MPXA6115A6T1 - 15-115 kPa Absolute Pressure Sensor | STMicroelectronics
MPN: MPXA6115A6T1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.62 | $166.20 |
| 100 | $14.78 | $1,478.00 |
| 500 | $13.34 | $6,670.00 |
| 1,000 | $12.05 | $12,050.00 |
MPXA6115A6T1 Overview
An absolute pressure sensor is a MEMS (Micro-Electro-Mechanical Systems) device that measures pressure referenced to a sealed vacuum cavity inside the die, rather than to ambient atmospheric pressure. It belongs to the broader hierarchy of pressure transducers -> pressure sensors -> MEMS sensors -> sensors. By integrating signal conditioning, temperature compensation, and a calibrated thin-film resistor network on the same silicon die, the MPXA6115A6T1 delivers a high-level analog output that can be read directly by an MCU ADC without external amplification, simplifying both PCB layout and firmware development.
Key features include ±1.5% full-scale accuracy over 0 °C to 85 °C, on-chip bipolar op-amp signal conditioning, temperature compensation from -40 °C to +125 °C, and a ratiometric output proportional to supply voltage. The 8-SMD gull-wing package (commonly referred to as SOP-8 surface-mount) accepts standard reflow soldering and supports automated assembly, while the PPS (polyphenylene sulfide) housing provides chemical resistance suitable for automotive under-hood environments.
The MPXA6115A6T1 uses a piezoresistive Wheatstone-bridge transducer whose differential output is amplified and offset by an on-chip bipolar op-amp stage. This monolithic integration eliminates parasitic thermocouple errors caused by long interconnects between a bare die and a separate amplifier, and yields a transfer function of VOUT = VSUPPLY × (0.018 × P + 0.84) approximately, allowing designers to compute pressure directly from the ADC reading.
Typical applications include manifold absolute pressure (MAP) sensing in engine control units, barometric pressure measurement in HVAC and weather stations, altitude estimation in drones and portable navigation devices, and process monitoring in industrial pneumatic systems. The wide supply tolerance (4.75 V to 5.25 V) makes it compatible with regulated 5 V rails.
When designing with this part, decouple VCC with a 100 nF ceramic capacitor placed within 5 mm of the supply pin. The output is ratiometric, so ADC measurements must use the same 5 V reference used to power the sensor to preserve accuracy across supply variation.
This page synthesizes distributor pricing, drop-in alternatives, application-fit guidance, and practical design notes not aggregated in the manufacturer datasheet alone.
Drop-in alternatives for MPXA6115A6T1 — 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 MPXA6115A6T1 (same form factor and footprint) — differing in Accuracy, Package, Operating Temperature, Port Style, Signal Conditioning.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MPXA6115A6U
✅ Drop-In✓ In Stock
$10.8 / Unit
View Datasheet →MPXA6115AC6U
✅ Drop-In✓ In Stock
$9.95 / Unit
View Datasheet →MPXA6115A6T1G
✅ Drop-In📋 Reference alternative (not in catalog)
MPXAZ6115AC6T1
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →MPX5100A
✅ Drop-In✓ In Stock
$9.95 / Unit
View Datasheet →MPXA4250A
✅ Drop-In📋 Reference alternative (not in catalog)
MPXA6115A6T1 Maximum Ratings & Electrical Characteristics
| Pressure Type | Absolute |
| Operating Pressure Range | 2.18 PSI to 16.68 PSI (15 kPa to 115 kPa) |
| Output Type | Analog Voltage |
| Output Voltage | 0.2 V to 4.7 V (at 5 V supply) |
| Supply Voltage | 4.75 V to 5.25 V |
| Accuracy | ±1.5% FS |
| Port Style | Single horizontal port (axial) |
| Package | 8-SMD Gull Wing (SOP 8-surface-mount module) |
| Mounting Type | Surface Mount |
| Termination Style | PCB / Gull Wing |
| Operating Temperature | -40 °C to +125 °C |
| Signal Conditioning | On-chip bipolar op-amp + thin-film resistor network |
| Temperature Compensation | On-chip, calibrated |
| RoHS Status | Compliant (per distributor listings) |
| Output Function | Ratiometric to supply voltage |
MPXA6115A6T1 Pin Configuration
| Pin 1 | VCC — Positive supply voltage (4.75 V to 5.25 V) |
| Pin 2 | GND — Ground |
| Pin 3 | VOUT — Analog output voltage, 0.2 V to 4.7 V ratiometric |
| Pin 4 | NC — Not connected |
| Pin 5 | NC — Not connected |
| Pin 6 | NC — Not connected |
| Pin 7 | NC — Not connected |
| Pin 8 | NC — Not connected |
Typical Applications
MPXA6115A6T1 is suitable for 7 applications: Engine Manifold Absolute Pressure (MAP) Sensing, Barometric Pressure and Weather Stations, Drone and UAV Altitude Estimation, Industrial Pneumatic System Monitoring, HVAC Blower and Duct Pressure Measurement, Portable Medical and Altimeter Devices, Digital Altimeter and Dive-Watch Reference Design.
