NXP Semiconductors MPX5999D Differential Pressure Sensor, 0-1000 kPa Range, 5V Supply, Analog Output

The MPX5999D is designed for a nominal 5V DC supply, with an operational range from 4.75V to 5.25V. It is a ratiometric sensor, meaning its output voltage is proportional to both the applied pressure and the supply voltage, so a stable, regulated 5V source is recommended for accurate measurements.

The sensor's analog voltage output can be connected directly to an analog-to-digital converter (ADC) input on a microcontroller (e.g., Arduino, Raspberry Pi Pico). Ensure your system's ADC reference voltage matches the sensor's output span. For the 5V-powered MPX5999D, using the microcontroller's 5V ADC reference is typical. No additional signal conditioning is strictly required, but an RC filter may be added for noise reduction in electrically noisy environments.

The MPX5999D is specified for a differential pressure range of 0 to 1000 kPa. It measures the pressure difference applied between its two ports (P1 and P2). The output is typically calibrated for a unidirectional range. For bidirectional (positive and negative) differential pressure measurement, you would need a sensor with a range that spans both positive and negative values (e.g., -X kPa to +Y kPa).

An accuracy of ±2.5% Full Scale (F.S.) means the maximum error in the sensor's output, under specified conditions, will not exceed 2.5% of its full measurement range. For a 1000 kPa sensor, this translates to a potential error of up to ±25 kPa. This error includes effects of non-linearity, hysteresis, and repeatability over the compensated temperature range.

While the MPX5999D's sensing element is a silicon MEMS chip, its package and port compatibility determine fluid compatibility. The standard package is typically designed for non-corrosive, dry gases. For direct liquid pressure measurement, you must verify the media compatibility of the sensor's housing and port seals from the official NXP Semiconductors datasheet or consider using an isolating diaphragm seal to protect the sensor from corrosive or conductive liquids.