I3G4250D Datasheet, PDF (15/43 Pages) STMicroelectronics – 3-axis digital output gyroscope

I3G4250D
Mechanical and electrical characteristics
2.6
2.6.1
2.6.2
2.6.3
Terminology
Sensitivity
An angular rate gyroscope is a device that produces a positive-going digital output for
counter-clockwise rotation around the axis considered. Sensitivity describes the gain of the
sensor and can be determined by applying a defined angular velocity to it. This value
changes very little over temperature and time.
Zero-rate level
The zero-rate level describes the actual output signal if there is no angular rate present. The
zero-rate level of precise MEMS sensors is, to some extent, a result of stress to the sensor
and, therefore, the zero-rate level can slightly change after mounting the sensor onto a
printed circuit board or after exposing it to extensive mechanical stress. This value changes
very little over temperature and time.
Stability over temperature and time
Thanks to the unique single-driving mass approach and optimized design, ST gyroscopes
are able to guarantee a perfect match of the MEMS mechanical mass and the ASIC
interface, and deliver unprecedented levels of stability over temperature and time.
With the zero-rate level and sensitivity performance, up to ten times better than equivalent
products currently available on the market, the I3G4250D allows the user to avoid any
further compensation and calibration during production for a faster time-to-market, easy
implementation in applications, higher performance, and cost saving.
2.7
Soldering information
The LGA package is compliant with the ECOPACK^®, RoHS and “Green” standard.
It is qualified for soldering heat resistance according to JEDEC J-STD-020.
Leave “pin 1 indicator” unconnected during soldering.
Land pattern and soldering recommendations are available at www.st.com/.
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