UG-260
Evaluation Board User Guide
Rev. 0 | Page 14 of 20
TURN-ON BIAS SETTLING PANEL
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Figure 23. Turn-On Bias Settling
In addition to the bias stability from one power cycle to the
next, it is important to understand the device behavior at the
moment power is applied to the device. It is recommended that
you wait a turn-on time of 100 ms (typical) before attempting to
obtain accurate rate data. However, for cases where it is not
possible to control the communications timings to comply with
this recommendation, this panel enables observation of the
turn-on behavior of the ADXRS450/ADXRS453 for
incorporation into your system’s algorithms. For this test panel,
the first SPI message is typically received from the device within
20 ms after the ISEB supplies power to the satellite board.
Additionally, if the device is rotated at a constant rate while
power is applied, the
Turn-on Bias Settling
panel (see Figure 23)
verifies that the conditions defined for the turn-on time are
achieved; that is, after 100 ms (typical), the device output is
within 1% or ½°/sec of the applied rotational rate, whichever is
higher.
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