MPXAZ4115AC6U - 15-115kPa Absolute Pressure Sensor | NXP
MPN: MPXAZ4115AC6U ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.1 | $161.00 |
| 100 | $13.65 | $1,365.00 |
| 500 | $12.25 | $6,125.00 |
| 1,000 | $10.95 | $10,950.00 |
MPXAZ4115AC6U Overview
A pressure sensor is a transducer that converts an applied mechanical pressure into a proportional electrical signal. Absolute pressure sensors reference a sealed internal vacuum cavity, so the output corresponds to pressure relative to absolute zero rather than to ambient atmospheric pressure. Within the broader sensor taxonomy, this device sits in the piezoresistive family, where silicon strain gauges arranged in a Wheatstone bridge change resistance with membrane deflection. NXP's MPXAZ series adds on-chip thin-film calibration resistors, temperature compensation, and a signal-conditioning amplifier, producing a ratiometric analog output that interfaces directly with an ADC, microcontroller, or analog comparator.
Key differentiating features include a calibrated accuracy of approximately ±1.5% across the full pressure range, operating temperature coverage from -40°C to +125°C, a supply voltage range of 4.85 V to 5.35 V, and a top-side male port with a 3.17 mm (0.13 in) tube stub that accepts media-resistant tubing. The 8-SMD gull-wing package supports surface-mount assembly and reflow soldering, while the integrated calibration eliminates external compensation components. The output stage is ratiometric to VCC, simplifying ADC scaling in 5 V microcontroller systems.
Internally, the MPXAZ4115AC6U uses a single-crystal silicon diaphragm with diffused piezoresistors whose resistance changes with strain. The on-chip CMOS signal conditioner performs offset trim, span calibration, and temperature compensation using laser-trimmed thin-film resistors, yielding a factory-calibrated transfer function that requires no external components other than decoupling capacitors. The top port design places the pressure inlet on the package top, which simplifies pneumatic connection and protects the sensing element from board-side contamination.
Typical applications include automotive manifold absolute pressure (MAP) sensing, motorcycle and small-engine fuel management, altimeters and barometric reference systems, weather stations and indoor pressure monitors, HVAC pressure monitoring, and industrial process control. In automotive MAP applications, the wide temperature range and media-resistant port allow direct pneumatic connection to the intake manifold.
When designing with this part, ensure the supply voltage stays within 4.85 V to 5.35 V and provide at least 100 nF of supply decoupling adjacent to the device. The output is ratiometric to VCC, so a stable 5 V rail is essential for accurate readings. Avoid exposing the port to condensing moisture or conductive contaminants unless the media-resistant tubing variant is used.
This page synthesizes distributor pricing from DigiKey and Mouser, NXP and Freescale legacy datasheet specifications, drop-in alternative cross-references, and practical design notes not found in a single manufacturer document.
Drop-in alternatives for MPXAZ4115AC6U — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MPXAZ4115AC6U (same form factor and footprint) — differing in Supply Voltage, Output Type, Output Voltage Range, Port Style, Signal Conditioning.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MPXA6115AC6U
✅ Drop-In✓ In Stock
$9.95 / Unit
View Datasheet →MPXH6115AC6U
✅ Drop-In✓ In Stock
$5.75 / Unit
View Datasheet →MPXAZ4100AC6U
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.45 / Unit
View Datasheet →MPXAZ5100AC6U
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MPXAZ6115AC6U
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$8.4 / Unit
View Datasheet →MPXAZ4250AC6U
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MPXAZ4115AC6U Maximum Ratings & Electrical Characteristics
| Pressure Type | Absolute |
| Pressure Range | 2.18 PSI to 16.68 PSI (15 kPa to 115 kPa) |
| Output Type | Analog Voltage |
| Output Voltage Range | 0.2 V to 4.8 V |
| Supply Voltage | 4.85 V to 5.35 V (5 V typical) |
| Accuracy | ±1.5% |
| Port Style | Top port, Male - 0.13 in (3.17 mm) tube stub |
| Port Style Detail | Barbless |
| Operating Temperature | -40 °C to +125 °C |
| Package | 8-SMD, Gull Wing, Top Port |
| Case Outline | CASE 482A (Small Outline Package) |
| Mounting Type | Surface Mount |
| Sensing Technology | Piezoresistive silicon, on-chip signal conditioned |
| Features | Temperature compensated, calibrated, media resistant |
MPXAZ4115AC6U Pin Configuration
| Pin 1 | VCC — 5 V supply input (4.85 V to 5.35 V) |
| Pin 2 | GND — Supply and signal ground |
| Pin 3 | VOUT — Analog pressure output (0.2 V to 4.8 V, ratiometric) |
| Pin 4 | NC — No connection (per CASE 482A pinout) |
| Pin 5 | NC — No connection (per CASE 482A pinout) |
| Pin 6 | NC — No connection (per CASE 482A pinout) |
| Pin 7 | NC — No connection (per CASE 482A pinout) |
| Pin 8 | NC — No connection (per CASE 482A pinout) |
Typical Applications
MPXAZ4115AC6U is suitable for 7 applications: Automotive MAP (Manifold Absolute Pressure) Sensing, Altimeter / Barometric Pressure Reference, Weather Station and Indoor Pressure Monitor, HVAC Pressure Monitoring, Industrial Process Control and Vacuum Monitoring, Drone Altitude Hold and Flight Control, Medical Respiratory Equipment.
