The most recent advances in silicon micromachining technology have given rise to a variety of low–cost pressure sensor applications and solutions. Certain applications had previously been hindered by the high–cost, large size, and
overall reliability limitations of electromechanical pressure sensing devices. Furthermore, the integration of on–chip temperature compensation and calibration has allowed a significant improvement in the accuracy and temperature stability of the sensor output signal. This technology allows for
the development of both analog and microcomputer–based systems that can accurately resolve the small pressure changes encountered in many applications. One particular application of interest is the combination of a silicon pressure
sensor and a microcontroller interface in the design of a digital barometer. The focus of the following documentation is to present a low–cost, simple approach to designing a digital barometer system.