MPX12D - 10 kPa Diff Pressure Sensor, 4-SIP | NXP Semiconductors
Référence : MPX12D ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $8.9 | $8,90 |
| 10 | $7.65 | $76,50 |
| 100 | $6.2 | $620,00 |
| 500 | $5.4 | $2 700,00 |
| 1 000 | $4.75 | $4 750,00 |
MPX12D Présentation
A piezoresistive pressure sensor is a MEMS device in which a silicon diaphragm with an embedded Wheatstone bridge deforms under applied pressure, changing bridge resistance and producing a differential output voltage proportional to pressure. As an uncompensated transducer, the MPX12D exposes the raw bridge outputs so the system designer can apply custom linearization, temperature correction, and amplification in downstream analog circuitry. The MPX12 series sits within the broader taxonomy of pressure sensors -> MEMS sensors -> transducers -> sensors, and serves as a foundational building block in medical, industrial, and HVAC pressure measurement.
Key features of the MPX12D include a 0 to 55 mV full-scale output at 3 V supply, ±5% linearity, single-element strain gauge design for predictable compensation, PCB termination, and a female pressure port of 0.136 inch (3.45 mm). The 4-SIP module package provides a robust through-hole mechanical interface with a barbed port for tubing connection. Because the sensor is uncompensated, downstream op-amps such as the MPX2010DP and instrumentation amplifiers are typically required to amplify the millivolt-level output to a usable 0-5 V or 4-20 mA signal.
The MPX12D uses NXP's patented silicon shear strain gauge process, in which four piezoresistors are ion-implanted into a single silicon diaphragm. This monolithic single-element design yields excellent long-term stability and predictable thermal behavior compared to multi-element compensated sensors. Designers add external temperature compensation and amplification networks because the raw bridge output varies with temperature - typically a few percent of full scale across 0-85 °C. NXP's MPX2010 and MPX2050 series offer similar packages with higher pressure ranges (up to 50 kPa), allowing scaling within the same design footprint.
Typical applications include medical ventilators and respiratory monitoring, HVAC air-flow measurement, industrial process control, barometric pressure sensing, and altitude measurement in portable instrumentation. The differential configuration is well suited to cleanroom pressure drop monitoring and CPAP/BPAP airflow sensing where bidirectional pressure detection is required.
When designing with the MPX12D, plan the signal chain around a low-noise instrumentation amplifier (e.g., INA122 or AD620) with gain of 50-100 to scale the 55 mV full-scale output to 2.7-5.5 V. Add a temperature-compensation network using an NTC thermistor or dedicated analog temperature correction to maintain accuracy across 0-70 °C operating range.
This page synthesizes drop-in alternative listings, distributor pricing tiers, and practical signal-conditioning design notes that go beyond the manufacturer datasheet summary.
Alternatives de remplacement direct pour MPX12D — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec MPX12D (même facteur de forme et même empreinte) — différant par Output Type, Operating Temperature, Linearity, Compensation, Mounting Type.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MPX12DP
✅ Remplacement direct✓ En stock
$9.75 / unité
Voir la fiche technique →MPX12GP
✅ Remplacement direct✓ En stock
$10.5 / unité
Voir la fiche technique →MPX2010DP
✅ Remplacement direct✓ En stock
$8.5 / unité
Voir la fiche technique →MPX2050DP
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MPX12D Valeurs maximales et caractéristiques électriques
| Pressure Type | Differential |
| Operating Pressure | 1.45 PSI (10 kPa) |
| Maximum Overload Pressure | 10.88 PSI (75 kPa) |
| Full-Scale Output Voltage | 0 to 55 mV (at 3 V supply) |
| Tension d'alimentation | 3 V typical |
| Accuracy | ±5% |
| Type de sortie | Wheatstone Bridge (uncompensated) |
| Termination Style | PCB (through-hole) |
| Boîtier | 4-SIP Module |
| Port Size | Female, 0.136 in (3.45 mm) |
| Port Style | No Port (base-side pressure inlet) |
| Technology | Piezoresistive MEMS silicon shear strain gauge |
| Compensation | Uncompensated (external compensation required) |
| Température de fonctionnement | 0 °C to +85 °C |
| Type de montage | Through-Hole |
Configuration des broches de MPX12D
| Broche 1 | VCC — Bridge excitation supply (3 V typical) |
| Broche 2 | VOUT+ — Positive bridge output |
| Broche 3 | GND — Ground reference for bridge |
| Broche 4 | VOUT- — Negative bridge output |
Applications typiques
MPX12D convient pour 7 applications: Medical Ventilator & CPAP Airflow Sensing, HVAC Airflow & Duct Pressure Monitoring, Industrial Process Control & Pneumatic Systems, Barometric Pressure & Altitude Measurement, Portable Medical Diagnostic Devices, Liquid Level & Tank Pressure Monitoring, Drone & UAV Airspeed Sensing.
