MPXM2051GST1 - 50kPa Gauge Pressure Sensor, 5-SMD | NXP
MPN: MPXM2051GST1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $16.5 | $16.50 |
| 10 | $14.2 | $142.00 |
| 100 | $12.5 | $1,250.00 |
| 500 | $11.1 | $5,550.00 |
| 1,000 | $9.85 | $9,850.00 |
MPXM2051GST1 Overview
A piezoresistive pressure sensor is a MEMS device in which a micromachined silicon diaphragm with embedded piezoresistive strain gauges converts mechanical pressure into a small differential voltage via the Wheatstone-bridge principle; within the sensor taxonomy it sits under MEMS pressure sensors -> pressure sensors -> sensors -> signal conditioning. This category of device is widely used where a precise, ratiometric analog pressure reading is needed without requiring an external front-end IC or ADC.
Key differentiating features of the MPXM2051GST1 include on-chip temperature compensation and factory calibration, eliminating external compensation networks; a typical full-scale span of 40 mV at 10 V excitation (sensitivity ~0.8 mV/V); a maximum combined nonlinearity and pressure hysteresis of approximately ±0.4 %FSS (per the MPXM2051G datasheet); and a top-side tube port that simplifies pneumatic interface in manifold-style assemblies. The 5-SMD MPAK-4 (with tab) form factor suits surface-mount PCB assembly while preserving the through-port geometry.
Technically, the device uses a monolithic silicon diaphragm with an integrated piezoresistive bridge. The differential output is a ratiometric analog voltage whose percentage deviation from nominal span closely tracks the percentage deviation of the input pressure from full scale. The vented-gauge reference allows barometric-pressure-compensated measurements in vented applications, which is critical for medical and HVAC equipment.
Typical applications include medical respiratory instrumentation, HVAC air-flow monitoring, barometric correction for altitude-compensated devices, pneumatic control, and industrial process monitoring. The 50 kPa range suits low-pressure gas and air measurements in portable medical and HVAC equipment.
When designing with this part, prefer a low-noise, regulated excitation source for the 10 V supply to maintain ratiometric accuracy; the bridge output is millivolt-level and requires a low-offset, low-noise instrumentation amplifier with adequate gain to feed an ADC.
This page synthesizes drop-in alternatives, design notes, and FAQ content beyond the manufacturer datasheet to help engineers confidently select and integrate the MPXM2051GST1.
Drop-in alternatives for MPXM2051GST1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MPXM2051GS
✅ Drop-In📋 Reference alternative (not in catalog)
MPXM2051GST1G
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MPXM2053GST1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MPXM2052GST1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MPXM2051GST1 Maximum Ratings & Electrical Characteristics
| Product Type | Piezoresistive Pressure Sensor |
| Operating Pressure Range | 0 kPa to 50 kPa (0 PSI to 7.25 PSI) |
| Pressure Type | Vented Gauge |
| Output Type | Analog Ratiometric Wheatstone Bridge |
| Output Span | 0 mV to 40 mV (at 10 V excitation) |
| Sensitivity | 0.8 mV/V (typical) |
| Excitation Voltage | 10 V (typ); 6 V min recommended |
| Operating Temperature Range | -40 C to +125 C |
| Compensated Temperature Range | 0 C to 85 C |
| Port Configuration | Top port, male 0.117" / 0.12" (2.97 mm) tube |
| Package / Case | 5-SMD Module (MPAK-4 with tab), top port |
| Termination Style | SMD, PCB surface mount |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (per distributor page) |
| Manufacturer | NXP (formerly Freescale) |
MPXM2051GST1 Pin Configuration
| Pin 1 | Vcc — Excitation supply (typically 10 V DC) |
| Pin 2 | GND — Common ground reference for bridge return |
| Pin 3 | Vout+ — Differential positive output of bridge |
| Pin 4 | Vout- — Differential negative output of bridge |
| Pin 5 | TAB/PORT — Top-port tube inlet (2.97 mm) and exposure pad for thermal ground |
Typical Applications
MPXM2051GST1 is suitable for 7 applications: Medical Respiratory / Ventilator Pressure Monitoring, HVAC Air-Flow / Duct Pressure Sensing, Barometric / Altitude Compensation Module, Industrial Process Pneumatic Control, Consumer Appliance Pressure Sensing, Laboratory Gas-Flow Calibrators, Industrial Air-Cushion / Vacuum-Lifter Safety.
