combines a micromachined silicon diaphragm with a Wheatstone-bridge piezoresistive network and an analog signal-conditioning ASIC. The ASIC provides offset, span, and temperature compensation calibrated at the factory so that VOUT tracks the supply voltage and delivers a near-linear pressure-to-voltage conversion. The side-port tube interface isolates the die from harsh media in manifold-type applications.
Typical applications include automotive manifold absolute pressure (MAP) sensing, weather station barometers, handheld altimeters, industrial pressure instrumentation, and HVAC air-flow monitoring. The wide 15-115 kPa range comfortably covers sea-level atmospheric (101.325 kPa) through high-altitude operation, while the on-chip calibration removes the burden of in-system trimming.
When designing with this part, place a 0.1 µF decoupling capacitor close to the supply pin and route the analog output away from switching nodes. The side-port tube interface is sized for a 0.13 inch (3.17 mm) male tube fitting, so plan mechanical clearance accordingly on the PCB and enclosure.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet.
直接替换替代料： MPXA4115AP ——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： MPXA4115AP （相同外形与封装尺寸） ——差异在于 Operating Temperature, Output Type, Supply Voltage, Package / Case, Port Style.
快速对比工具——选择替代料号进行并排对比：
MPXA4115A6U
✅ 直接替换✓ 有现货
$10.5 / 个
查看数据手册 →MPXA4115A6T1
✅ 直接替换✓ 有现货
$6.65 / 个
查看数据手册 →MPXAZ4115A6T1
✅ 直接替换✓ 有现货
$9.45 / 个
查看数据手册 →MPXA6115AC6T1
✅ 直接替换✓ 有现货
$8.65 / 个
查看数据手册 →MPXA4115AP 最大额定值与电气特性
| Pressure Type | Absolute |
| Operating Pressure Range | 15 kPa to 115 kPa (2.18 PSI to 16.68 PSI) |
| Operating Pressure (max) | 400 kPa (overload) |
| 输出类型 | Analog Voltage (ratiometric) |
| 输出电压范围 | 0.2 V to 4.8 V |
| 电源电压 | 4.85 V to 5.35 V |
| 工作温度 | -40 °C to +125 °C (compensated 0 °C to 85 °C) |
| Port Size | Male, 0.13" (3.17 mm) tube |
| Port Style | Side port |
| 封装 / 外壳 | 8-SMD, Gull Wing, Side Port |
| 安装类型 | Surface Mount |
| Termination Style | PCB / Gull Wing |
| RoHS 状态 | Compliant |
| Signal Conditioning | On-chip, calibrated, temperature compensated |
MPXA4115AP 引脚配置
| 引脚 1 | VCC — Supply voltage (4.85 V to 5.35 V) |
| 引脚 2 | GND — Ground reference |
| 引脚 3 | VOUT — Analog ratiometric 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) |
| 引脚 7 | NC — Not connected (per datasheet) |
| 引脚 8 | NC — Not connected (per datasheet) |
典型应用
MPXA4115AP 适用于 6 应用s: Manifold Absolute Pressure (MAP) Sensing, Handheld Altimeter / Barometer, Weather Station Barometer, Industrial Process Pressure Monitoring, HVAC Air-Flow / Duct Pressure Monitoring, Medical Respiratory / CPAP Pressure Monitoring.
Manifold Absolute Pressure (MAP) Sensing
The MPXA4115AP fits engine MAP sensing because its 15-115 kPa absolute range and ratiometric 0.2-4.8 V output span naturally aspirated and forced-induction manifold pressures. The 8-SMD side-port package bolts onto the intake manifold with a 3.17 mm tube, and the on-chip temperature compensation holds accuracy from 0-85 °C without in-system trimming. According to the NXP datasheet, the transducer provides 400 kPa overload protection for transient spikes common in turbocharged applications.
推荐
Handheld Altimeter / Barometer
The MPXA4115AP is designed for handheld altimeter and barometer products per the NXP datasheet. Its 15-115 kPa range covers sea-level through roughly 10 km altitude, and the factory calibration eliminates user trim. The ratiometric 0.2-4.8 V output feeds directly into a low-power ADC such as those integrated in Kinetis or LPC microcontrollers, simplifying BOM and reducing assembly cost.
推荐
Weather Station Barometer
The MPXA4115AP delivers reliable barometric pressure readings for amateur and consumer weather stations. Its 15-115 kPa span covers the meteorological envelope, and the 0.2-4.8 V ratiometric output is straightforward to digitize with a 10-12 bit ADC. The 8-SMD side-port package and 3.17 mm tube fitting allow sealed enclosure mounting while exposing the silicon diaphragm to outside air through a Gore-Tex vent.
