MPX5100GSX - 100kPa Vented Gauge Pressure Sensor | NXP
MPN: MPX5100GSX ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.75 | $18.75 |
| 10 | $16.5 | $165.00 |
| 100 | $13.8 | $1,380.00 |
| 500 | $11.95 | $5,975.00 |
| 1,000 | $10.4 | $10,400.00 |
MPX5100GSX Overview
A piezoresistive pressure sensor is a transducer that converts applied mechanical pressure into a measurable electrical signal by exploiting the change in resistance of silicon strain gauges diffused into a diaphragm. The output voltage is ratiometric to the supply (typically 5.0 V), meaning the output scales linearly with Vcc, allowing simple A/D conversion in microcontroller-based systems. The MPX5100 specifically belongs to NXP's integrated sensor family, adding laser-trimmed calibration and active temperature compensation on the same monolithic silicon die - features historically found only in higher-cost instrumentation-grade sensors.
Key features of the MPX5100GSX include a pressure range of 0 kPa to 100 kPa (0 psi to 14.5 psi), accuracy of ±2.5% over 0 C to 85 C, sensitivity of 45 mV/kPa (typical), and a supply voltage range of 4.75 V to 5.25 V. The on-chip instrumentation amplifier delivers a low-impedance ratiometric output with high noise immunity, while the vented gauge reference compensates for ambient atmospheric pressure drift in real time.
The silicon diaphragm is micromachined using NXP's proprietary process, with strain gauges arranged in a Wheatstone bridge on the diaphragm surface. Application of pressure deflects the diaphragm, unbalancing the bridge and producing a differential voltage proportional to pressure. The on-chip ASIC converts this differential millivolt signal into a 0.2 V to 4.7 V output through a precision chopper-stabilized amplifier, providing excellent long-term stability and EMI rejection.
Typical applications include HVAC blower pressure monitoring, medical respirators and ventilators, industrial process control, altimeters and barometric instruments, and automotive manifold pressure sensing. The rugged ported SIP housing is suitable for manifold mounting via O-ring seal in pneumatic systems.
The MPX5100GSX is part of NXP's legacy MPX5100 series. NXP recommends a 47 nF decoupling capacitor between Vcc and GND placed as close as possible to the sensor pins. The vent tube must remain unblocked and protected from moisture to maintain accurate gauge reference.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for MPX5100GSX — 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 MPX5100GSX (same form factor and footprint) — differing in Accuracy, Mounting Type, Operating Temperature, Output Type, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MPX5100DP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$12.03 / Unit
View Datasheet →MPX5100ASX
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MPX5100GSX Maximum Ratings & Electrical Characteristics
| Pressure Type | Vented Gauge |
| Pressure Range | 0 kPa to 100 kPa (0 psi to 14.5 psi) |
| Max Overload Pressure | 400 kPa |
| Output Type | Analog, Ratiometric |
| Output Voltage | 0.2 V to 4.7 V |
| Supply Voltage | 4.75 V to 5.25 V |
| Sensitivity | 45 mV/kPa (typical) |
| Accuracy | ±2.5% (0 C to 85 C) |
| Operating Temperature | -40 C to +125 C |
| Port Type | Male Tube, 0.19 inch (4.93 mm) |
| Package | 6-SIP Module (Case 867G) |
| Mounting Type | Through-hole, manifold |
| RoHS Status | Compliant |
| Port Material | Thermoplastic |
MPX5100GSX Pin Configuration
| Pin 1 | Vout — Analog ratiometric pressure output (0.2 V to 4.7 V) |
| Pin 2 | GND — Ground reference |
| Pin 3 | Vcc — Supply voltage (5.0 V nominal) |
| Pin 4 | NC — Not connected (per datasheet) |
| Pin 5 | NC — Not connected (per datasheet) |
| Pin 6 | NC — Not connected (per datasheet) |
Typical Applications
MPX5100GSX is suitable for 6 applications: HVAC Blower Pressure Monitoring, Medical Respirator and Ventilator Sensing, Industrial Process Control Pneumatics, Altimeter and Barometric Instruments, Automotive Manifold Pressure Sensing, Portable Handheld Barometers and Weather Stations.
