Patent ID: 7793544

Claim:
An inertial sensor comprising: a detection structure of a microelectromechanical type, comprising: a first mobile portion configured to be responsive to an in-plane component of acceleration, being the acceleration vector acting in a plane of horizontal extension of said first mobile portion, and to form with at least one first fixed portion facing said first mobile portion at least one in-plane detection capacitor configured to generate an in-plane capacitance variation as a function of said in-plane component of acceleration; a second mobile portion configured to be responsive to an out-of-plane component of acceleration along an orthogonal direction of detection orthogonal to said plane and to form with at least one second fixed portion facing said second mobile portion at least one out-of-plane detection capacitor configured to generate an out-of-plane capacitance variation as a function of said out-of-plane component of acceleration; and an electrical-interconnection portion configured to electrically couple in parallel said in-plane and out-of-plane detection capacitors and to supply at output a total capacitance obtained from a combination of said in-plane and out-of-plane capacitances and correlated to a value of a resultant acceleration acting on said inertial sensor, given by a vector sum of said in plane and out-of-plane components of acceleration.