MLX90609 Datasheet, PDF (21/22 Pages) List of Unclassifed Manufacturers – Angular Rate Sensor (Standard version)

MLX90609
Angular Rate Sensor (Standard version)
Primary and Secondary Frame
In vector notation the Coriolis force F_Coriolis is given by:
( ) F_Coriolis = 2m v × Ω
Where m is the mass of the object, v its velocity and Ω is the angular rate of the rotating coordinate
system.
To create a Coriolis Force (F_Coriolis), a movement or velocity (v) must be induced. The gyroscope
system has got an electrically actuated oscillating mechanical structure, called primary frame (m).
When the gyroscope rotates (Ω) a Coriolis force F_Coriolis acts on this frame. To measure the Coriolis
force, a part of the frame - called the secondary frame - is designed to allow a motion as a reaction
to the applied Coriolis force. This synchronous motion is sensed electrically by a capacitive readout
circuit.
The gyroscope is a vibratory system with two orthogonal vibrating frames: the primary actuated
vibrating frame and the secondary sensed vibrating frame.
Zero Rate Output (ZRO) Drift
The bounds within which the circuit output signal may vary as the temperature varies across the
operating temperature range with no applied angular rate.
List of Acronyms
ADC
EEPROM
EMC
ESD
HBM
JEDEC
MEMS
SMD
SO
SPI
TC
CDF-AEC-100
Analog to Digital Converter
Electrically Erasable PROM
Electro Magnetic Compatibility
Electrostatic Discharge
Human Body Model of ESD
Joint Electronics Design Engineering Council
Micro Electro-Mechanical Sensor
Surface Mounted Device
Swiss Outline or Small Outline
Serial Peripheral Interface
Temperature Coefficient
Automotive Electronics Council –
Stress Test Qualification for Integrated Circuits
390109060901
Rev 007
Page 21 of 22
Data Sheet
January/08