MPXA6115AC6U - 15-115 kPa Absolute Pressure Sensor | NXP
MPN: MPXA6115AC6U ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $16.5 | $16.50 |
| 10 | $14.85 | $148.50 |
| 100 | $12.95 | $1,295.00 |
| 500 | $11.4 | $5,700.00 |
| 1,000 | $9.95 | $9,950.00 |
MPXA6115AC6U Overview
An absolute pressure sensor measures pressure relative to a sealed internal vacuum reference rather than ambient atmosphere, producing a stable output that correlates directly with absolute barometric pressure. The MPXA6115AC6U belongs to the integrated pressure sensor category, sitting within the broader hierarchy of MEMS sensors -> transducers -> sensors -> electronic components. Absolute pressure variants are distinguished from gauge pressure sensors (which reference ambient) and differential pressure sensors (which measure the difference between two ports); this makes absolute types ideal for sealed-system measurements where ambient drift must be excluded.
Key features include ±1.5% maximum accuracy over 0°C to +85°C, on-chip temperature compensation and calibration, ratiometric analog output for ADC interfacing, and a robust MEMS silicon sensing element. The integrated signal chain eliminates the need for external amplification or compensation circuitry, simplifying board design and reducing BOM cost. The single-port top-tube inlet accepts a 0.13" (3.17 mm) tube for pneumatic connection.
The internal architecture combines a piezoresistive MEMS bridge with a precision bipolar op-amp stage and laser-trimmed thin-film resistors. This monolithic integration provides the temperature compensation required to maintain accuracy across the operating range while delivering an amplified output ready for direct ADC sampling. According to NXP datasheet SG626, the device is rated for -40°C to +125°C operation with typical response time of 1.0 ms.
Typical applications include automotive engine manifold absolute pressure (MAP) sensing, barometric pressure altimeters, weather stations, HVAC pressure monitoring, medical respiratory equipment, and industrial process control. The wide 100 kPa operating span and calibrated output make it well suited for altitude tracking in drones and portable navigation devices.
When designing with this sensor, decouple VCC with a 100 nF ceramic capacitor placed within 5 mm of the supply pin and add a 10 µF bulk capacitor on the supply rail to suppress switching noise from upstream regulators. The output is high-impedance during power-up; allow at least 1 ms settling time after VCC reaches 4.75 V before sampling.
This page synthesizes distributor pricing, drop-in alternative cross-references, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for MPXA6115AC6U — 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 MPXA6115AC6U (same form factor and footprint) — differing in Accuracy, Port Style, Supply Voltage, Package, Signal Conditioning.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MPXAZ6115APT1
✅ Drop-In✓ In Stock
$8.95 / Unit
View Datasheet →MPXA6115AC6T1
✅ Drop-In✓ In Stock
$8.65 / Unit
View Datasheet →MPXA6115A6U
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$10.8 / Unit
View Datasheet →KP214N2611XTMA1
✅ Drop-In📋 Reference alternative (not in catalog)
MPXH6115AC6U
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.75 / Unit
View Datasheet →MPXA4115A6U
✅ Drop-In✓ In Stock
$10.5 / Unit
View Datasheet →MPXA6115AC6U Maximum Ratings & Electrical Characteristics
| Pressure Type | Absolute |
| Operating Pressure Range | 15 kPa to 115 kPa (2.18 PSI to 16.68 PSI) |
| Output Voltage Range | 0.2 V to 4.7 V (at 5 V supply) |
| Sensitivity | 45.9 mV/kPa (typical) |
| Supply Voltage | 4.75 V to 5.25 V |
| Accuracy | ±1.5% (0°C to +85°C) |
| Operating Temperature | -40°C to +125°C |
| Response Time | 1.0 ms (typical) |
| Port Style | Single axial top port, 0.13" (3.17 mm) tube |
| Package | 8-SMD, Gull Wing (Case 1320-02, SOP-8) |
| Mounting Type | Surface Mount |
| Output Type | Analog, ratiometric |
| Signal Conditioning | On-chip bipolar op-amp, temperature compensated |
| Element Type | Piezoresistive MEMS silicon |
| RoHS Status | Compliant |
MPXA6115AC6U Pin Configuration
| Pin 1 | VCC — Supply voltage (5 V nominal) |
| Pin 2 | GND — Ground |
| Pin 3 | VOUT — Analog pressure output (0.2 V to 4.7 V) |
| Pin 4 | NC — Not connected (per datasheet) |
| Pin 5 | NC — Not connected (per datasheet) |
| Pin 6 | NC — Not connected (per datasheet) |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | NC — Not connected (per datasheet) |
Typical Applications
MPXA6115AC6U is suitable for 7 applications: Automotive Manifold Absolute Pressure (MAP) Sensing, Barometric Altimeter for Drones and Portable Navigation, Weather Station Barometric Pressure Monitoring, HVAC Duct and Filter Pressure Monitoring, Medical Respiratory and CPAP Pressure Monitoring, Industrial Process Control and Pneumatic Systems, Appliance Water Level and Pump Pressure Sensing.
Automotive Manifold Absolute Pressure (MAP) Sensing
The MPXA6115AC6U delivers the calibrated 0.2 V to 4.7 V absolute pressure output required by engine control units for fuel injection and ignition timing calculations. With 45.9 mV/kPa sensitivity and ±1.5% accuracy over 0°C to +85°C, it provides reliable manifold pressure data across the full 15-115 kPa range encountered at idle, cruise, and wide-open throttle. The top-port tube inlet integrates directly with intake manifold vacuum lines. For under-hood reliability, the operating range extends to +125°C ambient. Source: NXP datasheet SG626.
