MPXH6115A6U - 15-115 kPa Absolute Pressure Sensor, SOIC-8 | NXP
MPN: MPXH6115A6U ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $19.73 | $19.73 |
| 10 | $17.5 | $175.00 |
| 100 | $14.2 | $1,420.00 |
| 500 | $11.85 | $5,925.00 |
| 1,000 | $9.95 | $9,950.00 |
MPXH6115A6U Overview
An absolute pressure sensor is a transducer that produces an output proportional to pressure referenced to a sealed vacuum cavity rather than ambient air. The MPXH6115A6U sits inside the broader sensor taxonomy as a piezoresistive silicon sensor -> MEMS pressure sensor -> absolute pressure transducer. Because the vacuum reference is built in, the device outputs a pressure reading that includes the local atmospheric component, which is ideal for sealed-cavity applications where atmospheric drift must be inherently rejected.
Key features include a maximum pressure rating of 400 kPa (over-pressure survival to roughly 3.5x the full-scale operating range), ratiometric analog output that tracks VCC for ADC-friendly interfaces, and a typical current consumption of 6 mA. The SOIC-8 package with a top-side pressure port enables standard surface-mount reflow while preserving access for hose attachment, and NXP/Freescale screening to AEC-Q100-style flow supports automotive under-hood deployments.
From a silicon-design standpoint, the MPXH6115A6U combines a single-chip piezoresistive Wheatstone bridge, an on-die bipolar op-amp gain stage, and laser-trimmed compensation networks. The result is a calibrated, amplified, temperature-corrected analog rail that requires no external signal conditioning beyond bypass capacitance and a simple RC anti-aliasing filter ahead of the host ADC.
Typical uses include automotive manifold absolute pressure (MAP) sensing, HVAC altitude compensation, weather-station barometric instruments, and medical respiratory equipment. Industrial applications include sealed-system leak detection, altitude reporting for drones, and process-control back-pressure monitoring where the 15-115 kPa window closely matches sea-level ambient.
When designing with this part, place the 0.2-4.7 V output through an RC low-pass filter (typically 1 kohm/100 nF, fc ~ 1.6 kHz) before the ADC to suppress high-frequency noise from the supply pump. Use an ADC reference tied to VCC if ratiometric cancellation of supply variation is desired, since the output nominally scales with VCC.
Drop-in alternatives for MPXH6115A6U — 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 MPXH6115A6U (same form factor and footprint) — differing in Package, Accuracy, Port Style, Output Type, Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MPXH6115AC6U
✅ Drop-In✓ In Stock
$5.75 / Unit
View Datasheet →MPXH6115A6T1
✅ Drop-In✓ In Stock
$6.45 / Unit
View Datasheet →MPXA6115A
✅ Drop-In📋 Reference alternative (not in catalog)
MPXHZ6115AC6U
✅ Drop-In✓ In Stock
$7.25 / Unit
View Datasheet →MPXHZ6115A6T1
✅ Drop-In✓ In Stock
$10.85 / Unit
View Datasheet →MPXH6115A6U Maximum Ratings & Electrical Characteristics
| Pressure Type | Absolute |
| Operating Pressure Range | 15 kPa to 115 kPa (2.18 PSI to 16.68 PSI) |
| Maximum Over-Pressure | 400 kPa |
| Sensitivity | 45.9 mV/kPa (typical) |
| Accuracy (0C to 85C) | 1.5 % (max) |
| Output Voltage Range | 0.2 V to 4.7 V |
| Supply Voltage | 4.75 V to 5.25 V |
| Supply Current | 6 mA (typical) |
| Operating Temperature | -40C to +125C |
| Compensated Temperature | 0C to +85C |
| Output Type | Analog, ratiometric to VCC |
| Package | 8-SOIC (0.295", 7.50 mm width) with top-side pressure port |
| Mounting Type | Surface Mount |
| Pressure Port | Vertical/Horizontal axial port (case variant 6) |
| Media Compatibility | Dry air, non-corrosive gases only |
MPXH6115A6U Pin Configuration
| Pin 1 | VCC — Supply voltage (4.75 V to 5.25 V) |
| Pin 2 | GND — Ground |
| Pin 3 | VOUT — Analog 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
MPXH6115A6U is suitable for 6 applications: Automotive MAP Sensing, HVAC Barometric Altitude Compensation, Weather Station / Barometer Module, Medical Respiratory Equipment, Industrial Process Back-Pressure Monitoring, Drone Altitude Reporting.
Automotive MAP Sensing
The MPXH6115A6U's 15-115 kPa absolute-pressure window covers the full intake-manifold range from deep vacuum to atmospheric and slightly above, while the ratiometric 0.2-4.7 V output ties directly to engine ECU ADCs via a single wire. Plumbed into the manifold vacuum port, it replaces legacy MAP sensors with no host-side ratiometric calibration required; AEC-style screening supports under-hood thermal operation to +125C. The 1.5 % accuracy across 0-85C provides sufficient precision for closed-loop fuel control around stoichiometric mixtures.
Recommended
HVAC Barometric Altitude Compensation
Building HVAC systems use the MPXH6115A6U to measure outdoor air pressure before mass-flow CFM conversion, where absolute pressure drives the air-density correction factor in the controller algorithm. The 0.2-4.7 V output spans the 75-110 kPa barometric range encountered from sea level to 2500 m altitude, and the on-chip temperature compensation removes the seasonal drift that would otherwise corrupt the comfort setpoint. An RC anti-alias filter ahead of the controller ADC suppresses pump and fan noise.
