Abstract
Systems in Package (SiP) contain more and more MEMS components such as resonators for time references or RF filtering. These resonators are packaged at wafer level and the cavity quality has to be guaranteed in terms of pressure and humidity level by the final manufacturing test. Therefore, environmental sensors could be integrated in the cavity to control these parameters and/or to calibrate the MEMS resonator with an electronic loopback. This paper presents the design of a low-cost pressure sensor for such application.