Engine Manifold Absolute Pressure (MAP) Sensing
The MPXA6115A6T1's 15-115 kPa range centers directly on naturally aspirated gasoline engine manifold pressures (typically 20-100 kPa under load and idle), making the sensor ideal for MAP sensing in engine control units. With ±1.5% full-scale accuracy and ratiometric analog output, the device delivers reliable readings that translate to precise air-mass calculation for fuel injection. Placing it on the intake manifold with a vacuum hose to the port, the output swings 0.2-4.7 V proportional to absolute pressure; this matches 5 V MCU ADC inputs without amplification. On-chip temperature compensation from -40 °C to +125 °C supports under-hood automotive thermal exposure without software correction. Compared to a discrete piezoresistive bridge the MPXA6115A6T1 eliminates external op-amps, reducing BOM count and PCB area.
Recommended
Barometric Pressure and Weather Stations
Weather stations and personal weather meters rely on accurate absolute pressure measurement around the 100 kPa atmospheric baseline. The MPXA6115A6T1 spans 15-115 kPa, dedicating most of its dynamic range to the barometric ±10 kPa envelope of interest, which maximizes ADC resolution per kilopascal and improves short-term weather-change detection. Its ±1.5% accuracy enables altitude-grade barometric readings when paired with an MCU that converts pressure to altitude via the barometric formula. The on-chip signal conditioning removes the need for a separate instrumentation amplifier in the meter, reducing board space and cost. In a typical weather station, the sensor mounts on the enclosure exterior with the port exposed to ambient air; the ratiometric output must be referenced to the same 5 V supply feeding the MCU ADC.
Recommended
Drone and UAV Altitude Estimation
The MPXA6115A6T1 supports altitude estimation in hobby and industrial drones where barometric pressure serves as the primary altitude reference below GPS resolution gaps. The 15-115 kPa range covers sea-level air pressure down to roughly 500 m altitude, with on-chip temperature compensation ensuring stable readings as the drone climbs and ambient temperature drops. The ratiometric 0.2-4.7 V output connects directly to a 5 V-tolerant ADC on common drone flight controllers, eliminating analog front-end components. Engineers commonly fuse this sensor's barometric data with IMU readings for vertical-position hold; the on-chip temperature compensation reduces warm-up drift critical during takeoff transient. The SOP-8 gull-wing package withstands vibration typical of multirotor airframes.
Recommended
Industrial Pneumatic System Monitoring
In factory pneumatic systems that operate below 8 bar (about 800 kPa), the MPXA6115A6T1 covers common low-pressure compressed-air regulation and leak-detection tasks. Although its 115 kPa upper limit is unsuitable for high-pressure plant air, the sensor is a strong fit for vacuum-pickup verification, low-pressure differential measurement, and process-gas inlet monitoring. The ±1.5% accuracy is adequate for trend logging and alarm-trip decisions in PLC-based control. Placing the sensor between the regulator and actuator, the 0.2-4.7 V analog output feeds directly into a 4-20 mA transmitter or a process controller analog input; the on-chip compensation handles the -40 °C to +125 °C typical industrial enclosure environment. Compared to bare-bridge sensors the integrated amplifier simplifies the certification path for industrial control panels.
Recommended
HVAC Blower and Duct Pressure Measurement
Commercial HVAC systems use duct pressure to confirm filter loading, blower performance, and zone damper position. The MPXA6115A6T1's 15-115 kPa range comfortably covers the typical 0-3 kPa duct static pressure commonly scaled at the controller; using the lower portion of the output swing provides high resolution for filter-load detection. The on-chip temperature compensation handles the -40 °C to +125 °C plenum environment without external linearization. In a typical installation, a sensing tube extends from the duct to the sensor port on the control board, and the ratiometric output is read by a 12-bit ADC. The 5 V single-supply operation matches HVAC controller rails, simplifying power design relative to dual-supply instrumentation solutions.
Recommended
Portable Medical and Altimeter Devices
Handheld medical devices such as spirometers and altitude-estimating wearables occasionally use absolute pressure sensors for flow or altitude. The MPXA6115A6T1's small SMD form factor fits medical enclosures while the ratiometric 0.2-4.7 V output integrates with low-power 5 V MCUs. The on-chip temperature compensation reduces drift across body-temperature and ambient transitions. Designers targeting handheld medical applications benefit from the integrated amplifier (smaller BOM) and from sourcing a single component rated for the full medical operating-temperature range; verify IEC 60601 compliance independently. Compared to bare pressure sensors, this part reduces analog-design iteration time and helps first-pass designs pass EMI and temperature tests on the production line.
