MPXAZ6115A7U - 15-115 kPa Absolute Pressure Sensor | NXP
料号： MPXAZ6115A7U ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $17.5 | $17.50 |
| 10 | $15.2 | $152.00 |
| 100 | $13.05 | $1,305.00 |
| 500 | $11.5 | $5,750.00 |
| 1,000 | $10.1 | $10,100.00 |
MPXAZ6115A7U 概述
An absolute pressure sensor is a transducer that measures pressure referenced to a perfect vacuum rather than ambient atmosphere. Absolute pressure sensors integrate on-chip bipolar op-amp signal conditioning and thin-film resistor networks, producing a high-level linear analog output. Pressure sensors belong to the sensor hierarchy: pressure transducer > absolute pressure sensor > MEMS pressure sensor > integrated silicon pressure sensor > semiconductor IC. They are commonly used in applications where accurate absolute pressure (barometric or sealed system) is required rather than gauge pressure.
Key features include a pressure range of 15 to 115 kPa, an output span of approximately 4.5 V across the full range, and typical sensitivity of about 45.9 mV/kPa. The on-chip temperature compensation delivers ±1.5% accuracy over 0C to +85C. The device operates from a single 5 V supply (typical) and provides an ratiometric output that tracks the supply voltage. Media-resistant construction tolerates non-corrosive gases and dry air.
The MPXAZ6115A7U uses NXP's proprietary piezoresistive MEMS sensing element combined with bipolar op-amp signal conditioning on a single silicon die. This monolithic integration eliminates external compensation components and delivers a calibrated, linear output ready for direct ADC input. The X-ducer top-port package routes media to the top of the die through a 0.13" (3.17 mm) axial tube port.
Typical applications include barometric pressure measurement for weather stations and altimeters, HVAC pressure monitoring, medical respiratory equipment, tire pressure monitoring, and industrial process control. The wide 100 kPa operating span suits atmospheric-pressure sensing at altitudes from below sea level to high-altitude applications.
When designing with this sensor, use a low-impedance buffer (such as a 10 kOhm or smaller op-amp follower) between the sensor output and the ADC input to drive ADC sample capacitors without loading the output stage. A 100 nF decoupling capacitor placed close to the VCC pin is recommended. For battery-powered applications, the sensor can be powered only during sampling to minimize average supply current.
This page synthesizes distributor pricing, drop-in alternatives from the NXP MPXxxx6115A family, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： MPXAZ6115A7U ——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： MPXAZ6115A7U （相同外形与封装尺寸） ——差异在于 Accuracy, Port Style, Supply Voltage, Package, Signal Conditioning.
快速对比工具——选择替代料号进行并排对比：
MPXAZ6115A6U
✅ 直接替换✓ 有现货
$9.85 / 个
查看数据手册 →MPXAZ6115AC7U
✅ 直接替换📋 参考替代料（不在目录中）
MPXAZ6115AC6U
✅ 直接替换✓ 有现货
$8.4 / 个
查看数据手册 →MPXAZ6115AP
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$10.3 / 个
查看数据手册 →MPXA6115AC6U
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$9.95 / 个
查看数据手册 →MPXAZ6115A7U 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) |
| Operating Pressure Min | 15 kPa |
| Operating Pressure Max | 115 kPa |
| 输出类型 | Analog Voltage |
| 输出电压范围 | 0.2 V to 4.7 V |
| 电源电压 | 5.0 V typical |
| Accuracy | ±1.5% (0C to 85C, after NXP factory calibration) |
| 工作温度 | -40C to +125C |
| Port Style | Top axial tube, 0.13" (3.17 mm) diameter |
| 封装 / 外壳 | 8-DIP Module (0.560 inch, 14.22 mm) |
| 安装类型 | Through-Hole |
| Media Compatibility | Non-corrosive dry gases (media resistant) |
| Signal Conditioning | On-chip bipolar op-amp + thin-film resistor network |
| Temperature Compensation | On-chip, factory calibrated |
| RoHS 状态 | Compliant |
MPXAZ6115A7U 引脚配置
| 引脚 1 | Vout — Analog ratiometric pressure output (0.2 V to 4.7 V) |
| 引脚 2 | GND — Ground reference |
| 引脚 3 | Vcc — 5 V supply input |
| 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
MPXAZ6115A7U 适用于 7 应用s: Barometric Weather Station, HVAC Altimeter Calculator / Altitude Sensor, Medical Respiratory Equipment, Industrial Process Control, Tire Pressure Monitoring System (TPMS), Smartphone Altimeter / Wearable Barometer, VAV (Variable Air Volume) HVAC Damper Control.
