This angular velocity sensor utilizes a Coriolis force that act on a vibrating object when an angular
velocity is applied to it. Murata's unique ceramic bimorph vibrating unit is used as the sensor
element unit, thereby enabling piezoelectric ceramics to be used for both excitation and detection
The use of this unit simplifies equipment structure and circuit configuration, thus making it possible
to provide outstanding performance.
This sensor can be used for positional control and posture control of a moving object requiring
precision and quick-response measurements.
The MMA8450Q is a smart low-power, three-axis, capacitive micromachined
accelerometer featuring 12 bits of resolution. This accelerometer is packed with
embedded functions with flexible user programmable options, configurable to
two interrupt pins. Embedded interrupt functions allow for overall power savings
relieving the host processor from continuously polling data. The MMA8450Q’s
Embedded FIFO buffer can be configured to log up to 32 samples of X,Y and
Z-axis 12-bit (or 8-bit for faster download) data. The FIFO enables a more
efficient analysis of gestures and user programmable algorithms, ensuring no
loss of data on a shared I
2C bus, and enables system level power saving (up to
96% of the total power consumption savings) by allowing the applications
processor to sleep while data is logged. There is access to both low pass
filtered data as well as high pass filtered data, which minimizes the data
analysis required for jolt detection and faster transitions. The MMA8450Q has
user selectable full scales of ±2g/±4g/±8g. The device can be configured to
generate inertial wakeup interrupt signals from any combination of the
configurable embedded functions allowing the MMA8450Q to monitor events
and remain in a low power mode during periods of inactivity.