Medical Ventilator & CPAP Airflow Sensing
The MPX12D's 0-10 kPa differential range and bidirectional pressure response make it ideal for medical ventilator, CPAP, and BiPAP airflow sensing where bidirectional flow measurement across an orifice plate or flow restrictor is required. With ±5% accuracy and 55 mV full-scale output at 3 V excitation, the sensor delivers predictable millivolt-level signals that a downstream INA122 instrumentation amplifier can scale to clinical-grade pressure readings, supporting breath-by-breath flow monitoring. NXP's monolithic silicon shear strain gauge provides the long-term stability required for patient-monitoring equipment, and the 4-SIP module's barbed port accepts standard medical tubing. The MPX12D's 0-85 °C operating range covers the temperature span of typical respiratory circuits, and the device's small footprint supports integration into compact handheld ventilator designs used in portable and home-care settings.
Recommandé
HVAC Airflow & Duct Pressure Monitoring
The MPX12D provides differential pressure sensing for HVAC duct airflow measurement, cleanroom pressure differential monitoring, and variable-air-volume (VAV) box control. Its 10 kPa full-scale range covers typical duct static pressure spans (0-250 Pa to 0-1000 Pa) when paired with a Pitot tube or orifice pressure tap, and the uncompensated output lets the HVAC controller apply its own linearization across the operating temperature range. With 75 kPa overload tolerance, the MPX12D survives sudden duct pressure surges such as filter-loading transients. The 4-SIP module's through-hole port geometry accepts standard 1/8 inch or 3 mm tubing, simplifying field installation, while the millivolt-level output integrates with most building automation analog input modules after external amplification.
Recommandé
Industrial Process Control & Pneumatic Systems
The MPX12D is well suited to industrial low-pressure process control where 0-10 kPa differential measurement is required, such as leak detection, vacuum measurement, and pneumatic pressure verification. Its uncompensated bridge output allows the PLC or process controller to apply proprietary temperature calibration, which is valuable in factory automation where ambient temperature swing is significant. The device's ±5% accuracy and 1.45 PSI operating range cover many bench-top and shop-floor applications including air-bearing pressure, vacuum chuck pressure monitoring, and gas-flow verification. The 4-SIP module provides mechanical robustness for industrial environments, and the standard 3 V excitation supports simple battery-powered handheld pressure calibrators.
Recommandé
Barometric Pressure & Altitude Measurement
The MPX12D's 10 kPa operating range covers approximately 0-100 mbar of differential measurement, which translates well to barometric trend monitoring and altitude calculation when paired with a reference pressure port on the opposite side. Although not a direct atmospheric absolute sensor, the MPX12D's bidirectional differential response can be used as part of a differential barometric measurement system with one side referenced to a sealed vacuum. Combined with an external ADC (e.g., ADS1115) and a low-noise op-amp front-end, the MPX12D enables portable weather stations, drone altitude sensing, and hiking GPS devices where altitude-derived pressure data is required. The 0-85 °C range covers most outdoor consumer operating conditions.
Recommandé
Portable Medical Diagnostic Devices
The MPX12D supports portable medical diagnostic instruments such as spirometers, peak-flow meters, sleep apnea detection devices, and anesthesia gas monitoring where low-pressure airflow or pressure measurement is needed. Its small 4-SIP footprint enables integration into handheld form factors, and the uncompensated 55 mV output lets the device designer choose precision components for the analog front-end. The MPX12 series has been referenced in NXP application notes for medical applications requiring low-pressure sensing, and the silicon shear strain gauge design provides repeatable measurements across thousands of patient-use cycles. Battery-powered operation is supported by the 3 V supply rail commonly available in portable medical electronics.
Recommandé
Liquid Level & Tank Pressure Monitoring
The MPX12D can be configured for liquid level measurement by sensing the hydrostatic pressure differential between the bottom of a tank and a reference column, providing accurate 0-10 kPa level sensing for non-pressurized reservoirs. The differential Wheatstone bridge rejects common-mode atmospheric pressure changes, making the measurement stable under varying weather conditions. The 4-SIP module's female port accepts flexible tubing that can be routed into the tank, and the 75 kPa overload rating protects against water-hammer transients. With external amplification and ADC digitization, the MPX12D delivers reliable level data for water management, chemical dosing systems, and agricultural irrigation monitoring.