Automotive MAP (Manifold Absolute Pressure) Sensing
The MPXAZ4115AC6U's 15-115 kPa absolute pressure range and -40C to +125C operating temperature make it a natural fit for automotive manifold absolute pressure sensing, where it measures intake-manifold pressure to enable ECU fuel-injection and ignition-timing calculations. The on-chip signal conditioning and ratiometric 0.2 V to 4.8 V output interface directly with 5 V automotive microcontrollers and ADCs without external op-amps. The 'AZ' media-resistant gel topping isolates the sensing die from fuel vapor and intake condensation, a critical feature for under-hood environments. Connected via 3.17 mm tubing to the intake manifold, it provides the closed-loop feedback required for modern electronic fuel-injection systems and OBD-II diagnostics.
Recommended
Altimeter / Barometric Pressure Reference
For altimeter and barometer designs, the MPXAZ4115AC6U's absolute pressure range covers sea-level (~101 kPa) through high-altitude (~13 km) measurements with comfortable margin. The factory calibration eliminates the offset trimming required by raw piezoresistive sensors, simplifying firmware. A 12-bit ADC at 5 V reference resolves pressure in approximately 0.024 kPa steps, equivalent to roughly 2 meters of altitude near sea level. Designers typically pair it with a microcontroller hosting a barometric pressure formula like the hypsometric equation. Compared with hobby-grade BMP280/BMP180 modules, the MPXAZ4115AC6U offers wider temperature range and industrial-grade robustness.
Recommended
Weather Station and Indoor Pressure Monitor
The MPXAZ4115AC6U serves as the absolute pressure reference in weather stations, where its temperature-compensated output yields accurate barometric readings for short-term weather forecasting. The 0.2 V to 4.8 V analog output feeds 5 V microcontrollers and inexpensive 10-bit ADC inputs, sufficient to track millibar-level pressure fronts. With ±1.5% accuracy and an operating temperature window of -40C to +125C, it tolerates outdoor weather exposure when housed in a vented enclosure. The top-mounted port accepts standard 3.17 mm tubing to a sealed weatherproof reference cell, allowing remote sensor placement from the host PCB.
Recommended
HVAC Pressure Monitoring
In heating, ventilation, and air-conditioning systems, the MPXAZ4115AC6U measures duct static pressure, filter clogging differential, and refrigerant manifold pressure within a 15-115 kPa window. Its wide operating temperature range allows placement near furnace headers or rooftop units. A 5 V microcontroller with a 12-bit ADC samples the ratiometric output and computes airflow or filter health from the pressure drop. Compared with industrial-grade pressure transmitters, this sensor integrates calibration on-chip, reducing BOM count and design footprint for cost-sensitive HVAC controllers.
Recommended
Industrial Process Control and Vacuum Monitoring
The MPXAZ4115AC6U's lower limit at 15 kPa enables light-vacuum monitoring in pick-and-place suction systems, vacuum pumps, and packaging machinery, while its 115 kPa upper bound covers low-pressure pneumatic lines. The -40C to +125C rating suits factory-floor environments, and the on-chip amplifier eliminates in-amplifier stages often required with bare sensor cells. Analog output couples with PLC analog input modules or industrial 4-20 mA transmitters via a scaling resistor, supporting legacy SCADA interfaces.
Recommended
Drone Altitude Hold and Flight Control
The MPXAZ4115AC6U provides barometric altitude reference data for multirotor drones, enabling altitude-hold flight modes and supporting inertial navigation units where GPS lock is weak. Its low mass (sub-gram), 5 V supply, and small 8-SMD footprint allow integration onto flight-controller PCBs without significant weight penalty. The ±1.5% accuracy translates to roughly ±20 m of altitude error at sea level, which is acceptable for altitude hold but typical pilots pair it with a laser or ultrasonic rangefinder for low-altitude precision. The wide temperature tolerance supports both cold-air and hot-asphalt operation conditions encountered in consumer drones.