推荐
Industrial Process Pressure Monitoring
The MPXA4115AP suits low-pressure industrial process instrumentation where absolute pressure references are required. Its 0.2-4.8 V analog output drives 4-20 mA loop converters or PLC analog inputs directly, while on-chip calibration eliminates field calibration steps. The 8-SMD side-port package with 3.17 mm tube fitting integrates into panel-mount manifolds, and the 400 kPa overload rating protects against pressure transients in pneumatic systems.
推荐
HVAC Air-Flow / Duct Pressure Monitoring
The MPXA4115AP monitors duct and filter differential or absolute pressures in HVAC systems. Its low-end 15 kPa sensitivity supports static pressure measurements across fans, filters, and coils, while the on-chip temperature compensation prevents drift across supply and return air streams. The 8-SMD side-port package mounts directly on a manifold tap with a 3.17 mm tube, and the 0.2-4.8 V output feeds building automation controllers.
推荐
Medical Respiratory / CPAP Pressure Monitoring
The MPXA4115AP can measure airway pressure in CPAP/BiPAP machines and ventilators where the 15-115 kPa range covers patient breathing pressures. Its ratiometric analog output provides a noise-tolerant signal that can be conditioned with an instrumentation amplifier and digitized by an MCU or dedicated AFE. The 8-SMD side-port package with 3.17 mm tube fitting integrates inline with breathing circuit tubing, and on-chip temperature compensation ensures stable readings across multi-hour therapy sessions.
推荐
推荐产品汇总
工程参考数据： MPXA4115AP ——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 | MPXA4115A6U | MPXA4115A6T1 | MPXAZ4115A6T1 | MPXA6115AC6T1 |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 8-SMD, Gull Wing, Side Port | 8-SMD, Gull Wing, Side Port - same | 8-SMD, Gull Wing, Side Port - same | 8-SMD, Gull Wing, Side Port - same | 8-SMD, Gull Wing, Side Port - same |
| Operating Pressure Range | 15 kPa to 115 kPa | 15 kPa to 115 kPa | 15 kPa to 115 kPa | 15 kPa to 115 kPa | 15 kPa to 150 kPa |
| Output Voltage Range | 0.2 V to 4.8 V | 0.2 V to 4.8 V | 0.2 V to 4.8 V | 0.2 V to 4.8 V | 0.2 V to 4.8 V |
| Pressure Type | Absolute | Absolute | Absolute | Absolute | Absolute |
| Supply Voltage | 4.85 V to 5.35 V | 4.85 V to 5.35 V | 4.85 V to 5.35 V | 4.85 V to 5.35 V | 4.85 V to 5.35 V |
| Port Style | Side port | Side port | Side port | Side port (Z orientation) | Side port |
关键差异点
- Calibrated on-chip temperature compensation （对比 MPX5500DP)
- 15-115 kPa span optimized for atmospheric/altitude work （对比 MPXA6115AC6T1)
- Side-port package with integrated 3.17 mm tube fitting （对比 MPXAZ4115A6T1)
设计说明
Decouple the VCC pin (pin 1) with a 0.1 µF ceramic capacitor placed within 3 mm of the supply lead, and add a 10 µF bulk capacitor near the supply source. The ratiometric output means the analog signal tracks VDD, so any supply noise above 1 kHz must be filtered to maintain accuracy. Use a low-dropout 5 V regulator with PSRR > 40 dB at 100 kHz to keep sensor noise out of the output.
Route the analog output trace on an inner PCB layer or away from switching nodes, and guard the output with ground pour on both sides. The side-port tube interface requires 5 mm minimum mechanical clearance around the port for the 3.17 mm male tube fitting; do not place tall components adjacent to the port. Seal the bottom of the sensor against conformal coating if exposed to condensing humidity.
Add a 100 Ω series resistor and 1 nF capacitor to ground on the analog output to form a low-pass filter at approximately 1.6 MHz. This attenuates RF noise pickup from the tube and wiring harness without affecting the DC transfer function. Place the RC network within 5 mm of the sensor output pin and route the filtered signal to the ADC input.
Do not block the side-port tube inlet with conformal coating, potting compound, or screw heads - the silicon diaphragm must see the applied pressure unimpeded. Do not connect the sensor to pressurized media above 400 kPa or to corrosive gases; the gel isolation protects the die but is not rated for all media. Finally, do not power the sensor below 4.85 V or above 5.35 V, as the ratiometric calibration assumes a 5 V nominal supply per the NXP datasheet.
合规信息
RoHS compliant per NXP product page. Not AEC-Q100 qualified - consider MPXA4115AP automotive variants for engine ECU applications. Halogen-free status not explicitly listed in retrieved data.
