ADIS16480 AD [Analog Devices], ADIS16480 Datasheet - Page 30

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

ADIS16480
CALIBRATION
The
for the gyroscopes, accelerometers, magnetometers, and
barometers, and then programs them into the flash memory.
In addition, there are a series of user configurable calibration
registers, for in-system tuning.
GYROSCOPES
The use calibration for the gyroscopes includes registers for
adjusting bias and sensitivity, as shown in Figure 23.
Manual Bias Correction
The xG_BIAS_HIGH registers (see Table 97, Table 98, and
Table 99) and xG_BIAS_LOW registers (see Table 100,
Table 101, and Table 102) provide a bias adjustment function
for the output of each gyroscope sensor.
Table 97. XG_BIAS_HIGH (Page 2, Base Address = 0x12)
Bits
[15:0]
Table 98. YG_BIAS_HIGH (Page 2, Base Address = 0x16)
Bits
[15:0]
Table 99. ZG_BIAS_HIGH (Page 2, Base Address = 0x1A)
Bits
[15:0]
Table 100. XG_BIAS_LOW (Page 2, Base Address = 0x10)
Bits
[15:0]
Table 101. YG_BIAS_LOW (Page 2, Base Address = 0x14)
Bits
[15:0]
Table 102. ZG_BIAS_LOW (Page 2, Base Address = 0x18)
Bits
[15:0]
X-AXIS
GYRO
ADIS16480
CALIBRATION
Figure 23. User Calibration Signal Path, Gyroscopes
Description (Default = 0x0000)
X-axis gyroscope offset correction, upper word
twos complement, 0°/sec = 0x0000, 1 LSB = 0.02°/sec
Description (Default = 0x0000)
Y-axis gyroscope offset correction, upper word;
twos complement, 0°/sec = 0x0000, 1 LSB = 0.02°/sec
Description (Default = 0x0000)
Z-axis gyroscope offset correction, upper word;
twos complement, 0°/sec = 0x0000, 1 LSB = 0.02°/sec
Description (Default = 0x0000)
X-axis gyroscope offset correction, lower word;
twos complement, 0°/sec = 0x0000,
1 LSB = 0.02°/sec ÷ 2
Description (Default = 0x0000)
Y-axis gyroscope offset correction, lower word;
twos complement, 0°/sec = 0x0000,
1 LSB = 0.02°/sec ÷ 2
Description (Default = 0x0000)
Z-axis gyroscope offset correction, lower word
twos complement, 0°/sec = 0x0000,
1 LSB = 0.02°/sec ÷ 2
FILTERING
FACTORY
AND
XG_BIAS_HIGH
factory calibration produces correction formulas
1 + X_GYRO_SCALE
XG_BIAS_LOW
16
16
16
= ~0.000000305°/sec
= ~0.000000305°/sec
= ~0.000000305°/sec
X_GYRO_OUT
X_GYRO_LOW
Rev. 0 | Page 30 of 40
Manual Sensitivity Correction
The x_GYRO_SCALE registers enable sensitivity adjustment
(see Table 103, Table 104, and Table 105).
Table 103. X_GYRO_SCALE (Page 2, Base Address = 0x04)
Bits
[15:0]
Table 104. Y_GYRO_SCALE (Page 2, Base Address = 0x06)
Bits
[15:0]
Table 105. Z_GYRO_SCALE (Page 2, Base Address = 0x08)
Bits
[15:0]
Linear Acceleration on Effect on Gyroscope Bias
MEMS gyroscopes typically have a bias response to linear
acceleration that is normal to their axis of rotation. The
offers an optional compensation function for this effect. Turn to
Page 3 (DIN = 0x8003) and set CONFIG[7] = 1 (DIN = 0x9080,
DIN = 0x9100). The factory default setting for this function is
enabled.
Table 106. CONFIG (Page 3, Base Address = 0x0A)
Bits
[15:8]
7
6
[5:2]
1
0
Description (Default = 0x00C0)
Not used
Linear-g compensation for gyroscopes (1 = enabled)
Point of percussion alignment (1 = enabled)
Not used
Real-time clock, daylight savings time
(1: enabled, 0: disabled)
Real-time clock control
(1: relative/elapsed timer mode, 0: calendar mode)
Description (Default = 0x0000)
X-axis gyroscope scale correction; twos complement,
0x0000 = unity gain, 1 LSB = 1 ÷ 2
Description (Default = 0x0000)
Y-axis gyroscope scale correction; twos complement,
0x0000 = unity gain, 1 LSB = 1 ÷ 2
Description (Default = 0x0000)
Z-axis gyroscope scale correction; twos complement,
0x0000 = unity gain, 1 LSB = 1 ÷ 2
15
15
15
= ~0.003052%
= ~0.003052%
= ~0.003052%
Data Sheet
ADIS16480