MPXAZ4115A6U - 15-115kPa Absolute Pressure Sensor | NXP
MPN: MPXAZ4115A6U ✓ Hoạt độngMPXAZ4115A6U Tóm tắt
An absolute pressure sensor measures pressure referenced to a sealed internal vacuum, making it ideal for applications where barometric or altitude-corrected readings are required. Absolute pressure sensors sit in the transducer family beneath the wider category of pressure sensors and transducers, enabling direct ADC interfacing without bridge excitation amplifiers.
Key features include on-chip signal conditioning, factory temperature compensation from 0C to +85C, and a media-resistant port that tolerates humid and mildly contaminated air. The transfer function is approximately linear at 46.4 mV/kPa, allowing straightforward conversion from output voltage to pressure. Integrated bipolar op-amp and thin-film resistor networks eliminate external compensation components and reduce PCB footprint compared to discrete bridge sensor designs.
The device integrates a single piezoresistive bridge, an instrumentation amplifier, a temperature compensation network, and a calibration trim network on the same silicon die. Calibration is performed during manufacturing, yielding typical accuracy better than +/-1.5% over the compensated temperature range, which is sufficient for altimeter, barometer, weather station, and industrial manifold absolute pressure (MAP) applications without user-side calibration.
Typical applications include automotive manifold absolute pressure sensing, handheld altimeters and barometric altimetry, GPS-augmented navigation altitude correction, weather stations and HVAC control, and portable medical pneumatic devices. The wide 15-115 kPa span covers sea-level barometric pressure (~101.325 kPa) up to altitudes above 9000 m with margin.
When designing with this part, place 100 nF and 470 pF decoupling capacitors as close to VCC and GND pins as possible to reject supply noise. Avoid exposing the port to direct water jets or condensing humidity beyond the media-resistant specification. For high-accuracy altimeter designs, apply per-unit calibration lookup tables in software to compensate residual non-linearity.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that complement the NXP datasheet and accelerate time-to-design for absolute-pressure instrumentation.
Bộ thay thế dễ dàng lắp đặt cho MPXAZ4115A6U — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MPXAZ4115A6U (cùng hình factor và footprint) — khác nhau ở Port Style, Output Type, Supply Voltage, Accuracy, Package / Case.
MPXAZ4115A6T1
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MPXA4250A6U
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MPXAZ6115A7U
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →MPXAZ4115A6
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MPXA4100A6U
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →MPXAZ4115A6U Tỷ lệ tối đa & tính chất điện
| Pressure Type | Absolute |
| Operating Pressure Range | 15 kPa to 115 kPa (2.18 PSI to 16.68 PSI) |
| Khoảng điện áp đầu ra | 0.2 V to 4.8 V |
| Supply Voltage Range | 4.85 V to 5.35 V |
| Sensitivity | 46.4 mV/kPa (nominal) |
| Accuracy | +/-1.5% over 0C to +85C (typical) |
| Khoảng nhiệt độ hoạt động | -40C to +125C |
| Port Type | Media-resistant axial port |
| Hộp / Vỏ | 8-SMD Gull Wing module |
| Kiểu lắp đặt | Surface Mount |
| Kiểu đầu ra | Analog (calibrated, ratiometric) |
| Media Resistant | Yes (humid and mild contaminants) |
| Integrated Signal Conditioning | Yes (on-chip amplifier, temperature compensation, calibration) |
| Off-Chip Calibration Required | No (factory trimmed) |
| Trạng thái RoHS | Compliant |
| Lead Free | Yes |
Cấu hình chân MPXAZ4115A6U
| Chân 1 | VCC — Supply voltage (4.85 V to 5.35 V) |
| Chân 2 | GND — Ground reference |
| Chân 3 | VOUT — Calibrated analog output (0.2 V to 4.8 V) |
| Chân 4 | NC — Not connected (per datasheet) |
| Chân 5 | NC — Not connected (per datasheet) |
| Chân 6 | NC — Not connected (per datasheet) |
| Chân 7 | NC — Not connected (per datasheet) |
| Chân 8 | GND — Ground reference (symmetric layout) |
Ứng dụng tiêu biểu
MPXAZ4115A6U phù hợp cho 6 Áp dụngs: Automotive Manifold Absolute Pressure Sensing, Handheld Barometric Altimeter, GPS-Augmented Altitude Correction, Weather Station Barometry, HVAC Duct Pressure Monitoring, Portable Medical Respiration Pressure.
Automotive Manifold Absolute Pressure Sensing
The MPXAZ4115A6U's 15-115 kPa span covers full manifold vacuum at idle and maximum boost pressure on naturally aspirated or mild-boost engines, while the calibrated 0.2-4.8 V output drives ECUs directly via built-in ADC channels. Placed after the intake manifold with a media-resistant port, the sensor feeds fuel-mapping and ignition-timing algorithms; unlike raw piezoresistive bridges, it requires no external instrumentation amplifier, cutting BOM cost and board area per the NXP datasheet recommended MAP circuit.
