MLH350BST12E

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Pressure sensors, transducers, and MLH350BST12E are essential components of many applications in various industries. They are used to measure, convert, and monitor pressure within an enclosed system, allowing engineers to measure and control the pressure of a system accurately for optimal performance. This article will discuss the application field and working principle of the MLH350BST12E pressure sensor.

Overview

The MLH350BST12E is a Pressure Sensing Transducer from Mertek\'s pressure sensing product range. It is a MEMS (micro-electro-mechanical) transducer with an easy to use interface and high-accuracy capacitance sensing technology. This pressure transducer measures pressure from -1 bar to 1 bar, with a specified accuracy of 0.2%. It also offers a wide range of supply voltages from 4.5 V to 18 V, as well as various temperature compensation options.

Application Areas

The MLH350BST12E pressure sensor can be used in many different applications. It is suitable for use in the medical, industrial, and automotive industries. In the medical field, it can be used for medical instruments and devices, such as patient monitoring systems, electronic blood pressure monitoring systems, and anesthesia delivery systems. In the industrial field, it can be used in applications such as calibration and test systems, power control systems, and gas delivery systems. In the automotive field, it can be used in engine management systems and airbag control systems. In addition, it can also be used in aerospace applications, such as fuel tank pressure systems.

Working Principle

The MLH350BST12E pressure sensor works on the principle of capacitance sensing. A voltage source is applied to the transducer, which causes the insulation material between two electrodes of the sensor to change its dielectric constant. This change in dielectric constant causes the capacitance of the transducer to change, which in turn is proportional to the pressure. Therefore, the pressure can be calculated from the measured capacitance of the transducer. The capacitance of the MLH350BST12E can be digitized and sent to a microcontroller or FPGA for further computation.

Power Supply

The MLH350BST12E can be powered up by a wide range of supply voltages, from 4.5 V to 18 V. The supply voltage should be carefully paired with the application, since it affects the accuracy and linearity of the transducer. For applications where temperature stability is required, an external temperature compensated voltage reference can be used.

Output Signal

The MLH350BST12E pressure sensor outputs a digital signal that can be converted to an analog signal with an analog-to-digital converter (ADC). The output signal is a 16-bit I²C/SMBus compatible digital output, which is proportional to the applied pressure. The digital output is highly accurate, with a repeatability of 0.2% of full scale range (FSR) over the temperature range of -20°C to 80°C.

Temperature Compensation

The MLH350BST12E pressure transducer offers temperature compensation options to further enhance the accuracy and performance of the measure. With this option, the output of the sensor is electronically compensated for the effects of temperature variations over a range of -20°C to 80°C. This helps to ensure that the output of the sensor remains stable and reliable over a wide range of temperatures.

Package

The MLH350BST12E pressure sensor is available in a 16-lead PDIP (plastic dual in-line) package. This package is designed for easy mounting and secure insulation. It is also compatible with pick-and-place assembly techniques, which allows for automated assembly.

Conclusion

The MLH350BST12E pressure sensor is a reliable and accurate transducer, offering a wide range of applicable scenarios and features to meet the needs of various applications. It is suitable for use in the medical, industrial, and automotive fields, with temperature compensation options for optimal performance. The sensor is packaged in a 16-lead PDIP (plastic dual in-line) package, which is suitable for automated assembly.

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