Recommended
Digital Altimeter and Dive-Watch Reference Design
Although this part is not pressure-rated for deep diving, it serves as a cost-effective barometric altimeter reference for outdoor watches and dive computers in shallow-water modes. The 15-115 kPa range provides high resolution in the barometric envelope, supporting altitude readings within ±1 m accuracy when properly calibrated. On-chip temperature compensation preserves accuracy across the body-worn -10 °C to +50 °C range typical of consumer watches. In a typical wearable, the SOP-8 module's single port exposes to ambient air through a Gore-Tex vent, and the ratiometric output feeds a low-power MCU ADC; the entire sub-system draws under 5 mA total, extending battery life versus discrete-bridge sensors.
Recommended
Recommended Products Summary
Engineering reference data for MPXA6115A6T1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MPXA6115A6U | MPXA6115AC6U | MPXAZ6115AC6T1 | MPX5100A | MPXA4250A |
|---|---|---|---|---|---|---|
| Package | 8-SMD Gull Wing (SOP-8 SMD) | 8-SMD Gull Wing (same) | 8-SMD Gull Wing (same) | 8-SMD Gull Wing (same, axial port) | 8-SMD Gull Wing (same footprint) | 8-SMD Gull Wing (same footprint) |
| Brand | STMicroelectronics | STMicroelectronics (same) | STMicroelectronics (same) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Pressure Type | Absolute | Absolute (same) | Absolute (same) | Absolute (same) | Absolute (same) | Absolute (same) |
| Operating Pressure Range | 15-115 kPa (2.18-16.68 PSI) | 15-115 kPa (same) | 15-115 kPa (same) | 15-115 kPa (same) | 20-250 kPa (+117% upper) | 20-250 kPa (+117% upper) |
| Output Voltage | 0.2 V to 4.7 V | 0.2 V to 4.7 V (same) | 0.2 V to 4.7 V (same) | 0.2 V to 4.7 V (same) | 0.2 V to 4.7 V (same) | 0.2 V to 4.6 V (-2% upper) |
| Supply Voltage | 4.75 V to 5.25 V | 4.75 V to 5.25 V (same) | 4.75 V to 5.25 V (same) | 4.75 V to 5.25 V (same) | 4.75 V to 5.25 V (same) | 4.75 V to 5.25 V (same) |
| Accuracy | ±1.5% FS | ±1.5% FS (same) | ±1.5% FS (same) | ±1.5% FS (same) | ±2.5% FS (worse) | ±1.5% FS (same) |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C (same) | -40 °C to +125 °C (same) | -40 °C to +125 °C (same) | -40 °C to +125 °C (same) | -40 °C to +125 °C (same) |
| On-chip Signal Conditioning | Yes (bipolar op-amp + thin-film network) | Yes (same) | Yes (same) | Yes (same) | Yes (same) | Yes (same) |
Key Differentiators
- Optimal 15-115 kPa range centered on barometric/automotive MAP envelope (vs MPX5100A)
- Tighter ±1.5% accuracy (vs MPX5100A)
- Higher resolution at the barometric operating point (vs MPXA4250A)
Design Notes
Estimated: the MPXA6115A6T1 draws approximately 5 mA nominal from a 5 V supply per the datasheet's Typical Operating Characteristics. Place a 100 nF ceramic decoupling capacitor within 5 mm of the VCC pin to suppress supply noise; a bulk 10 µF tantalum or aluminum polymer is recommended if VCC is shared with motors or relays. The sensor's output is ratiometric, so a noisy or unregulated 5 V rail directly degrades ADC accuracy - use a low-noise LDO such as the LP2985 or TPS7A45 to power both the sensor and the ADC reference.
Because the MPXA6115A6T1 output is ratiometric, ADC conversions MUST use the same 5 V rail (or a buffered version of it) as the reference voltage; otherwise accuracy and gain tracking degrade. Estimated: at 1 ADC LSB per ~1.15 mV (12-bit over 4.7 V), a 50 mV supply drift causes ~43 LSB error. Always characterize the system with the actual regulator enabled, and re-calibrate if supply tolerance exceeds ±1%.
Mount the sensor on the PCB so the port is exposed to the ambient pressure source and the body of the sensor is not directly under high-power dissipating components. Estimated: self-heating during continuous 5 mA operation raises the die temperature less than 5 °C above ambient, but placing the sensor near a 1 W switching converter can introduce 20-30 °C ambient rise and shift pressure readings via package stress. Provide copper clearance around the port and use thermal vias to spread heat from nearby devices.
Compliance Information
RoHS and lead-free compliance per DigiKey/Mouser product listings. AEC-Q100 qualification not listed in distributor data - verify for safety-critical automotive designs directly with STMicroelectronics.
