NXP Semiconductors MPX5999D Differential Pressure Sensor, 0-1 MPa, 4.5 mV/kPa, 6-Pin SIP

The MPX5999D provides an analog voltage output with a sensitivity of 4.5 millivolts per kilopascal (mV/kPa). This ratiometric output is proportional to the applied differential pressure and the supply voltage, making it directly compatible with microcontroller ADC inputs.

The sensor requires a single DC supply voltage between 4.75V and 5.25V. It is designed for standard 5V system operation. The output signal is ratiometric to this supply voltage, so supply stability is important for measurement accuracy.

Connect the sensor's V+ and GND pins to a stable 5V power source. The analog output pin (typically Vout) connects directly to an ADC input channel on your microcontroller (e.g., Arduino, STM32). Ensure proper grounding and consider adding a bypass capacitor near the sensor's supply pins for noise reduction.

As a differential pressure sensor, the MPX5999D measures the pressure difference between its two ports (P1 and P2). It can measure positive or negative differential pressure within its 0-1 MPa range, depending on which port has the higher pressure. It is not an absolute pressure sensor.