MLX90609
Angular Rate Sensor (Standard version)
390109060901
Page 20 of 22
Data Sheet
Rev 007
January/08
Figure 9-3. MLX90609 Bottom View
Figure 9-4. Land Pattern Design (top view)
10. Glossary of Terms
Angular Rate Sensor
A sensor that measures rotational velocity measured in degrees per second around its sensitive
axis. Angular rate sensors are sometimes referred to as gyro or gyroscope.
Bandwidth
The input signal frequency range from DC (zero frequency) up to the frequency where a -3dB
amplitude decay (between mechanical input and rate output) is observed. In the case of the
present device, the bandwidth is user selectable by means of an external capacitor.
Coriolis Effect
Coriolis Effect is an inertial force described by the 19th-century engineer-mathematician Gustave-
Gaspard Coriolis in 1835. Coriolis showed that, if the ordinary Newtonian laws of motion of bodies
are to be used in a rotating frame of reference, an inertial force, acting to the right of the direction of
body motion for counterclockwise rotation of the reference frame or to the left for clockwise rotation,
must be included in the motion equations.
In effect, the Coriolis force is an apparent deflection of the path of an object that moves within a
rotating coordinate system. The object does not actually deviate from its path, but it appears to do
so because of the motion of the coordinate system.
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