ADIS16480 AD [Analog Devices], ADIS16480 Datasheet - Page 17

• Manufacturer Part Number: ADIS16480
• Description: Ten Degrees of Freedom Inertial Sensor
• Manufacturer: AD [Analog Devices]

Data Sheet
ACCELERATION
The registers that use the x_ACCL_OUT format are the primary
registers for the accelerometer measurements (see Table 17,
Table 18, and Table 19). When processing data from these
registers, use a 16-bit, twos complement data format. Table 20
provides x_ACCL_OUT digital coding examples.
Table 17. X_ACCL_OUT (Page 0, Base Address = 0x1E)
Bits
[15:0]
Table 18. Y_ACCL_OUT (Page 0, Base Address = 0x22)
Bits
[15:0]
Table 19. Z_ACCL_OUT (Page 0, Base Address = 0x26)
Bits
[15:0]
Table 20. x_ACCL_OUT Data Format Examples
Acceleration
+10 g
+1.6 mg
+0.8 mg
0 mg
−0.8 mg
−1.6 mg
−10 g
The MSB in x_ACCL_LOW has a weight of 0.4 mg, and each
subsequent bit has ½ the weight of the previous one.
Table 21. X_ACCL_LOW (Page 0, Base Address = 0x1C)
Bits
[15:0]
Table 22. Y_ACCL_LOW (Page 0, Base Address = 0x20)
Bits
[15:0]
Table 23. Z_ACCL_LOW (Page 0, Base Address = 0x24)
Bits
[15:0]
Description
X-axis accelerometer data; twos complement,
±10 g range, 0 g = 0x0000, 1 LSB = 0.8 mg
Description
Y-axis accelerometer data; twos complement,
±10 g range, 0 g = 0x0000, 1 LSB = 0.8 mg
Description
Z-axis accelerometer data; twos complement,
±10 g range, 0 g = 0x0000, 1 LSB = 0.8 mg
Description
X-axis accelerometer data; additional resolution bits
Description
Y-axis accelerometer data; additional resolution bits
Description
Z-axis accelerometer data; additional resolution bits
Decimal
+12,500
+2
+1
0
−1
−2
−12,500
Hex
0x30D4
0x0002
0x0001
0x0000
0xFFFF
0xFFFE
0xCF2C
Binary
0011 0000 1101 0100
0000 0000 0000 0010
0000 0000 0000 0001
0000 0000 0000 0000
1111 1111 1111 1111
1111 1111 1111 1110
1100 1111 0010 1100
Rev. 0 | Page 17 of 40
DELTA ANGLES
The delta angle outputs represent an integration of the gyro-
scope measurements and use the following formula for all
three axes (x-axis displayed):
where:
ω
Δt
When using the internal sample clock, f
When using the external clock option, the time between samples
is the time between active edges on the input clock signal, as
measured by the internal clock (252 MHz). See Table 67 for
more information on the DEC_RATE register. The registers
that use the x_DELTANG_OUT format are the primary
registers for the delta angle calculations. When processing
data from these registers, use a 16-bit, twos complement
data format (see Table 24, Table 25, and Table 26). Table 27
provides x_DELTANG_OUT digital coding examples.
Table 24. X_DELTANG_OUT (Page 0, Base Address = 0x42)
Bits
[15:0]
Table 25. Y_DELTANG_OUT (Page 0, Base Address = 0x46)
Bits
[15:0]
Table 26. Z_DELTANG_OUT (Page 0, Base Address = 0x4A)
Bits
[15:0]
Table 27. x_DELTANG_OUT Data Format Examples
Angle (°)
+720 × (2
+1440/2
+720/2
0
−720/2
−1440/2
−720
x
S
is the gyroscope, x-axis.
is the time between samples.
∆
θ
15
15
x
15
15
Description
X-axis delta angle data; twos complement,
±720° range, 0° = 0x0000, 1 LSB = 720°/2
Description
Y-axis delta angle data; twos complement,
±720° range, 0° = 0x0000, 1 LSB = 720°/2
Description
Z-axis delta angle data; twos complement,
±720° range, 0° = 0x0000, 1 LSB = 720°/2
15
=
− 1)/2
∆
2
t
S
×
15
(
ω
x
,
n
Decimal
+32,767
+2
+1
0
−1
−2
−32,768
+
1
+
ω
x
,
n
)
;
∆
Hex
0x7FFF
0x0002
0x0001
0x0000
0xFFFF
0xFFFE
0x8000
t
S
=
DEC
S
is equal to 2.46 kHz.
Binary
0111 1111 1111 1111
0000 0000 0000 0010
0000 0000 0000 0001
0000 0000 0000 0000
1111 1111 1111 1111
1111 1111 1111 1110
1000 0000 0000 0000
_
RATE
f
S
ADIS16480
15
15
15
= ~0.022°
= ~0.022°
= ~0.022°
+
1