MPXA4115AC6U - 15-115 kPa Absolute Pressure Sensor | NXP
N.º de pieza: MPXA4115AC6U ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $18.5 | $18,50 |
| 10 | $16.4 | $164,00 |
| 100 | $14.2 | $1.420,00 |
| 500 | $12.8 | $6.400,00 |
| 1.000 | $11.5 | $11.500,00 |
MPXA4115AC6U Descripción general
An absolute pressure sensor is a piezoresistive transducer that produces a calibrated analog output proportional to pressure referenced to a sealed internal vacuum cavity, distinguishing it from gage (vented) and differential variants. Pressure sensors occupy the broader sensor hierarchy: pressure transducer -> silicon piezoresistive sensor -> signal-conditioned sensor IC -> sensor module, and are widely used in automotive engine control, weather stations, and HVAC systems where barometric correction or altitude reporting is required.
Key features of the MPXA4115AC6U include integrated media-resistant gel protection on the top port, single 5 V supply operation with low current draw, factory calibration eliminating external compensation components, and ratiometric analog output. The 8-SMD top-port package accepts a 3.17 mm tube interface, simplifying integration with intake manifolds and sealed enclosures. Built-in temperature compensation across -40C to +125C maintains specified accuracy without host-side linearization.
Architecturally, the MPXA4115AC6U combines a diffused silicon piezoresistive bridge with a sealed vacuum reference, a low-noise bipolar instrumentation front-end, and a precision-trimmed output stage. The on-chip laser trim calibrates offset, span, and temperature coefficients during manufacture, ensuring part-to-part consistency within ±1.5% over the full operating range. The exposed-port (axial tube) variant supports direct manifold mounting without additional sealing hardware.
Typical applications include automotive manifold absolute pressure (MAP) sensing for fuel-injection and engine management, altimeters and barometers for portable instruments, HVAC pressure monitoring, weather data acquisition, and industrial pneumatic control. Designers also use the MPXA4115AC6U in motorcycle and small-engine ECUs where its 0.2 V to 4.8 V swing maps cleanly to ADC input ranges.
For best accuracy, drive the sensor from a regulated 5.0 V supply and apply a low-pass RC filter (typically 10 kohm/0.01 uF) at the analog output to suppress wideband noise before the ADC. Because the output is ratiometric to VCC, use the same 5 V reference for the host ADC to cancel VCC drift. Avoid exposing the gel-protected top port to abrasive media without external filtering.
This page consolidates distributor pricing as of 2026-10-15, NXP/Freescale same-family drop-in alternatives, and practical design guidance beyond the manufacturer datasheet summary.
Alternativas directas para MPXA4115AC6U — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con MPXA4115AC6U (mismo factor de forma y huella) — difiere en Output Type, Sensitivity, Supply Voltage, Accuracy, Media Resistant.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MPXAZ4115A6U
✅ Sustitución directa✓ En stock
$7.1 / unidad
Ver hoja de datos →MPXA4115A6T1
✅ Sustitución directa✓ En stock
$6.65 / unidad
Ver hoja de datos →MPXA4115A6U
✅ Sustitución directa✓ En stock
$10.5 / unidad
Ver hoja de datos →MPXA4115AC6U Valores máximos y características eléctricas
| Pressure Type | Absolute |
| Pressure Range | 15 kPa to 115 kPa (2.18 PSI to 16.68 PSI) |
| Tipo de salida | Analog Voltage |
| Rango de tensión de salida | 0.2 V to 4.8 V |
| Tensión de alimentación | 4.85 V to 5.35 V (nominal 5.0 V) |
| Sensitivity | 45.9 mV/kPa (nominal) |
| Rango de temperatura de funcionamiento | -40C to +125C |
| Port Style | Top axial port, male tube -0.13 inch (3.17 mm) |
| Encapsulado | 8-SMD, Gull Wing (Case 482A-01) |
| Tipo de montaje | Surface Mount |
| Built-in Compensation | Temperature compensated and calibrated |
| Signal Conditioning | On-chip, integrated |
| Estado RoHS | Compliant |
Configuración de pines de MPXA4115AC6U
| Pin 1 | VCC — Supply voltage (4.85 V to 5.35 V) |
| Pin 2 | GND — Ground |
| Pin 3 | Vout — Analog pressure output (0.2 V to 4.8 V ratiometric) |
| 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) |
Aplicaciones típicas
MPXA4115AC6U es adecuado para 7 aplicacións: Automotive Manifold Absolute Pressure (MAP) Sensing, Altimeter and Barometer Instruments, HVAC and Building Pressure Monitoring, Weather Station Data Acquisition, Industrial Pneumatic Pressure Control, Small-Engine ECU and Motorcycle Engine Management, Drone and UAV Altitude Hold.
