MPX2202ASX

Pressure Sensors, Transducers

Pressure sensors and transducers are usually used to measure the pressure of liquids or gases that are either static or dynamic. These devices are widely used in a wide range of industries, including medical, automotive, aerospace, and marine applications. In this article, the MPX2202ASX application field and working principle will be discussed.

Application Field

The MPX2202ASX is a pressure sensor made by Texas Instruments. It is a piezoresistive transducer designed for application in automotive, industrial, and medical systems. This device is able to accurately measure the pressure of both gases and liquids. It is suitable for non-corrosive and non-aggressive liquids and gases, and can also be used to measure differential pressures. It operates over a pressure range of 0 to 25MPa and has an accuracy of 0.5%. It features a low power supply voltage of 4.5V, a low total error band of ±1.0%, and a long term stability of ±0.5% FS/yr. The temperature range of the MPX2202AXS is –20°C to 85°C.

Working Principle

The MPX2202ASX is a piezoresistive transducer. This means that it is able to measure pressure by using a change in resistance due to a change in the size of a piezoresistor. A piezoresistor is a semiconductor which can be used to detect a change in physical or mechanical pressure. When subjected to a force, the piezoresistor will be deformed, causing a resistance change, which can be measured. The MPX2202ASX utilizes four piezoresistors arranged in a Wheatstone bridge configuration, in order to measure the force exerted by the applied pressure. This bridge connects two voltage outputs and two resistance outputs. The bridge output voltage represents the differential pressure while the bridge output resistance represents the static pressure. The outputs of the bridge are amplified before being sent to the microcontroller for processing.

Conclusion

The MPX2202ASX is an excellent pressure transducer which is suitable for a wide range of applications, including automotive, medical, and industrial systems. It is accurate up to 0.5% and has a long term stability of ±0.5% FS/year. Its automotive applications include brake system overpressure, fuel tank pressure, and other automotive-related pressure measurements. Its medical applications include respiratory systems, cardiovascular systems, and diabetes monitoring. The MPX2202ASX is also suitable for industrial measurements, including gas supply pressure, air conditioner pressure, and refrigeration pressure.