Evaluation Board User Guide
UG-154
Rev. 0 | Page 13 of 16
TURN-ON BIAS SETTLING PANEL
09113-
022
Figure 22. 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. The recommended
turn-on time for the ADXRS800 is 100 ms (typical), and it is
not recommended that your applications try to obtain accurate
rate data from the device within this period. However, if it is not
possible to control the communications timings such that the
application does not communicate with the device before 100 ms
expires, this panel allows you to observe the turn-on behavior of
the ADXRS800 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 22)
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
comes first.
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