Automotive Manifold Absolute Pressure (MAP) Sensing
The MPXA4115AC6U is purpose-built for automotive MAP sensing because its 15 kPa to 115 kPa absolute range matches the full vacuum-to-atmosphere pressure variation in an engine intake manifold. Its 0.2 V to 4.8 V ratiometric output maps directly onto a 5 V ADC input range commonly used in engine ECUs; the on-chip temperature compensation from -40C to +125C maintains specified accuracy across under-hood conditions without host-side correction. Place the sensor on the manifold with its media-resistant top port facing the pressure source, and add a 10 kohm/0.01 uF low-pass filter at the output to suppress wideband noise before sampling. Unlike bare piezoresistive bridges, the MPXA4115AC6U's on-chip signal conditioning eliminates the need for an external instrumentation front-end.
Recomendado
Altimeter and Barometer Instruments
The MPXA4115AC6U's 15 kPa to 115 kPa range corresponds to altitudes from -500 m to +9000 m, making it suitable for handheld altimeters, weather stations, and drone telemetry. Its 45.9 mV/kPa sensitivity yields a usable resolution of about 0.05 m after ADC quantization, while the 0.2 V to 4.8 V analog swing simplifies interface with low-cost 10-bit MCUs. Designers pair the MPXA4115AC6U with a low-noise LDO such as the TPS7A4701 to power the analog supply and reference the host ADC; the ratiometric output then cancels LDO drift automatically. Add a 100 nF ceramic bypass at VCC and route the analog output away from switching nodes.
Recomendado
HVAC and Building Pressure Monitoring
For HVAC duct and cleanroom pressure monitoring, the MPXA4115AC6U offers the absolute-pressure reference needed to track small (sub-100 Pa) deviations in duct static pressure superimposed on atmospheric variation. The 15 kPa lower bound stays comfortably below sea-level barometric pressure, and the on-chip temperature compensation removes drift across -40C to +125C heating-cooling thermal cycles. A typical implementation injects a 4.85 V to 5.35 V regulated supply and samples the 0.2 V to 4.8 V output at 100 Hz; a digital averaging filter reduces fan-induced pneumatic noise. The factory calibration eliminates per-board trim.
Recomendado
Weather Station Data Acquisition
In amateur and professional weather stations, the MPXA4115AC6U is used as a barometric pressure cell because its 115 kPa upper bound covers sea-level plus typical high-pressure system excursions. With 45.9 mV/kPa sensitivity, the sensor resolves about 0.05 kPa when paired with a 12-bit ADC, well within the 0.1 kPa precision needed for synoptic pressure charts. The -40C to +125C operating range handles outdoor enclosure extremes; a waterproof breather vent on the housing keeps the absolute-pressure interpretation valid. Compare against an MPL3115A2 I2C variant for designs preferring digital output.
Recomendado
Industrial Pneumatic Pressure Control
Factory automation panels use the MPXA4115AC6U to measure compressed-air line and vacuum pickup pressures because of its 115 kPa upper limit and media-resistant port. The 0.2 V to 4.8 V analog output drives a 4-20 mA industrial transmitter front-end or connects directly to a PLC analog input. The 5.0 V supply and low current draw fit DIN-rail-mounted 24 V-to-5 V converters comfortably. For higher-range industrial applications (up to 1 MPa) consider the MPX4250AC6U which shares the Case 482A-01 footprint but extends the upper limit to 250 kPa.
