NXP Semiconductors MPX4080D

Overview

MPX4080D from Freescale Semiconductor is a monolithic silicon piezoresistive pressure sensor with on-chip signal conditioning, temperature compensation, and factory calibration. It delivers a ratiometric analog output (0.6–4.9 V) over a 0–80 kPa gauge pressure range, operates from 4.85–5.35 V supply, draws ≤10 mA, and maintains ≤3.0% full-scale error across –40°C to +105°C - ideal for microcontroller-based HVAC, medical pneumatic, and industrial process monitoring.

For engineers reviewing the MPX4080D datasheet, MPX4080D pinout, MPX4080D application, or MPX4080D equivalent, key selection criteria include its unibody epoxy package (Case 867-08), differential/gauge pressure sensing capability, 54 mV/kPa sensitivity, decoupling-circuit-dependent electrical compliance, and compatibility with 8-bit/10-bit A/D converters in embedded systems.

Technical Context

The MPX4080D integrates a micromachined silicon diaphragm with thin-film metallization and bipolar signal conditioning circuitry. Its architecture includes two gain stages, on-die temperature compensation networks, and a ground-reference shift circuit - all fabricated monolithically to ensure stable offset and span over temperature.

It functions as a ratiometric transducer: output voltage scales linearly with both applied pressure and supply voltage (V_OUT = V_S × (P × 0.01059 + 0.11280)). The device requires external decoupling (1.0 µF + 470 pF at VS, 0.01 µF at VOUT) per Figure 4 to meet specified accuracy and noise performance.

Key Specifications

Pinout & Package

MPX4080D uses the Case 867-08 unibody epoxy package - a 6-pin, single-port, gauge/differential pressure sensor housing with stainless steel cap (P1 side) and fluorosilicone gel die protection. Pins 4, 5, and 6 are no-connects per internal schematic.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar pressure transducer applications.

Compared with MPX4080D, MPX5050DP offers tighter low-end resolution but insufficient range for 80 kPa use cases, while MPXV7007DP trades analog simplicity for digital flexibility and lower pressure capability - neither is pin-compatible, and both require PCB layout changes.

Availability

MPX4080D is available at Aetrix Electronics and suitable for HVAC control systems, medical pneumatic devices, and industrial process instrumentation requiring stable component supply and long-term calibration consistency.

Supply support for MPX4080D includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Freescale Semiconductor (now part of NXP Semiconductors) was a leading designer of embedded processors and sensors, known for automotive, industrial, and consumer ICs with robust qualification and long-lifecycle support.

The MPX4080D belongs to Freescale's MPX series of integrated silicon pressure sensors - engineered specifically for cost-sensitive, high-volume applications needing calibrated analog output without external signal conditioning.

FAQ

What is the maximum overpressure rating for the MPX4080D?

The MPX4080D has a maximum pressure rating of 400 kPa (absolute), beyond which permanent mechanical damage to the silicon diaphragm may occur. This limit applies regardless of pressure type (gauge or differential) and is independent of operating temperature. Operation above 80 kPa full-scale is permissible only as transient overpressure - sustained exposure degrades accuracy and repeatability. Always refer to the absolute max ratings table in the MPX4080D datasheet for derating guidance.

Does the MPX4080D require external calibration after soldering?

No, the MPX4080D does not require external calibration after soldering. It is factory-calibrated and temperature-compensated across –40°C to +105°C, with total error bounded at ≤3.0% VFSS. However, PCB-level thermal gradients or mechanical stress from board flexure may introduce minor offset shifts; for metrology-grade applications, system-level calibration using known pressure standards is recommended. The MPX4080D's ratiometric design minimizes sensitivity to such variations.

Can the MPX4080D be used with a 3.3 V microcontroller supply?

The MPX4080D requires a nominal 5.1 V supply (range 4.85–5.35 V) and is not rated for direct operation from 3.3 V. Using 3.3 V will cause output saturation below 0.6 V and violate the ratiometric transfer function, resulting in significant nonlinearity and loss of full-scale range. To interface with 3.3 V systems, use a dedicated 5.0 V LDO regulator for the MPX4080D and route its analog output through a level-shifting buffer or resistor divider into the 3.3 V ADC.

What is the correct orientation for mounting the MPX4080D in gauge mode?

In gauge mode, the MPX4080D must be mounted with the stainless steel cap (P1 side) exposed to the measured pressure and the epoxy body side (P2) vented to ambient atmosphere. The P1 side is clearly marked by the metal cap and fluorosilicone gel; incorrect orientation - such as sealing the P1 side or exposing P2 to pressure - will yield inverted or saturated output. Refer to the "Pressure (P1)/Vacuum (P2) Side Identification Table" in the MPX4080D datasheet for visual confirmation.

Is the MPX4080D compatible with non-air media such as CO₂ or nitrogen?

The MPX4080D's qualification and reliability testing were performed using dry air; compatibility with other gases like CO₂ or nitrogen depends on chemical inertness and moisture content. Fluorosilicone gel provides broad resistance, but aggressive or condensing media may degrade long-term performance. Freescale explicitly advises contacting factory application engineering before deploying the MPX4080D with non-air media. For critical applications, media compatibility testing under actual operating conditions is strongly recommended prior to production use of the MPX4080D.