Medical Respiratory / Ventilator Pressure Monitoring
The MPXM2051GST1's 0-50 kPa range matches typical airway pressures in CPAP, BiPAP, and ventilator circuits, while its 2.97 mm top port integrates directly into patient tubing manifolds without external plumbing. Its on-chip temperature compensation (0 C to 85 C) keeps calibration stable across warm-up transients common in bedside equipment. The 40 mV span at 10 V is amplified by a low-noise INA128 / AD8422 front-end and routed into the ventilator ADC for accurate flow / pressure loop control.
Recommended
HVAC Air-Flow / Duct Pressure Sensing
In HVAC duct pressure and airflow monitoring, the MPXM2051GST1's 0-50 kPa gauge span and vented-gauge reference deliver barometric-pressure-compensated readings via the top-side tube port. The vented-gauge connection is critical for differential pressure across a venturi or orifice plate in variable-air-volume (VAV) controllers. The 5-SMD top-port design mounts vertically on the duct, simplifying service loops; on-chip compensation cuts BOM cost in distributed air-handler nodes.
Recommended
Barometric / Altitude Compensation Module
The MPXM2051GST1 measures absolute atmospheric pressure trends via the vented-gauge reference, providing reference data for altitude-compensated devices such as GPS receivers, fitness wearables, and weather stations. While it is not a full altimeter IC, its low-pressure range and linear output suit barometric aid-modes where high-accuracy reference pressure is required. Pairing it with a low-dropout regulator (e.g., NCP58300) ensures clean 10 V excitation for ratiometric accuracy.
Recommended
Industrial Process Pneumatic Control
In low-pressure pneumatic control loops (compressors, gas-leak testers, vacuum hold-down tables), the MPXM2051GST1's 0-50 kPa gauge span covers the standard pneumatic working range up to 50 kPa. The ratiometric analog output interfaces directly with industrial PLC analog inputs (4-20 mA loops when paired with a voltage-to-current converter such as XTR105). The vertical top port simplifies manifold integration in pressure regulator modules used on factory automation lines.
Recommended
Consumer Appliance Pressure Sensing
Vacuum cleaners, air purifiers, and white-goods pressure monitoring modules benefit from the MPXM2051GST1's compact 5-SMD footprint and 0-50 kPa range. The vented-gauge reference handles barometric variation across consumer environments, and the surface-mount package supports high-volume reflow production. The 40 mV span feeds the appliance MCU's ADC through a simple op-amp gain stage, eliminating expensive signal-conditioning ASICs in cost-sensitive designs.
Recommended
Laboratory Gas-Flow Calibrators
In laboratory gas-flow calibrators and rotameter-style reference instruments, the MPXM2051GST1 provides a stable, low-drift pressure reference with documented linearity. The 0.8 mV/V sensitivity and ratiometric output allow direct cross-calibration against laboratory mass-flow standards when excitation is derived from a precision reference such as REF5025. The on-chip calibration eliminates individual device trimming, reducing instrument build time.
Recommended
Industrial Air-Cushion / Vacuum-Lifter Safety
Air-cushion material handlers and vacuum-lifter safety interlocks require redundant pressure sensing on suction-pad lines; the MPXM2051GST1 is well-suited for this application given its 0-50 kPa gauge range and small SMT footprint. The on-chip compensation keeps readings consistent across ambient shifts in factory environments. A safety PLC can derive an under-pressure condition within 100 ms from the analog span, enabling rapid shutoff when suction pads lose grip on the workpiece.