Barometric Weather Station
The MPXAZ6115A7U's 15-115 kPa absolute pressure range is perfectly aligned with barometric pressure at all habitable altitudes (from below sea level Dead Sea at ~106 kPa to high-altitude La Paz at ~60 kPa). The 4.5 V output span across 100 kPa gives ~45 mV/kPa sensitivity, which after a 10-bit ADC yields ~0.1 kPa per LSB resolution. Placed on the weather station main board with a sealed vent to atmosphere, the output feeds an MCU ADC for pressure logging. The on-chip temperature compensation delivers ±1.5% accuracy from 0C to +85C, covering all outdoor deployment temperatures without external analog conditioning.
推荐
HVAC Altimeter Calculator / Altitude Sensor
Using the barometric formula, altitude can be computed from absolute pressure: altitude = 44330 x (1 - (P/101.325)^(1/5.255)). The MPXAZ6115A7U's 0.2-4.7 V output across 15-115 kPa lets a 12-bit ADC compute altitude from -200 m below sea level to over 9000 m altitude. With ±1.5% accuracy this yields approximately ±150 m absolute altitude error, suitable for hobby drones, model rockets, and hiking GPS augmenters. Best deployed with a low-drift reference and periodic ground-level calibration.
推荐
Medical Respiratory Equipment
Continuous positive airway pressure (CPAP) and bilevel machines monitor patient breathing circuit pressure in absolute terms to detect mask leaks, apnea events, and titration pressure. The MPXAZ6115A7U's 15-115 kPa range covers all clinical pressures with 0.1 kPa resolution after amplification, while the medical-grade ±1.5% accuracy supports clinical-grade pressure verification. The media-resistant package tolerates humidified breathing gases without damage. Plumbed inline with the breathing circuit via silicone tubing and the 3.17 mm axial tube port, the output feeds a dedicated pressure ADC for closed-loop pressure control.
推荐
Industrial Process Control
Sealed industrial process vessels and vacuum chambers require absolute pressure monitoring independent of atmospheric variation. The MPXAZ6115A7U's absolute reference (vs gauge) ensures readings remain stable as barometric pressure shifts with weather, eliminating the false alarms common to gauge sensors in outdoor process installations. The 0-5 V analog output interfaces directly with PLC analog input modules (with appropriate scaling resistor) or industrial 4-20 mA transmitters via a V-to-I converter.
推荐
Tire Pressure Monitoring System (TPMS)
Although modern automotive TPMS uses wireless sensors, the MPXAZ6115A7U is well suited for shop-floor tire inflation equipment and aftermarket stationary TPMS test rigs. The 15-115 kPa range covers all passenger tire pressures (typical 200-250 kPa gauge, which translates to ~300-350 kPa absolute - requiring a higher-range variant, but the MPXAZ6115A7U is ideal for the low-pressure absolute baseline measurement in mixed-range systems).
推荐
Smartphone Altimeter / Wearable Barometer
Battery-powered wearables benefit from the MPXAZ6115A7U's ability to be powered only during sampling intervals. By strobing the 5 V supply at 1 Hz with 10 ms on-time, average supply current drops to under 50 uA, enabling months of operation on a coin cell. The 4.5 V output span over 100 kPa provides >40 mV/kPa sensitivity - sufficient for 0.1 m elevation detection after 12-bit oversampling.
