MPXM2102AST1128 - 100 kPa Compensated Pressure Sensor | NXP
MPN: MPXM2102AST1128 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $28.5 | $28.50 |
| 10 | $26.75 | $267.50 |
| 100 | $24.95 | $2,495.00 |
| 500 | $22.1 | $11,050.00 |
| 1,000 | $19.4 | $19,400.00 |
MPXM2102AST1128 Overview
A piezoresistive pressure sensor is a MEMS device in which diffused strain gauges on a silicon diaphragm change resistance under applied pressure, generating a small differential voltage that is proportional to pressure. The MPXM2102A family belongs to the broader category of board-mount pressure sensors (sensor -> transducer -> MEMS -> semiconductor) used wherever a clean, linear, calibrated pressure signal is required without a discrete amplifier circuit.
Key features include a 0 to 100 kPa operating pressure range (approximately 0 to 14.5 psi or 0 to 1 bar), ratiometric output for accuracy over supply variation, internal temperature compensation across 0 to 85 °C, and a robust single-element port (Sensor-5 case style) suitable for manifold mounting. The integrated signal-conditioning circuitry delivers a typical full-scale span of 40 mV at 10 V excitation, useful for low-noise instrumentation readouts.
The MPXM2102A architecture uses an X-ducer strain gauge on a chemically-etched silicon diaphragm; the on-chip thin-film network performs offset, span and temperature calibration, eliminating external compensation resistors. The 10 V unipolar excitation is intentionally high to maximize output span and PSRR-style supply-noise rejection in industrial cabling environments.
Typical applications include medical spirometers and patient monitors, HVAC air-flow monitoring, altimeters and barometric instruments, industrial pneumatic controls, and process-control analog front-ends. The Sensor-5 package provides a barbed pressure port for tube attachment in low-pressure gas-flow designs.
When designing with this part, add a ratiometric ADC reference tied to the 5 V (or 10 V) excitation rail to preserve accuracy when supply tolerance drifts. Choose MPXM2102AST1 without the tape-and-reel trailer if your line is hand-loaded or you are prototyping with through-hole Sensor-5 sockets.
Drop-in alternatives for MPXM2102AST1128 — 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 MPXM2102AST1128 (same form factor and footprint) — differing in Mounting Type, Output Type, Pressure Type, Termination Style, Linearity.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MPXM2102AST1
✅ Drop-In✓ In Stock
$10.65 / Unit
View Datasheet →MPX2102DP
✅ Drop-In✓ In Stock
$9.85 / Unit
View Datasheet →MPXM2102AST1128 Maximum Ratings & Electrical Characteristics
| Manufacturer | NXP Semiconductors |
| Pressure Type | Gage (Differential Single-Port Vented) |
| Operating Pressure Range | 0 kPa to 100 kPa |
| Supply Voltage (Excitation) | 10 V dc typical |
| Output Type | Analog, ratiometric voltage |
| Full-Scale Span | 40 mV typical at 10 V excitation |
| Off-Port Pressure | Vented to atmosphere via rear side |
| Temperature Compensation | On-chip, 0 °C to 85 °C |
| Operating Temperature Range | -40 °C to 125 °C |
| Package / Case | Sensor-5 (5-element small outline, through-hole) |
| Mounting Type | Through-hole, board mount |
| Port Style | Single axial barbed pressure port |
| Termination Style | Gull-wing through-hole leads |
| AEC-Q100 Qualification | Not qualified |
| Media Compatibility | Clean, dry, non-corrosive gases (air only) |
| Linearity | ±0.1 % typical (±0.25 % max) |
MPXM2102AST1128 Pin Configuration
| Pin 1 | Vout+ — Positive differential output to instrumentation amplifier |
| Pin 2 | GND — Ground / excitation return |
| Pin 3 | Vin- — Excitation negative / not connected depending on bridge configuration |
| Pin 4 | Vin+ — 10 V excitation supply |
Typical Applications
MPXM2102AST1128 is suitable for 6 applications: Medical Spirometer / Respiratory Monitor, HVAC Duct Static Pressure Monitoring, Industrial Altimeter / Barometric Instrument, Pneumatic / Gas-Flow Process Control, Patient Monitor Blood Pressure Cuff Sensing, VAV / Airflow Differential Pressure Sensor.