Recommended
Recommended Products Summary
Engineering reference data for MPXM2051GST1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MPXM2051GS | MPXM2051GST1G | MPXM2053GST1 | MPXM2052GST1 |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 5-SMD Module (MPAK-4 with tab), top port | 5-SMD Module (MPAK-4 with tab), top port - same | 5-SMD Module (MPAK-4 with tab), top port - same | 5-SMD Module (MPAK-4 with tab), top port - same | 5-SMD Module (MPAK-4 with tab), top port - same |
| Pressure Range | 0 to 50 kPa (Gauge) | 0 to 50 kPa (Gauge) | 0 to 50 kPa (Gauge) | 0 to 50 kPa (Gauge, related transfer code) | 0 to 50 kPa (Gauge, related transfer code) |
| Output Span @ 10 V | 0 mV to 40 mV | 0 mV to 40 mV | 0 mV to 40 mV | Similar 40 mV span (per 2053 family) | Similar 40 mV span (per 2052 family) |
| Sensitivity | 0.8 mV/V | 0.8 mV/V | 0.8 mV/V | 0.8 mV/V | 0.8 mV/V |
| Temperature Compensation | On-chip, 0 C to 85 C | On-chip, 0 C to 85 C | On-chip, 0 C to 85 C | On-chip, 0 C to 85 C | On-chip, 0 C to 85 C |
| Port Configuration | Top, male 2.97 mm tube | Top, male 2.97 mm tube | Top, male 2.97 mm tube | Top, male 2.97 mm tube | Top, male 2.97 mm tube |
| Supply Voltage | 10 V typical | 10 V typical | 10 V typical | 10 V typical | 10 V typical |
Key Differentiators
- On-chip temperature compensation and factory calibration (vs Discrete piezoresistive bridge (e.g., raw MPX2050 series without trim))
- Vented-gauge reference in same MPAK-4 package (vs Sealed-gauge MPXM2010GST1)
- 40 mV FSS span at 10 V keeps the bridge output directly ADC-readable with a single in-amp stage (vs Lower-span sensors requiring charge-amplifier stages)
- Top-port 5-SMD package enables vertical manifold mounting in space-constrained assemblies (vs Through-hole MPX2050GP side-port)
Design Notes
Estimated: The MPXM2051GST1 bridge draws ~6 mA typical at 10 V excitation. Use a low-noise, low-dropout regulator with 20 mV or better line regulation (e.g., NCP58300 or LT3042) to keep the ratiometric output stable; supply noise feeds straight through to the millivolt-level output. Place a 100 nF decoupling cap and a 10 uF bulk capacitor at the Vcc pin, with the bulk cap within 10 mm of the IC for clean reference across varying pneumatic loads.
The 40 mV FSS bridge output must be amplified by a low-noise instrumentation amplifier with input-referred noise below 5 nV/sqrt(Hz); an INA128 or AD8422 with gain of ~100 produces a 0-4 V signal for 12-bit ADC input. Twisted-pair or shielded routing from the sensor pins to the in-amp is critical because the differential signal sits at the millivolt level and is highly susceptible to mains-frequency pickup. Add a passive RC low-pass (1 kHz cutoff) before the ADC for anti-aliasing.
The MPAK-4 with tab package requires an exposed-pad land pattern under the top-port body for both thermal dissipation and mechanical rigidity. Route the supply and bridge outputs as differential pairs from the IC pads directly to the in-amp inputs, and avoid routing digital signals under or parallel to the bridge traces to prevent switching-noise coupling. The top port must be sealed against moisture/condensate in medical or HVAC use; deploy a silicone O-ring or membrane between the manifold interface and the port.
Do not exceed the 10 V maximum excitation; overvoltage will permanently damage the bridge. The 2.97 mm tube port has a specific orientation (top-mount only); mounting it sideways will stress the sensor die and cause long-term drift. Always run the system through thermal soak at 25 C, 50 C, and 85 C during calibration to verify the on-chip compensation is within ±0.4 %FSS error budget. Avoid applying pressure transients above 150 %FSS (75 kPa) which may exceed the proof-pressure rating.
Estimated: With 60 mW dissipation (10 V × 6 mA), the junction temperature rise above ambient on the MPAK-4 land is ~5-10 C with a minimal copper pad (50 mm^2) and ~2-3 C with a 100 mm^2 copper pour. The MPXM2051GST1 is characterized for 0-85 C compensated range but rated for -40 C to +125 C; in cold-storage or outdoor applications, place a thermal screen in front of the port inlet to prevent condensation entering the cavity.
Compliance Information
RoHS compliance confirmed via DigiKey product page (P/N 1168417); lead-free per NXP product page. AEC-Q100 not applicable - this is a pressure sensor, not an automotive-qualified IC. For halogen-free status, contact NXP directly.