HVAC Blower Pressure Monitoring
The MPX5100GSX suits HVAC blower and filter pressure monitoring because it measures duct static pressure directly in the 0-100 kPa range typical of residential and commercial airflow systems. The 45 mV/kPa sensitivity provides approximately 0.45 V per inch of water column, accurately resolving filter-loading differential across small pressure drops. The vented gauge reference auto-compensates for altitude and barometric variation, ensuring consistent readings across building elevations. NXP recommends a 1 MΩ series resistor at Vout to limit fault current and a 47 nF ceramic decoupling capacitor within 25 mm of the sensor pins. The 6-SIP Case 867G package mounts easily on a manifold inside the air handler with a single O-ring seal.
Recommended
Medical Respirator and Ventilator Sensing
The MPX5100GSX's 0-100 kPa range and 4.7 V full-scale output make it well-suited for monitoring breathing-circuit pressure in mechanical ventilators, CPAP machines, and anesthesia workstations. According to NXP datasheet MPX5100, the ±2.5% accuracy over 0-85 C is sufficient for clinical pressure verification, while the ratiometric output enables direct ADC sampling without analog signal conditioning. The vented gauge reference tracks ambient pressure changes during patient transport between floors with different elevations. Designers should add a bacterial filter and moisture trap upstream of the sensor port to prevent contamination. The 6-SIP module's ported housing accepts standard medical tubing, simplifying assembly into disposable breathing circuits.
Recommended
Industrial Process Control Pneumatics
For industrial pneumatic control systems, the MPX5100GSX provides reliable tank and line pressure feedback across the 0-100 kPa range typical of factory compressed-air distribution. The on-chip instrumentation amplifier delivers clean 0.2-4.7 V output that interfaces directly to PLC analog inputs and 4-20 mA converters via scaling resistors. The Case 867G housing withstands typical industrial vibration through its rigid ported SIP construction, and the 4.93 mm male tube port accepts standard push-to-connect fittings. Industrial designers should provide a snubber or pressure-relief valve to protect against the 400 kPa overload limit; cumulative overpressure events shift calibration and degrade long-term accuracy.
Recommended
Altimeter and Barometric Instruments
Handheld altimeters, weather stations, and barometric instruments benefit from the MPX5100GSX's calibration accuracy and low power consumption. Although absolute pressure references like the MPX4100A are typically preferred for altitude calculation, the vented gauge configuration is acceptable when the device is calibrated at known altitude and the barometric baseline is updated regularly. The 45 mV/kPa sensitivity resolves approximately 0.25 m altitude (about 25 Pa equals 2 m), adequate for recreational altimeters. The -40 C to +125 C operating range suits outdoor deployment in extreme climates. Designers should provide weatherproof vent tubing to prevent water ingress while permitting atmospheric equalization.
Recommended
Automotive Manifold Pressure Sensing
The MPX5100GSX supports automotive manifold absolute pressure (MAP) sensing applications on legacy fuel-injected engines where microcontroller-based ECU inputs accept analog signals. The 0-100 kPa range covers naturally aspirated manifold vacuum from 20 kPa (idle) to 100 kPa (WOT), and the ratiometric 0.2-4.7 V output provides sufficient dynamic range for fuel mapping across the full engine RPM range. While modern engines use digital sensors like the MPXH6400AC6T1, the MPX5100GSX remains in active use in classic car restoration and aftermarket ECU retrofits where through-hole ported packaging simplifies wiring. Vibration isolation via flexible tubing between manifold and sensor is recommended to prevent fatigue failure.
