Analog Devices ADXL180 iMEMS Manual page 40

ADXL180
Offset Drift Monitoring
Cumulative offset drift is monitored during the normal
operation of the ADXL180. Offset drift monitoring occurs at
the same rate as auto-zero but runs independent of whether
auto-zero is enabled or disabled. An offset error is flagged if the
offset correction exceeds the maximum specified value. The
g-
SENSOR
TRANSMISSION PERIOD
BESSEL 10-BIT
LP FILTER ADC
DIGITAL
FILTER
FAST/SLOW
Figure 30. Auto-Zero Signal Path
appropriate error code is sent in the next data frame transmitted
to the control module (see the Offset Error/Offset Drift
Monitoring section). This message is sent continuously until
power to the ADXL180 is removed. The error status clears on
the next power-on-reset.
AUTO-ZERO DISABLE
SLEW RATE
LP
OVERRANGE DETECT
LIMITER
Rev. 0 | Page 40 of 56
M
TO SERIAL
LIMITER
U
PORT
X
OFFSET
LIMITER ENABLE