MPX5100A

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Pressure sensors, transducers, and the MPX5100A can all be used to measure changes in pressure. The MPX5100A has been utilized in fields such as automotive, industrial, and water/desalination plants, among others. Its working principle is based on the piezoresistive effect, wherein an applied pressure causes a small change in the resistance of the silicon diaphragm. This change is proportional to the amount of pressure at the indicated location.

The MPX5100A is capable of measuring absolute pressure in the range of 0-5 V. The maximum range of the device is 15 psig (1.04 bar) and it can be configured for use in a variety of operating conditions. To further increase accuracy and repeatability, compensation is provided for both temperature and thermal stability.

The device works by sensing the change in electronic resistance in a Wheatstone Bridge. This bridge is composed of two fixed and two variable resistors. The varying resistance of the 2 variable resistors changes as the elastic diaphragm deforms, resulting in either a positive or negative change in resistance, depending on the direction of the applied pressure. This change is converted to an electrical signal that is proportional to the pressure being measured.

The MPX5100A incorporates two signal conditioning systems, compensating for thermistor and thermal stability. The first measure is to incorporate an integrated Ratiometric Wheatstone Bridge, which compensates for temperature induced changes. This Ratiometric Bridge uses a low-temperature-coefficient polymer sheet to match the temperature-dependent Wheatston Bridge resistance. With an adjustable supply voltage range of 2.7-5.5 V, the MPX5100A is able to minimize the effect of temperature fluctuations.

The second measure involves thermal stability. Thermal stability is important to ensure accurate measurement as it allows the device to maintain a constant amount of pressure over time. The MPX5100A utilizes a three-layer construction process and an integrated thermal mass to ensure a low thermal coefficient of thermal stability. This ensures that the device is able to maintain the desired level of pressure over time, even with environmental changes.

The MPX5100A is a reliable, accurate, and cost-effective pressure sensing device. Its piezoresistive principle and integrated signal conditioning systems ensure high accuracy readings over temperature fluctuations and thermal stability. Its versatile operating range and three-layer construction make it an ideal choice for a variety of applications, from automotive to industrial.

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