Recommended
Portable Handheld Barometers and Weather Stations
Battery-powered portable barometers and personal weather stations benefit from the MPX5100GSX's modest current consumption and ratiometric output that scales with battery voltage. By using the battery rail as both supply and ADC reference, designers eliminate regulator-induced drift and extend battery life. The vented gauge port permits rapid response to atmospheric changes (typically 1 Hz update rates suffice for weather trend logging). Adding a waterproof Gore vent membrane over the port enables outdoor exposure while maintaining gauge accuracy. The compact 6-SIP Case 867G package fits within handheld enclosures alongside an LCD, MCU, and coin-cell battery.
Recommended
Recommended Products Summary
Engineering reference data for MPX5100GSX — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MPX5100DP | MPX5100ASX |
|---|---|---|---|
| Package | 6-SIP Module (Case 867G) | 6-SIP Module (Case 867G) - same | 6-SIP Module (Case 867G) - same |
| Brand | NXP Semiconductors | NXP Semiconductors - same | NXP Semiconductors - same |
| Pressure Type | Vented Gauge | Differential | Absolute |
| Pressure Range | 0 to 100 kPa | 0 to 100 kPa | 0 to 100 kPa |
| Sensitivity | 45 mV/kPa | 45 mV/kPa | 45 mV/kPa |
| Supply Voltage | 5.0 V (4.75 V to 5.25 V) | 5.0 V (4.75 V to 5.25 V) | 5.0 V (4.75 V to 5.25 V) |
| Output Voltage | 0.2 V to 4.7 V | 0.2 V to 4.7 V | 0.2 V to 4.7 V |
| Accuracy (0 C to 85 C) | ±2.5% | ±2.5% | ±2.5% |
| Port Configuration | Vented Gauge, 4.93 mm male tube | Differential dual port | Absolute sealed reference |
Key Differentiators
- Highest sensitivity in MPX5100 family (vs MPX4250GP)
- True gauge reference with 4.93 mm tube port (vs MPXV5100GS)
- Through-hole ported form factor for legacy and harsh environments (vs MPXH6101AC6U)
Design Notes
Place a 47 nF ceramic decoupling capacitor between Vcc (pin 3) and GND (pin 1) within 25 mm of the sensor body, per NXP datasheet MPX5100. For applications with noisy 5 V rails (switching supplies, relays, motors), add a 10 µF bulk capacitor in parallel. The output (pin 2) is high-impedance active; add a 1 MΩ series resistor at the output to limit short-circuit current if the ADC input is misconfigured. Use the ADC's supply as the reference voltage to preserve ratiometric accuracy.
Mount the MPX5100GSX with its port oriented vertically or downward to prevent condensate pooling inside the sensor body. Use an O-ring seal sized for the 4.93 mm male tube port during manifold integration. Route the analog output trace away from switching nodes and high-current traces; if this is not possible, surround the trace with a ground pour. The vent tube on the GSX case must remain exposed to ambient atmosphere; do not seal the vent port in potting compound or the gauge reference will drift.
Do not apply pressure exceeding the 400 kPa overload rating; cumulative overpressure events shift calibration even if the device appears undamaged. The output at 0 kPa is 0.2 V (not 0 V) due to the ratiometric transfer function; subtracting this offset in firmware is required to compute gauge pressure accurately. Do not use the sensor in condensing humid environments without a moisture trap, as water in the port leads to corrosion and drift. For battery-powered designs, apply power only during sample windows to limit average current consumption.
Estimated: The MPX5100GSX dissipates approximately 5 mW typical, contributing negligible self-heating. Across the -40 C to +125 C operating range, the on-chip temperature compensation limits accuracy drift to ±2.5%; for sub-1% precision, end-users may need to apply software compensation using a co-located temperature sensor. Avoid mounting the sensor adjacent to heat-generating components (linear regulators, power resistors) to minimize thermal gradients.
Compliance Information
RoHS compliant per NXP product page. MPX5100 series is not AEC-Q100 qualified; for automotive applications choose the MPX5100 automotive-grade variant (e.g., MPX5100ASXT1) or migrate to MPXH6101AC6U.