Recommended
Barometric Altimeter for Drones and Portable Navigation
The MPXA6115AC6U's 15-115 kPa absolute range covers altitudes from sea level up to approximately 9000 m with the 45.9 mV/kPa sensitivity delivering ~4.4 mV per meter of altitude at sea level. Its ±1.5% accuracy and 1.0 ms response time enable sub-meter altitude resolution when paired with a 12-bit ADC. Low power and ratiometric output simplify battery-powered drone and handheld GPS designs. Source: NXP datasheet SG626.
Recommended
Weather Station Barometric Pressure Monitoring
For consumer and professional weather stations, the MPXA6115AC6U measures barometric pressure from 600 to 1050 mbar equivalent (60-105 kPa sub-range) with the accuracy required for weather prediction algorithms. The absolute reference eliminates drift from system altitude changes, and the analog output interfaces directly with microcontrollers via ADC. The SOP-8 surface-mount package enables compact weather sensor PCB designs. Source: NXP datasheet SG626.
Recommended
HVAC Duct and Filter Pressure Monitoring
Building HVAC systems use the MPXA6115AC6U to monitor static pressure across filters, coils, and duct sections, with the 15-115 kPa range covering typical duct pressure differentials. The single top-port design simplifies pneumatic tap installation, and the ratiometric analog output integrates with standard 0-5 V HVAC controller inputs. Operating to +85°C supports plenum-mounted installations. Source: NXP datasheet SG626.
Recommended
Medical Respiratory and CPAP Pressure Monitoring
Medical respiratory equipment such as CPAP machines and ventilators use the MPXA6115AC6U to monitor airway pressure with the accuracy required for therapy delivery. The 45.9 mV/kPa sensitivity and ±1.5% accuracy enable precise pressure control from 15 to 115 kPa, covering typical CPAP pressure ranges of 4-20 cmH2O mapped to the lower portion of the sensor's output span. Source: NXP datasheet SG626.
Recommended
Industrial Process Control and Pneumatic Systems
Factory automation systems use the MPXA6115AC6U to monitor sealed gas pressures in pneumatic actuators, vacuum systems, and process chambers. The absolute reference makes readings independent of atmospheric variation across the factory floor, and the -40°C to +125°C operating range supports unconditioned industrial environments. The on-chip signal conditioning eliminates external amplification, reducing PCB complexity. Source: NXP datasheet SG626.
Recommended
Appliance Water Level and Pump Pressure Sensing
White goods such as washing machines and dishwashers use the MPXA6115AC6U to detect water level via pressure transducer tubes connected to the sump. The 15-115 kPa range covers typical domestic water column pressures, and the analog output integrates directly with appliance control MCUs. The robust SOP-8 package withstands vibration and humidity typical of appliance environments. Source: NXP datasheet SG626.
Recommended
Recommended Products Summary
Engineering reference data for MPXA6115AC6U — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MPXAZ6115APT1 | MPXA6115AC6T1 | KP214N2611XTMA1 | MPXA4115A6U |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Infineon | NXP Semiconductors |
| Package | 8-SOP (Case 1320-02) | 8-SOP - same | 8-SOP - same | 8-DSOF - same pin count | 8-SOP - same |
| Pressure Range | 15-115 kPa | 15-115 kPa | 15-115 kPa | 15-115 kPa | 15-150 kPa |
| Output Voltage | 0.2 V to 4.7 V | 0.2 V to 4.7 V | 0.2 V to 4.7 V | 0.1 V to 4.85 V | 0.2 V to 4.8 V |
| Supply Voltage | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 5 V nominal | 4.75 V to 5.25 V |
| Automotive Grade | No | Yes (AEC-Q100) | No | Yes (AEC-Q100) | No |
| 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 |
Key Differentiators
- Integrated signal conditioning eliminates external op-amps (vs Raw MEMS sensors (e.g. bare piezoresistive bridges))
- Wide operating temperature range up to +125°C (vs MPX4115A series (rated to +85°C only))
- Direct NXP-to-NXP drop-in upgrade path with AEC-Q100 (vs MPXAZ6115APT1 (same package, automotive grade))
Design Notes
Decouple the VCC pin with a 100 nF ceramic capacitor placed within 5 mm of the package and add a 10 µF bulk capacitor on the supply rail. The MPXA6115AC6U is sensitive to high-frequency noise on the 5 V supply, which couples into the analog output and degrades ADC resolution. Use a low-noise LDO (such as NXP's TLV70033 or equivalent) rather than a switching regulator for the sensor supply when measuring low-pressure differentials below 5 kPa.
Place the sensor away from PCB regions with high thermal gradients such as near power devices orifices orifices. The MEMS die is temperature-sensitive and the on-chip compensation is calibrated assuming uniform thermal exposure. Keep the top-port tube inlet vertical to avoid condensate accumulation in the pressure cavity for humid environment applications like medical respiratory equipment.
Route the analog VOUT trace away from digital switching lines, clock generators, and PWM signals to avoid coupling noise. Add an RC low-pass filter (10 kΩ + 100 nF, fc ≈ 160 Hz) at the ADC input if high-frequency noise is present; the MPXA6115AC6U's 1.0 ms response time supports filtering below 1 kHz without dynamic measurement degradation. Source: NXP datasheet SG626.
Do not apply pressure beyond 200 kPa or vacuum beyond 0 kPa to the top port - the MEMS diaphragm will permanently deform. Apply power with monotonic ramp; voltage transients below 4.75 V can cause the output to enter undefined states. Avoid ESD exposure; the device is rated at HBM 2 kV per NXP datasheet SG626. Use a tube clamp to secure the pneumatic connection and prevent mechanical stress on the package.
Compliance Information
Standard MPXA6115AC6U is not AEC-Q100 qualified; choose MPXAZ6115APT1 variant for automotive applications. RoHS compliant per NXP product page. Halogen-free per NXP environmental certification.
