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ADIS16489 Datasheet(PDF) 17 Page - Analog Devices

Part # ADIS16489
Description  Seven Degrees of Freedom Inertial Sensor
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADIS16489 Datasheet(HTML) 17 Page - Analog Devices

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Data Sheet
ADIS16489
Rev. B | Page 17 of 40
Table 18. DIAG_STS Bit Definitions
Bits
Description
[15:12]
Not used
11
Self test failure, barometer (1 = failure)
[10:6]
Not used
5
ODST failure, z-axis accelerometer (1 = failure)
4
ODST failure, y-axis accelerometer (1 = failure)
3
ODST failure, x-axis accelerometer (1 = failure)
2
ODST failure, z-axis gyroscope (1 = failure)
1
ODST failure, y-axis gyroscope (1 = failure)
0
Self test failure, x-axis gyroscope (1 = failure)
SYS_E_FLAG[5] (see Table 16) contains the pass and fail result
(0 = pass) for on demand self test (ODST) operations, whereas
the DIAG_STS register (see Table 17 and Table 18) contains
pass and fail flags (0 = pass) for each inertial sensor. Reading
the DIAG_STS register causes all of its bits to restore to 0. The
bits in DIAG_STS return to 1 if the error conditions persists.
ALARM ERROR FLAGS (ALM_STS)
Table 19. ALM_STS Register Definition
Page
Addresses
Default
Access
Flash Backup
0x00
0x0C, 0x0D
0x0000
R
No
Table 20. ALM_STS Bit Definitions
Bits
Description
[15:12]
Not used
11
Barometer alarm flag (1 = alarm is active)
[10:6]
Not used
5
Z-axis accelerometer alarm flag (1 = alarm is active)
4
Y-axis accelerometer alarm flag (1 = alarm is active)
3
X-axis accelerometer alarm flag (1 = alarm is active)
2
Z-axis gyroscope alarm flag (1 = alarm is active)
1
Y-axis gyroscope alarm flag (1 = alarm is active)
0
X-axis gyroscope alarm flag (1 = alarm is active)
The ALM_STS register (see Table 19 and Table 20) contains the
error flags for the alarm settings in the ALM_CNFG_0 (see
Table 170) and ALM_CNFG_1 (see Table 172) registers.
Reading the ALM_STS register causes all bits to restore to 0. If
the alarm condition is persistent, its bit restores to a 1 in the
next sample cycle.
INTERNAL TEMPERATURE (TEMP_OUT)
Table 21. TEMP_OUT Register Definition
Page
Addresses
Default
Access
Flash Backup
0x00
0x0E, 0x0F
Not applicable
R
No
Table 22. TEMP_OUT Bit Definitions
Bits
Description
[15:0]
Temperature data; twos complement, 0.00565°C per LSB,
25°C = 0x0000
The TEMP_OUT register (see Table 21 and Table 22) provides
a coarse measurement of the temperature inside of the
ADIS16489. This data is most useful for monitoring relative
changes that influence the temperature inside of the ADIS16489.
Table 23. TEMP_OUT Data Format Examples
Temperature (°C)
Decimal
Hex
Binary
+85
+10,619
0x297B
0010 1001 0111 1011
+25 + 0.0113
+2
0x0002
0000 0000 0000 0010
+25 + 0.00565
+1
0x0001
0000 0000 0000 0001
+25
0
0x0000
0000 0000 0000 0000
+25 − 0.00565
−1
0xFFFF
1111 1111 1111 1111
+25 − 0.0113
−2
0xFFFE
1111 1111 1111 1110
−40
−11,504
0xD310
1101 0011 0001 0000
GYROSCOPE DATA
The gyroscopes in the ADIS16489 measure the angular rate of
rotation around three orthogonal axes (x, y, and z). Figure 18
illustrates the orientation of each gyroscope axis, along with the
direction of rotation that produces a positive response in each
of their measurements.
PIN 1
PIN 23
ωY
Y-AXIS
ωX
X-AXIS
Z-AXIS
ωZ
Figure 18. Gyroscope Axis and Polarity Assignments
Each gyroscope has two output data registers. Figure 19
illustrates how these two registers combine to support a 32-bit,
twos complement data format for the x-axis gyroscope measure-
ments. This format also applies to the y- and z-axes as well.
X-AXIS GYROSCOPE DATA
0 15
15
0
X_GYRO_OUT
X_GYRO_LOW
Figure 19. Gyroscope Output Data Structure
X-Axis Gyroscope (X_GYRO_LOW, X_GYRO_OUT)
Table 24. X_GYRO_LOW Register Definition
Page
Addresses
Default
Access
Flash Backup
0x00
0x10, 0x11
Not applicable
R
No
Table 25. X_GYRO_LOW Bit Definitions
Bits
Description
[15:0]
X-axis gyroscope data; low word
Table 26. X_GYRO_OUT Register Definition
Page
Addresses
Default
Access
Flash Backup
0x00
0x12, 0x13
Not applicable
R
No


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