Recommandé
Drone & UAV Airspeed Sensing
The MPX12D's 10 kPa span and millivolt sensitivity suit small fixed-wing drone and UAV airspeed measurement via a Pitot-static probe, providing differential pressure between total and static pressure ports that translates to indicated airspeed. The lightweight 4-SIP module adds minimal mass to UAV airframes, and the 0-85 °C operating range covers low-altitude flight conditions. The MPX12D's fast response time (typically <1 ms mechanical) supports dynamic pressure fluctuations during maneuvering, and the uncompensated output allows the flight controller to apply custom calibration curves. Designers pair the sensor with a low-power op-amp and the flight controller's onboard ADC for a compact airspeed data acquisition system.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MPX12D — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MPX12DP | MPX12GP | MPX2010DP | MPX2050DP |
|---|---|---|---|---|---|
| Package | 4-SIP Module | 4-SIP Module - same | 4-SIP Module - same | 4-SIP Module - same | 4-SIP Module - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Pressure Type | Differential | Differential | Gauge | Differential | Differential |
| Operating Pressure | 1.45 PSI (10 kPa) | 1.45 PSI (10 kPa) | 1.45 PSI (10 kPa) | 1.45 PSI (10 kPa) | 7.25 PSI (50 kPa) |
| Full-Scale Output | 0 to 55 mV at 3 V | 0 to 55 mV at 3 V | 0 to 55 mV at 3 V | 0 to 5 V (amplified) | 0 to 40 mV at 10 V |
| Supply Voltage | 3 V | 3 V | 3 V | 5 V to 10 V (amplifier supply) | 10 V |
| Compensation | Uncompensated (raw bridge) | Uncompensated | Uncompensated | Integrated op-amp (amplified) | Uncompensated |
| Accuracy | ±5% | ±5% | ±5% | ±5% | ±5% |
| Maximum Overload | 10.88 PSI (75 kPa) | 10.88 PSI (75 kPa) | 10.88 PSI (75 kPa) | 10.88 PSI (75 kPa) | 29 PSI (200 kPa) |
Principaux différenciateurs
- Uncompensated raw bridge output for maximum design flexibility (vs MPX2010DP)
- Low-pressure 10 kPa range with bidirectional differential response (vs MPX2050DP)
- Single 3 V supply operation for portable and battery-powered designs (vs MPX2050DP)
Notes de conception
Drive the bridge with a precision 3.000 V reference such as the REF3033 or equivalent low-noise LDO, NOT a switching regulator or digital supply rail. Switching noise couples directly into the 55 mV full-scale bridge signal at gain 50-100, where 1 mV of supply ripple becomes 50-100 mV at the amplifier output - enough to obscure the actual pressure reading. Add a 10 µF ceramic + 1 µF ceramic + 0.1 µF ceramic decoupling stack at the VCC pin of the MPX12D, with the smallest capacitor closest to the pin.
Use a true instrumentation amplifier (INA122, AD620, INA333) rather than a single op-amp difference amplifier - the INA's high common-mode rejection (>80 dB at DC) eliminates ground-loop errors between the bridge and the ADC. Set amplifier gain to 60-80 so the 55 mV full-scale output scales to 3.3-4.4 V at the ADC input for a 3.3 V rail, leaving 0.5-1 V of headroom for overpressure events. Add a 100 nF capacitor across the feedback resistor to filter high-frequency noise without affecting the signal bandwidth.
Estimated: the uncompensated MPX12D drifts roughly 0.5-1% of full scale per 10 °C temperature change, so a 50 °C ambient swing causes 2.5-5% FS error - on par with the device's stated ±5% accuracy. Add an NTC thermistor network (10 kΩ at 25 °C, β=3950) in the gain-setting or reference-current path to compensate, OR digitize the temperature via MAX31825 and apply digital correction in firmware. Do not assume the bridge is calibrated at room temperature only - production testing across 0-70 °C is required for medical and HVAC designs.
Keep the instrumentation amplifier within 50 mm of the MPX12D pins to minimize noise pickup on the millivolt-level bridge output traces. Use a guarded analog ground plane under the sensor and amplifier, and route VOUT+ and VOUT- as a parallel differential pair with matched trace impedance. Keep digital switching signals (PWM, I2C clock) at least 5 mm away from the bridge traces to avoid capacitive crosstalk into the high-gain analog signal path.
Informations de conformité
RoHS and lead-free status confirmed per NXP product family documentation. The MPX12D is not AEC-Q100 qualified as it is targeted at medical and industrial applications, not automotive. Specific REACH and halogen-free declarations should be confirmed via NXP material declaration sheet (MDS) for the part number.