Recomendado
Small-Engine ECU and Motorcycle Engine Management
In motorcycle and small-engine electronic control units, the MPXA4115AC6U provides the MAP signal needed for fuel-injection pulse-width calculation. Its compact 8-SMD Case 482A-01 footprint suits tight engine bay placements and its 0.2 V to 4.8 V output spans cleanly from full vacuum (idle) to wide-open throttle. The -40C to +125C operating range tolerates under-seat temperatures in sun-baked conditions. Pair with a low-side MOSFET driver (MC33810) and 5 V LDO to complete a compact motorcycle ECU sub-system.
Recomendado
Drone and UAV Altitude Hold
Open-loop altitude hold in hobby drones and UAV telemetry benefits from the MPXA4115AC6U's absolute-pressure reference: with 45.9 mV/kPa sensitivity and 0.2 V to 4.8 V swing, the ADC quantizes about 0.05 kPa (5 m altitude equivalent) per LSB at 10 bits. Housed in a Case 482A-01 8-SMD, the part fits alongside the flight controller on a small ESC stack. For digital I2C/SPI interfaces used in modern FCs, consider the MPL3115A2; the MPXA4115AC6U is preferred when an analog front-end is already present.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MPXA4115AC6U — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MPXAZ4115A6U | MPXA4115A6T1 | MPXA4115A6U |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | Case 482A-01 8-SMD gull-wing | SOP-8 axial tube | Case 482A-01 8-SMD | Case 482A-01 8-SMD |
| Pressure Range | 15 to 115 kPa (2.18 to 16.68 PSI) | 15 to 115 kPa | 15 to 155 kPa | 15 to 115 kPa |
| Output Voltage Range | 0.2 V to 4.8 V | 0.2 V to 4.8 V | 0.2 V to 4.8 V | 0.2 V to 4.8 V |
| Supply Voltage | 4.85 V to 5.35 V | 4.85 V to 5.35 V | 4.85 V to 5.35 V | 4.85 V to 5.35 V |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
| On-Chip Compensation | Yes (temperature compensated and calibrated) | Yes | Yes | Yes |
Diferenciadores clave
- SMD Case 482A-01 with top axial port (frente a MPXAZ4115A6U)
- 15-115 kPa pressure range optimized for MAP/barometer (frente a MPXA4115A6T1)
- On-chip temperature compensation and calibration (frente a Generic piezoresistive bare bridges)
Notas de diseño
Power the MPXA4115AC6U from a regulated 5.0 V supply with a 0.1 uF ceramic bypass capacitor placed within 5 mm of the VCC pin. Use a low-noise LDO such as the TPS7A4701 because the MPXA4115AC6U output is ratiometric to VCC - any noise or drift on VCC translates directly to the output. Sharing the same 5.0 V rail with the host ADC's reference further cancels supply-induced error.
Route the MPXA4115AC6U analog output trace away from switching converters and clock lines; add a 10 kohm series resistor plus 0.01 uF shunt capacitor as a single-pole low-pass filter before the ADC input. Keep the top axial port at least 3 mm from a heat-generating IC because the gel-protected port has a maximum operating temperature of +125C. Place decoupling capacitor first, then sensing port orientation verify.
Do not connect the NC (no-connect) pins to GND or VCC. The 8 NC pins act as mechanical supports and must remain floating; tying them to a rail can shift the offset calibration. Verify the case 482A-01 pinout from the NXP mechanical drawing before PCB layout - the DigiKey TechForum community thread (ID 62506) shows occasional confusion in pin assignment between variant cases.
Because the MPXA4115AC6U output is ratiometric and bandwidth-limited, typical noise at the output is below 200 uV RMS - still, sample with an averaging ADC to suppress mains-frequency pickup. If the system uses a switching front-end (e.g. a buck regulator at 250 kHz), place the pressure sensor up-stream of the switching stage or behind an LC pi filter. The on-chip temperature compensation ranges from -40C to +125C; designers should not need additional linearization.
Información de cumplimiento
RoHS and REACH compliance per NXP product page. The 8-SMD gull-wing package uses lead-free finish compatible with Pb-free reflow. AEC-Q100 not explicitly listed; contact NXP for automotive PPAP support.