Recommended
Medical Respiratory Equipment
Medical respiratory devices use the MPXAZ4115AC6U to monitor circuit pressure in CPAP machines, ventilators, and anesthesia systems within its 15-115 kPa range. The on-chip temperature compensation maintains accuracy under changing ambient conditions in clinical settings. Analog output simplifies integration with 5 V medical-grade microcontrollers and supports optional signal isolation through a small isolation amplifier. Designers must validate media resistance for humidified gas streams and add a hydrophobic barrier to the top port for infection control compliance.
Recommended
Recommended Products Summary
Engineering reference data for MPXAZ4115AC6U — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MPXA6115AC6U | MPXH6115AC6U | MPXAZ4100AC6U | MPXAZ5100AC6U | MPXAZ6115AC6U |
|---|---|---|---|---|---|---|
| Package | 8-SMD Gull Wing, Top Port (CASE 482A) | 8-SMD Gull Wing, Top Port (CASE 482A) - same | 8-SMD Gull Wing, Top Port - same family | 8-SMD Gull Wing, Top Port - same CASE | 8-SMD Gull Wing, Top Port - same CASE | 8-SMD Gull Wing, Top Port - same CASE |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Pressure Range | 15 to 115 kPa | 15 to 150 kPa (wider) | 15 to 150 kPa (wider) | 20 to 105 kPa (narrower) | 50 to 105 kPa (narrower, barometer) | 15 to 150 kPa (wider) |
| Supply Voltage | 4.85 V to 5.35 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.85 V to 5.35 V | 4.85 V to 5.35 V | 4.75 V to 5.25 V |
| Accuracy | ±1.5% | ±1.5% | ±1.5% | ±1.5% | ±1.5% | ±1.5% |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C |
| On-Chip Signal Conditioning | Yes (calibrated, temperature compensated) | Yes | Yes | Yes | Yes | Yes |
| Media-Resistant Gel | Yes (AZ family) | No (A family - non-gel) | Yes (H family - gel) | Yes | Yes | Yes |
Key Differentiators
- Media-resistant gel topping for harsh media (vs MPXA6115AC6U)
- Wider pressure range than MPXAZ4100AC6U (vs MPXAZ4100AC6U)
- Lower-temperature operation than MPXA4250AC6U family (vs MPXAZ4250AC6U)
Design Notes
Provide a tightly regulated 4.85 V to 5.35 V supply, since the MPXAZ4115AC6U output is ratiometric to VCC. Estimated: a 5% drop in supply produces a proportional 5% error in pressure reading. Place a 100 nF ceramic decoupling capacitor adjacent to the VCC and GND pins and a larger 1-10 uF bulk capacitor within 25 mm of the part to suppress transient current draw during ADC sampling edges.
The output is NOT a digital signal - do not connect directly to a digital GPIO. Route to an analog-capable ADC input. Avoid high-impedance long traces; use a ground-reference trace nearby and keep trace length below 25 mm to minimize pick-up of motor noise. For harsh industrial environments, add a single-pole RC low-pass filter (10 kOhm + 100 nF) at the ADC input to suppress RF interference above 1.6 kHz.
Although the part is factory temperature compensated, self-heating from the on-chip amplifier can introduce localized offsets during long-term sampling cycles. Estimated: assume 10-20 mW dissipation; ensure airflow or thermal copper pours keep the die below +80C during continuous sampling. In sealed IP-rated enclosures, perform empirical thermal validation across the -40C to +125C spec.
Per the CASE 482A footprint, route pneumatic tubing to the top-mounted port before PCBA to avoid contamination entering the sensing port. Apply conformal coating around the package edges (avoiding the port opening) to protect the leads from moisture in outdoor enclosures. If the assembly will be wave- or reflow-soldered, observe the moisture sensitivity level (MSL) classification and bake per JEDEC J-STD-033 before reflow.
Keep analog ground and digital ground on separate pours, joined at a single point near the MCU ADC ground pin. This star-grounding layout prevents digital switching noise from coupling into the low-impedance sensor output. For battery-powered portable devices, route the analog trace away from boost-converter inductors to avoid magnetic coupling.
Compliance Information
RoHS and AEC-Q100 status not present in the provided verified web data and therefore marked as 'unknown' per Data Authenticity Rules. AEC-Q100 is 'not_applicable' because the standard part is industrial-grade; automotive users should consult NXP for AEC-Q100-graded equivalents. Lead-free is set to 'yes' consistent with the legacy Freescale part numbering convention for surface-mount CASE 482A parts.
