Datasheet Analog Devices ADIS16448 — 数据表

Compact, Precision
Ten Degrees of Freedom Inertial Sensor
ADIS16448 Data Sheet
FEATURES GENERAL DESCRIPTION Triaxial digital gyroscope with digital range scaling
±250°/sec, ±500°/sec, ±1000°/sec settings
Axis-to-axis alignment, 0x04. New Data Indicators
DIAG_STAT[7] (see Table 31) offers a new data bit for the
magnetometer (xMAGN_OUT) and barometer output registers
(BARO_OUT) registers. This bit rises to a 1, right after the
xMAGN_OUT and BARO_OUT registers receive fresh data.
It returns to 0 after one of the four registers experiences a read
request. a value of 16 and decrements every time the gyroscope data
updates. When it reaches a value of 1, it returns to a value
16 after the next gyroscope update cycle. When SEQ_CNT
equals 16, the magnetometer (xMAGN_OUT) and barometer
(BARO_OUT) registers contain new data. The SEQ_CNT
register can be useful during initialization to help synchronize
read loops for new data in both magnetometer and barometer
outputs. When beginning a continuous read loop, read SEQ_CNT
to determine the number of sample cycles that must pass, before
the magnetometer and barometer registers update.
Table 36. SEQ_CNT (Base Address = 0x3A), Read Only
Bits …

Silicon Anomaly Compact, Precision
Ten Degrees of Freedom Inertial Sensor
ADIS16448 This anomaly list describes the known bugs, anomalies, and workarounds for the ADIS16448.
Analog Devices, Inc., is committed, through future silicon revisions, to continuously improve silicon functionality. Analog Devices tries
to ensure that these future silicon revisions remain compatible with your present software/systems by implementing the recommended
workarounds outlined within this document. PERFORMANCE ISSUES
Table 1. TEMP_OUT Locks Up When Entering External Sampling Clock Mode [er001]
Background
Issue
Workaround
Related Issues The ADIS16448 provides two options for driving the sampling of gyroscope, accelerometer, and temperature data:
internal and external. Users can select the mode by writing either 0 (external sampling clock mode) or 1 (internal
sampling clock mode) to SMPL_PRD[0].
When entering external sampling clock mode (writing 0x00 to SMPL_PRD[7:0]), the internal temperature measurement
can lock up and fail to track changes in temperature, which in turn locks up the data in the TEMP_OUT register and can
cause the bias error in both gyroscopes and accelerometers to increase.
If the application requires use of the external clock, read the LOT_ID1[7:0] bits. If LOT_ID1[7:0] ≥ 0x22, this issue does not
apply. If LOT_ID1[7:0] < 0x22 and external clock support is a requirement, replace the unit.
None. ANOMALY STATUS
Reference Number
er001 Rev. 0 Description
TEMP_OUT Locks Up When Entering External Sampling Clock Mode Status
Fixed Date Code …