KITMPXSHOWEVK: Pressure Sensor Functional Package Board

What is the term Media Compatibility, and how does it affect Pressure Sensors? Media is any chemical compound, in liquid, solid or gas which interacts with the sensor where the sensing of pressure is done either directly through this chemical, or by measuring the pressure of a gas containing a certain amount of this chemical. Media Compatibility is presented here as the various media that our sensor can sense pressure with, either directly or through an air column. While this document will lay groundwork fo

Introduction PSPICE models for Uncompensated, MPX2000 series, and MPX5000 series pressure sensors are presented here. These models use compound coefficients to improve modeling of temperature dependent behavior. The discussion begins with an overview of how the models are structured, and is followed by an explanation of compound coefficients. The emphasis is on how to use these models to estimate sensor performance. They can be found electronically on a disk included in ASB200 Sensor Development Controller

Smaller package outlines and higher board densities require the need for automated placement of components. These components are supplied in embossed carrier tape on plastic reels to meet the increased demand and facilitate ease of handling. This application note is intended to provide general information and understanding for handling Motorola's surface mount pressure sensors.

The most popular silicon pressure sensors are piezoresistive bridges that produce a differential output voltage in response o pressure applied to a thin silicon diaphragm. Output voltage for these sensors is generally 25 to 50 mV full scale.

A digital output is more desirable than an analog output in noisy environments (e.g., automotive, washing machines, etc.) and remote sensing applications (building controls, industrial applications, etc.) because a digital signal inherently has better noise immunity compared to analog signals. Additional applications requiring a sensor with a digital output include microcontroller-based systems that have no A/D in the system or that have no A/D channels available for the sensing function. For these applica

AN3150: Pressure sensor devices require the internal cavity containing the silicon transducer to be exposed to ambient in order for the device to function. Exposed cavity packages require special considerations during board assembly to prevent damage to the device during soldering and subsequent cleaning operations.

AN3956: The DEMOAPEXSENSOR is an experimental sensor board focused on pressure with a variety of applications built into the demo. These include: Altimeter, Barometer, Barometer Alarm, Weather station, Waterlevel, Waterlevel Alarm, Tilt, Freefall, and Temperature Sensing. The board has been designed as a standalone board to be interfaced currently via an LCD display and menu buttons.

Bar Graph displays are noted for their ability to very quickly convey a relative sense of how much of something is present.They are particularly useful in process monitoring applications where quick communication of a relative value is more important than providing specific data.

The Integrated Pressure Sensors (IPS) have trimmed outputs, built-in temperature compensation and an amplified single-ended output which make them compatible with Analog to Digital converters (A/Ds) on low cost micro-controllers. Although 8-bit A/Ds are most common, higher resolution A/Ds are becoming increasingly available. With these higher resolution A/Ds, the noise that is inherent to piezo-resistive bridges becomes a design consideration.

Overview Over the past 25 years, NXP Semiconductors Sensor Products Division has supplied the world with more than 650 million micro-electromechanical systems (MEMS)-based sensors.