NXP USA Inc. MPXM2102AST1

Introduction to NXP MPXM2102AST1 Pressure Sensor

The NXP MPXM2102AST1 is an absolute pressure sensor designed for high-accuracy and reliability in electronic measurement systems. Based on NXP’s silicon piezoresistive technology, the MPXM2102AST1 provides a linear, ratiometric voltage output directly proportional to applied pressure within a compact surface-mount package. With a full-scale range of 14.5 psi (100 kPa), this device targets engineers designing for applications such as barometry, process automation, HVAC, medical diagnostics, and other systems requiring precise measurement of absolute pressure.

The MPXM2102AST1 uses a single silicon diaphragm die with on-chip integrated thin-film resistors and strain gauges, providing a monolithic solution that is temperature compensated and factory calibrated. This offers rapid integration for system designers and reduces the need for extensive external signal conditioning.

Main Characteristics and Operating Mechanisms of MPXM2102AST1

At the core of the MPXM2102AST1 is a Wheatstone bridge configuration using piezoresistive elements. This topology generates an analog output voltage that varies linearly with applied pressure, enhancing measurement accuracy and allowing straightforward interface with analog acquisition systems.

Key features include:

Pressure Sensing Range: Absolute type, spanning 0 to 14.5 psi (0 to 100 kPa).

Ratiometric Output: 0-40 mV full-scale (at 10 V excitation), ideal for ratiometric ADCs or analog comparators.

Temperature Compensation: On-chip trimming and calibration provide accuracy across standard operating temperatures (0°C to +85°C), with extended functionality from -40°C to +125°C.

Overpressure Tolerance: Maximum pressure rating of 58.02 psi (400 kPa), providing robustness in demanding conditions.

Compact MPAK Package: 5-pin, top-port, surface-mount module with a 0.12” (2.97mm) male tube for direct pressure interface.

Stable, Low Offset and Hysteresis: Ensures minimal drift under fluctuating operating conditions.

The pressure is applied via the top-side tube port, and the sensor’s stainless steel cap construction ensures protection of the integrated die and internal wire bonds. Internally, a thin silicone gel isolates the sensor from contaminants, allowing air media compatibility with minimal degradation over time.

MPXM2102AST1 Technical Specifications and Working Environment

Engineers evaluating the MPXM2102AST1 will find detailed performance metrics critical to system design:

Input Voltage Range: 10 V to 16 V DC supply (ratiometric operation is specified within this range for minimal self-heating error).

Full Scale Output: Typical 40 mV (minimum 38.5 mV, maximum 41.5 mV) at full rated pressure.

Offset Voltage: ±2.0 mV max for the absolute series.

Sensitivity: Nominal 0.4 mV/kPa.

Linearity: Within ±1.0% of full-scale span (worst-case, endpoint straight line fit).

Hysteresis: Pressure—±0.1% VFSS; Temperature—±0.5% VFSS (over -40°C to +125°C).

Output Impedance: 1400–3000 Ω, suitable for high-impedance analog inputs.

Input Impedance: 1000–2500 Ω.

Response Time: 1.0 ms (10% to 90% full-scale), supporting dynamic measurement tasks.

Warm-Up Time: Typical 20 ms after power application.

The device carries RoHS3 environmental and REACH compliance, with a moisture sensitivity level not applicable, simplifying inventory and regulatory management. Operation is characterized using dry air as the pressure media; using other media requires compatibility evaluation.

Physical Packaging, Installation, and Pin Configuration of MPXM2102AST1

The MPXM2102AST1 comes in a compact 5-pin MPAK SMD module designed for straightforward integration into modern PCBs. The module includes a top-side pressure port (male, 0.12"/2.97mm tube) for direct line attachment, and gull wing leads for surface mounting, facilitating automated pick-and-place and soldering operations.

Mechanical dimensions:

Body: approximately 15.1–16.0 mm x 13.1–13.6 mm, with a height near 5 mm.

Lead Spacing: 2.54 mm typical, compliant with standard PCB layout footprints.

Port Construction: The pressure interface side uses a stainless steel cap, with the port aligned with the case feature for simplified visual identification during assembly.

Proper orientation is crucial for accurate readings — the P1 pressure side corresponds to the side with the port attached. Surface mounting must respect standard handling precautions, with storage and use limited to -40°C to +125°C to avoid long-term sensor degradation.

Uses and Engineering Applications of MPXM2102AST1

The MPXM2102AST1’s mix of accuracy, size, and temperature performance broadens its engineering reach across several fields. Its ratiometric output is readily interfaced with analog-to-digital conversion systems, such as microcontroller-based sensor platforms or industrial data loggers.

Key use cases include:

Barometric pressure monitoring in environmental sensors.

Medical devices, such as diagnostic equipment needing reliable absolute pressure feedback.

Industrial automation for pump/motor control, pressure switches, or system safety monitoring.

Robotics and process control where feedback accuracy is essential for closed-loop operation.

Level detection in fluid tanks or reservoirs.

Unlike gauge or differential types, the MPXM2102AST1 senses absolute pressure via an internal sealed vacuum reference, making it optimal for applications where reference to atmospheric pressure is not required or external barometric fluctuation should be excluded.

Alternative and Substitute Options for MPXM2102AST1

Selecting a pressure sensor often involves evaluating potential alternatives, either for second-sourcing or future-proofing designs. Within the broader NXP MPX2102 family, several options offer complementary or substitute pinouts and features:

MPXM2102A: Same family absolute sensor, various package options for fit/form/functiom compatibility.

MPXM2102AT1: Tape and reel variant of the above, ideal for high-volume SMT assembly.

MPX2102A (Unibody Package): Through-hole variant, suited for less dense, manually assembled boards.

Other MPX2102 Series models: Differential (MPXM2102D) and gauge (MPXM2102G) types accommodate different application requirements.

Comparable gauge or differential sensors may also be found in the broader NXP, Honeywell, or TE Connectivity silicon pressure sensor portfolios, but careful review of output type (voltage, span, impedance) and package details is advised.

When replacing the MPXM2102AST1 with an alternative model, key considerations include package dimensions, supply voltage range, maximum pressure ratings, and output characteristics (including ratiometric behavior and temperature compensation).

Conclusion

The NXP MPXM2102AST1 stands out as a highly integrated, precision absolute pressure sensor optimized for demanding industrial, medical, and environmental measurement systems. Its robust construction, linear output, and compact SMT package address both design accuracy and manufacturing efficiency. For engineers and procurement specialists, the MPXM2102AST1 provides a reliable, well-specified solution—supported by NXP’s legacy in pressure sensing—that can be confidently deployed wherever accurate absolute pressure measurement is critical. Access to a range of related models ensures maintainability and design longevity across evolving product requirements.