Được đề xuất
Handheld Barometric Altimeter
The 0.2-4.8 V linear analog output spans the entire atmospheric pressure range from approximately 9000 m altitude down to sea level, with 46.4 mV/kPa sensitivity simplifying ADC conversion firmware on low-power MCUs. The MPXAZ4115A6U's calibrated 1.5% accuracy and integrated temperature compensation remove the need for per-unit atmospheric lookup tables; with a 100 nF decoupling capacitor and sleep-mode cycling it can run for months on coin cells per typical NXP portable-instrument reference designs.
Được đề xuất
GPS-Augmented Altitude Correction
Barometric augmentation helps GPS receivers resolve altitude ambiguities during weak-signal conditions, and the MPXAZ4115A6U's 1.5% accuracy translates to roughly +/-8 m of altitude resolution well within GPS acceptance thresholds. Its 5 V supply, on-chip signal conditioning, and 8-SMD gull-wing footprint suit PCBs already running at 5 V logic; a software lookup converts the analog voltage to pressure-corrected altitude data per the NXP datasheet transfer function.
Được đề xuất
Weather Station Barometry
Station pressure measurements require millibar-level resolution and clean temperature-stable readings to feed weather-prediction algorithms, which the MPXAZ4115A6U's 15-115 kPa span and calibrated accuracy serve directly. Compared to raw bridge sensors that need cold-junction compensation and per-unit linearization, this part delivers a clean ratiometric 0.2-4.8 V signal to a weather-station MCU's ADC, with the media-resistant port tolerating outdoor humid-air exposure per the NXP datasheet.
Được đề xuất
HVAC Duct Pressure Monitoring
Building-automation controllers use duct static pressure to balance airflows, and the MPXAZ4115A6U's media-resistant port and millivolt-per-kilopascal output suit inline HVAC ducts operating at low static pressures. Its built-in amplifier rail eliminates external instrumentation stages that would otherwise pick up 50/60 Hz mains noise on long sensor runs; decoupling capacitors placed close to VCC/GND pins per the NXP datasheet layout ensure stable readings in electrically noisy rooftop environments.
Được đề xuất
Portable Medical Respiration Pressure
Medical respiration circuits and CPAP systems demand low-pressure barometric correction and humid media tolerance, both delivered by the MPXAZ4115A6U's media-resistant port and 15-115 kPa calibrated output. The integrated temperature compensation reduces drift across the warm-up cycle of breathing circuits, and the 8-SMD gull-wing package meets surface-mountable medical-device assembly requirements; this part is referenced in many NXP application notes for low-pressure medical instrumentation per the datasheet design guidance.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MPXAZ4115A6U — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MPXAZ4115A6T1 | MPXA4250A6U | MPXAZ6115A7U | MPXAZ4115A6 | MPXA4100A6U |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 8-SMD Gull Wing | 8-SMD Gull Wing - same | 8-SMD Gull Wing - same | 8-SMD Gull Wing - same | 8-SMD Gull Wing - same | 8-SMD Gull Wing - same |
| Pressure Type | Absolute | Absolute | Absolute | Absolute | Absolute | Absolute |
| Pressure Range | 15 kPa to 115 kPa | 15 kPa to 115 kPa | 20 kPa to 250 kPa | 15 kPa to 115 kPa | 15 kPa to 115 kPa | 20 kPa to 105 kPa |
| Packaging Variant | Tube (-U) | Tape & Reel (3000) | Tube (-U) | Tape & Reel (-7U) | Reel (13-inch) | Tube (-U) |
Bảo phân biệt quan trọng
- Media-resistant port tolerates humid and mildly contaminated environments without hydrophobic filter (vsMPXA4250A6U)
- Full 15-115 kPa range covers sea-level barometric and full vacuum without range changeover (vsMPXA4100A6U)
- On-chip signal conditioning eliminates external instrumentation amplifier stage (vsDiscrete bridge-sensor front end)
Ghi chú thiết kế
Place a 100 nF ceramic decoupling capacitor as close as possible to the VCC pin and a 470 pF capacitor on the GND return to reject supply-line noise. The MPXAZ4115A6U is ratiometric, so 5 V supply ripple directly modulates the output - filtered regulators (LDOs such as the AP2112 or LCSC-grade AMS1117-5.0) are recommended over noisy switching regulators at the supply rail per the NXP application note.
Keep the analog output trace short and away from digital high-speed lines to avoid coupling. The 8-SMD gull-wing module exposes pads only on one face; provide thermal relief spokes and a small copper pour under the package to act as a partial thermal heat-sink without stressing the gull-wing leads during reflow per the NXP datasheet board-layout guidelines.
Do not obstruct the axial pressure port - mounting the sensor with the port facing directly into a fan or air-jet can cause dynamic noise pickup and dynamic-pressure misreadings. For weather stations, add a small wind-screen; for HVAC ducts, respect minimum straight run lengths to ensure laminar flow; for handheld altimeters, calibrate at known elevations to remove residual non-linearity and offset per typical NXP altimeter reference designs.
Thông tin tuân thủ
RoHS and lead-free per NXP product environmental information. AEC-Q100 not specifically stated; consult NXP automotive product line for AEC-Q qualified variants.