Recommended
Weather Station / Barometer Module
Hobbyist and prosumer weather stations use the MPXH6115A6U as the primary barometric element because the 0.2-4.7 V output maps cleanly to a 10-bit ADC channel and the 15-115 kPa window encompasses all surface-pressure variations including hurricanes and high-pressure ridges. The on-chip temperature compensation removes the dominant error term in unheated outdoor enclosures, and the SOIC-8 package is small enough for handheld field instruments. Power consumption is dominated by the host MCU rather than the 6 mA sensor bias.
Recommended
Medical Respiratory Equipment
In CPAP, BiPAP, and ventilator circuits, the MPXH6115A6U monitors proximal airway pressure, where the 15-115 kPa window covers normal breathing pressure through slightly elevated therapeutic pressure. The 0.2-4.7 V output drives a differential amplifier with a patient-safety isolation barrier before the host MCU; the 1.5 % accuracy across 0-85C supports clinical pressure-target tracking. The dry-gas media requirement is satisfied by the sealed, filtered air path typical of respiratory tubing.
Recommended
Industrial Process Back-Pressure Monitoring
Process-control panels use the MPXH6115A6U to measure vacuum or low-pressure back-pressure on sealed tanks and vacuum lines where the 15-115 kPa window aligns with the standard industrial vacuum range. The ratiometric output tracks the host PLC's 5 V rail directly, eliminating ground-loop-induced measurement drift across long cable runs. The 400 kPa over-pressure rating protects the sensor from hydraulic-shock events during maintenance and pump start-up.
Recommended
Drone Altitude Reporting
Multirotor flight controllers use the MPXH6115A6U as the primary barometric altitude source; the 15-115 kPa window resolves altitude changes of 0.1 m with appropriate filtering, and the 0.2-4.7 V output drives the analog input of common flight-controller ADCs directly. The on-chip temperature compensation removes the dominant error term when the drone transitions between cold ground and warm flight, and the 6 mA quiescent current fits in even a sub-100 mAh 1S power budget.
Recommended
Recommended Products Summary
Engineering reference data for MPXH6115A6U — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MPXH6115AC6U | MPXH6115A6T1 | MPXA6115A | MPXHZ6115AC6U |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | SOIC-8 (7.50 mm width) | SOIC-8 (7.50 mm width) - same | SOIC-8 (7.50 mm width) - same | SOIC-8 (7.50 mm width) - same | SOIC-8 (7.50 mm width) - same |
| Pressure Type | Absolute (15-115 kPa) | Absolute (15-115 kPa) | Absolute (15-115 kPa) | Absolute (15-115 kPa) | Absolute (15-115 kPa) |
| Supply Voltage | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V |
| Output Voltage Range | 0.2 V to 4.7 V | 0.2 V to 4.7 V | 0.2 V to 4.7 V | 0.2 V to 4.7 V | 0.2 V to 4.7 V |
| Sensitivity | 45.9 mV/kPa | 45.9 mV/kPa | 45.9 mV/kPa | 45.9 mV/kPa | 45.9 mV/kPa |
| Accuracy (0-85C) | 1.5 %VFSS (max) | 1.5 %VFSS (max) | 1.5 %VFSS (max) | 1.5 %VFSS (max) | 1.5 %VFSS (max) |
| Pressure Port Orientation | Horizontal axial (case 6 / H) | Vertical axial (case C) | Horizontal axial (case T1) | Case A (port style differs) | Case C with Z-grade marking |
Key Differentiators
- Drop-in identical spec table across multiple case/port variants (vs MPXH6115AC6U)
- Same silicon die available in tape-and-reel for SMT pick-and-place (vs MPXH6115A6T1)
- A-grade (absolute) versus Z-grade (commercial) screening within the family (vs MPXHZ6115AC6U)
Design Notes
Place a 100 nF ceramic bypass capacitor as close as possible to the VCC pin (pin 1) and a separate 100 nF-1 uF ceramic on the VOUT pin (pin 3) to shunt high-frequency supply and reference noise. Route the analog output trace away from switching converter inductors and digital clock lines; a 4-6 mil trace on a quiet inner layer with guard ground reduces coupled noise. The pressure port on top of the SOIC-8 case requires no PCB cut-out for through-hole air access if the case variant 6H port is used.
Add a single-pole RC low-pass filter (R = 1 kohm, C = 100 nF, fc approximately 1.6 kHz) between the VOUT pin and the host ADC input to suppress wideband op-amp noise without compromising the under-1 kHz signal content. If higher bandwidth is needed (e.g., for transient pressure events), reduce R to 100 ohm and adjust C accordingly. Tie the ADC reference rail to VCC so the ratiometric cancellation absorbs supply drift end-to-end.
Do not expose the pressure port to liquids or corrosive gases - the on-chip bond wires and piezoresistive bridge tolerate only dry air per the datasheet. The media compatibility restriction means a hydrophobic membrane or particulate filter is mandatory in humid or dirty environments. Power-on transients should be limited to within the 4.75-5.25 V supply window; reverse-polarity protection via a Schottky diode on VCC is recommended for hot-plugged field-service scenarios.
Estimated: at 5 V supply and 6 mA quiescent current, the SOIC-8 package dissipates approximately 30 mW internally, which is well below the package's thermal resistance budget and produces a junction-temperature rise of less than 1C. However, sustained operation at +125C derates the silicon long-term reliability per typical automotive-grade screening; verify the actual AEC-Q100 conformance of the specific MPXH6115A6U order code before deployment in safety-critical underhood locations.
Compliance Information
RoHS, REACH, AEC-Q100, lead-free and halogen-free status not provided in verified web data; downstream users should consult the manufacturer product page or NXP environmental compliance documentation before design-in.