推荐
VAV (Variable Air Volume) HVAC Damper Control
Commercial HVAC variable air volume boxes use absolute pressure across the damper to compute airflow. The MPXAZ6115A7U provides a stable absolute reference independent of building altitude, simplifying commissioning for rooftop installations at varying elevations. The 5 V ratiometric output feeds a 24-bit sigma-delta ADC (like the MAX11270) for sub-Pa resolution airflow calculation when paired with a precision pitot tube differential pickup.
推荐
推荐产品汇总
工程参考数据： MPXAZ6115A7U ——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 | MPXAZ6115A6U | MPXAZ6115AC7U | MPXAZ6115AC6U | MPXAZ6115AP | MPXA6115AC6U |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same |
| Package | 8-DIP Module (14.22 mm) | 8-DIP Module - same | 8-DIP Module - same | 8-DIP Module - same | 8-DIP Module - same | 8-DIP Module - same |
| Pressure Range (kPa) | 15-115 | 15-115 | 15-115 | 15-115 | 15-115 | 15-115 |
| Output Voltage Span | 0.2 V - 4.7 V | 0.2 V - 4.7 V | 0.2 V - 4.7 V | 0.2 V - 4.7 V | 0.2 V - 4.7 V | 0.2 V - 4.7 V |
| Supply Voltage | 5.0 V | 5.0 V | 5.0 V | 5.0 V | 5.0 V | 5.0 V |
| Pressure Type | Absolute | Absolute | Absolute | Absolute | Absolute | Absolute |
| Port Style | Top axial tube (T-port) | Dual side port | Axial side port (no tube) | Single side port (no tube) | No port (bare element) | Single side port (no tube) |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
关键差异点
- Top axial tube port for direct tubing connection （对比 MPXAZ6115A6U)
- On-chip signal conditioning eliminates external op-amps （对比 MPX4250AP)
- NXP Freescale legacy reliability and active production （对比 Bosch BMP280)
- Absolute reference eliminates altitude-dependent error （对比 MPXxxxxx0001 gauge sensor)
设计说明
Place a 100 nF ceramic decoupling capacitor as close as possible to pin 3 (Vcc) and a 10 uF bulk tantalum or ceramic capacitor on the 5 V rail. The MPXAZ6115A7U's internal bipolar op-amps draw brief current spikes during output transitions; inadequate decoupling injects noise into the analog output. Route the Vout trace away from switching converter inductors or digital clock lines; a ground guard trace around the Vout pin reduces coupled noise by 10-15 dB.
Estimated: At a 5 V supply, the sensor output impedance is approximately 1-2 kOhm. Driving a 10-bit ADC with 10 kOhm input impedance forms a 1:5 voltage divider, losing ~14% of full-scale accuracy. Insert an op-amp voltage follower (MCP6001, LM358, or OPA2333) with input impedance >1 GOhm between the sensor output and the ADC. For 12-bit or higher resolution ADCs, this buffer is mandatory to achieve rated accuracy.
The MPXAZ6115A7U includes on-chip temperature compensation from 0C to +85C. Below 0C, expect an additional ±1.5% drift; above 85C, the error grows nonlinearly. For outdoor deployments spanning -40C to +85C, apply a software compensation using a paired temperature sensor (e.g. MAX31865) to subtract the residual temperature error. The sensor itself does not require a heatsink - quiescent current is ~5 mA and self-heating is negligible.
Do NOT apply voltage to the Vout pin; the MPXAZ6115A7U output stage can source or sink but not block external voltages. Do NOT use the sensor with liquid media unless the datasheet explicitly approves it - the standard package is for dry non-corrosive gases only. For vacuum applications, ensure all tubing connections are leak-free; the absolute reference is internal and cannot be recalibrated in the field.
合规信息
RoHS compliant per NXP product page and DigiKey/Mouser listings. Lead-free matte-tin plating on DIP pins. MSL 1 (unlimited floor life). REACH compliant; conflict-mineral reporting available from NXP upon request. Not AEC-Q100 qualified - select MPXAZ6115A7U for industrial/consumer; for automotive TPMS, choose a dedicated wireless TPMS sensor.
