KITMPL115A1EVB

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KITMPL115A1EVB Application Field and Working Principle

The KITMPL115A1EVB is a type of evaluation board designed to enable users to evaluate the operation and features of Freescale’s Semiconductor’s MPL115A1 digital barometer. The board is able to simulate pressure measurements in wide range of pressure environments from 100 hPa to 115 hPa and is a versatile solution suitable for labs, industrial and commercial applications.

The Application Fields

The KITMPL115A1EVB is suitable for a variety of application fields. The applicable fields cover from medical, automotive, navigation, portable consumer and industrial devices.

In medical device, the digital barometer has a wide range of applications and was tested for performance in medical respiratory systems. The barometer provides the sensor signals for overall breath analysis, air pressure recording, recognition of breathing patterns and oxygen concentration. Also, mounted on-board oxygen content or humidity sensor can provide a valuable addition to the respiratory system performance.

In the automotive industry, the barometer can be utilized for driving assistance, such as monitoring the air pressure in the cabin, providing differential signals for airbags or monitoring air quality for better engine performances. Furthermore, the air quality monitoring allows for better decision making in vehicle maintenance as well as providing consumer information about the environment quality along the route.

The digital barometer can also be used for navigation systems to provide real-time data about the environmental pressure, giving increased accuracy for navigation data. This is especially beneficial for navigation algorithms like GPS and VHF systems.

Within the portable consumer industry, the digital barometer can be used to measure air pressure for altitude measurement activities. Combined with an accelerometer, the board can provide detailed altitude data for hiking, climbers and sports activities. Moreover, the board is small and lightweight, which makes it suitable for portable consumer applications.

On the industrial side, the barometer can be used to measure pressure readings to ensure the safety and security of manufacturing and industrial plant operation. With a range from 100 hPa to 115 hPa, the KITMPL115A1EVB digital barometer can be utilized in applications such as pipeline leak detection, air tightness testing, environmental safety testing and pressure testing in mechanical systems.

Working Principle

The KITMPL115A1EVB digital barometer is based on the MPL115A1 sensor, a low-cost, low power, high accuracy, monolithic pressure sensor. The barometer uses a MEMS capacitive pressure sensor and the signal is conditioned by an on-board analog IC. The board also features a 3.3V voltage regulator, an analog to digital converter and a USB interface.

The board has two operating modes: Polling and Interrupt. The Polling mode is active when the board is connected to a USB host and the board continuously samples the pressure, providing a data stream to the receiver and plotted in a graph. The Interrupt mode is primarily used as an event-triggered mode, in which the barometer sends out a signal to the USB host based upon a set pressure threshold.

KITMPL115A1EVB also has high accuracy even when used in an OEM system. The error range is within ±0.5 hPa or ±2.5%. Additionally, it has a temperature coefficient of 0.5%/°C. The barometer offers stable operation up to 3.6V while drawing a power of 400μA from a 3V battery.

The KITMPL115A1EVB evaluation board is an ideal solution for industrial and commercial pressure sensing applications. It offers a wide range of pressure environments and abilities, as well as two programmable operating modes. Overall, the board is capable of providing accurate and reliable pressure readings to the essential environmental safety and security.

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