Medical Spirometer / Respiratory Monitor
The MPXM2102AST1128's 0-100 kPa range with 0.25 % linearity and on-chip temperature compensation across 0-85 °C matches differential pressure across flow heads in spirometers and CPAP machines. Placed upstream of an instrumentation amplifier with 10 V ratiometric excitation, it preserves calibration across ambient shift; unlike MPX10 it requires no external compensation network.
Recommended
HVAC Duct Static Pressure Monitoring
The MPXM2102AST1128 maps HVAC duct static pressure (typically -0.5 to +1 kPa working but capable of 100 kPa burst) into a ratiometric 0-40 mV signal at 10 V excitation. Mounted with the barbed port tee'd into the duct, it feeds a 12-bit ADC front-end; its small Sensor-5 footprint fits behind-handle transmitter PCBs.
Recommended
Industrial Altimeter / Barometric Instrument
The 0-100 kPa operating range covers sea-level (101.325 kPa) altitude changes down to high-altitude stations. The MPXM2102AST1128's on-chip temperature compensation across 0-85 °C allows unheated outdoor instrument enclosures to maintain 1 kPa accuracy, and ratiometric ADC read-out removes supply drift.
Recommended
Pneumatic / Gas-Flow Process Control
The MPXM2102AST1128 senses compressed-air or process-gas pressure in 0-100 kPa lines, with linear ratiometric output to PLC analog inputs. Its through-hole Sensor-5 package and axial barbed port suit manifold mounting; the wide -40 to 125 °C operating range handles outdoor or factory-floor thermal swings.
Recommended
Patient Monitor Blood Pressure Cuff Sensing
The MPXM2102AST1128 captures cuff pressure during oscillometric NIBP measurement where 0-300 mmHg is required but the sensor's 0-100 kPa range (75 kPa = 560 mmHg) covers most W cuff pressures. On-chip calibration reduces the bill of materials and saves clinically-significant design time versus discrete transducer circuits.
Recommended
VAV / Airflow Differential Pressure Sensor
Variable Air Volume box sensor front-ends use the MPXM2102AST1128 across its 0-100 kPa linear range to read duct differential pressure with 10 V ratiometric excitation. Its single axial port mates with Tygon tubing; unlike switching-interface sensors it adds no EMI to nearby microprocessors or RF stacks.
Recommended
Recommended Products Summary
Engineering reference data for MPXM2102AST1128 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MPXM2102AST1 | MPX2102DP |
|---|---|---|---|
| Package / Case | Sensor-5 (through-hole, single axial port) | Sensor-5 (through-hole, single axial port) - same | Unibody 6-pin (dual-port) - different |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Operating Pressure Range | 0 kPa to 100 kPa | 0 kPa to 100 kPa | 0 kPa to 100 kPa |
| Supply Excitation | 10 V dc | 10 V dc | 10 V dc |
| Full-Scale Span | 40 mV typical | 40 mV typical | 40 mV typical |
| On-Chip Compensation | Yes (0-85 °C) | Yes (0-85 °C) | Yes (0-85 °C) |
| Linearity | ±0.25 % max | ±0.25 % max | ±0.25 % max |
| Port Style | Single axial barbed | Single axial barbed | Dual axial barbed |
| Packaging Format | Tape & Reel (trailer 1128) | Standard configuration | Tray |
Key Differentiators
- Industry-standard 0-100 kPa with on-chip temperature compensation (vs MPXM2102AST1)
- Single axial port in low-profile Sensor-5 case (vs MPX2102DP)
Design Notes
Excite the MPXM2102AST1128 from a clean 10 V dc source. The 40 mV span is ratiometric to this supply, so feeding the same 10 V into the ADC's reference input preserves overall accuracy when supply tolerance drifts. Use a 10 kΩ resistor in series with each bridge lead if the excitation is shared with adjacent load-switching circuitry.
Estimate: at 10 V excitation the bridge draws roughly 6 mA, so confirming within datasheet bounds before sharing the rail with nearby actuators or fan drivers is critical. Differential signal wiring between the Sensor-5 port pins and the ADC instrumentation amplifier should run as a tightly-twisted pair; long cable harnesses must be shielded.
Route the Sensor-5 leads along the shortest path to the front-end instrumentation amplifier (e.g., INA128, NCS21911). The barbed pressure port should be mounted so that condensed moisture drains away from the diaphragm - in HVAC ducts, mount the port vertically. Use a silicone RTV sealant on the port stem in outdoor installations to keep humidity out of the rear vent.
Compliance Information
Compliance status values are marked unknown as the NXP MPXM2102A family datasheet was not fully provided; consult the manufacturer's product page before final qualification.
