Accelerometer; Magnetometer - X-IO x-IMU3 User Manual

x-IMU3 User Manual v0.11
April 6, 2022
Notes
1. Each sample includes a timestamp for a reliable measurement of time independent of the sample rate
error. See Section 9 on page 31 for more information.
2. The maximum bandwidth is achieved when the message rate is equal to the sample rate. If the message
rate is less than the sample rate then samples are averaged. See Section 9 on page 31 for more
information.

3.2.2 Accelerometer

Characteristic
Range
Resolution
Sample rate
Bandwidth
Noise
Accuracy at 1 g
Notes
1. Each sample includes a timestamp for a reliable measurement of time independent of the sample rate
error. See Section 9 on page 31 for more information.
2. The maximum bandwidth is achieved when the message rate is equal to the sample rate. If the message
rate is less than the sample rate then samples are averaged. See Section 9 on page 31 for more
information.
3. The accuracy at 1 g is evaluated as the deviation of the measured magnitude of gravity for a 360°
rotation around the X, Y, and Z axis aligned to the horizontal axis.
4. Accuracy is specified for the calibrated temperature only. See Section 4 on page 12 for more information.

3.2.3 Magnetometer

Characteristic
Range
Sample rate
Noise
Accuracy at 1 a.u.
Notes
1. Each sample includes a timestamp for a reliable measurement of time independent of the sample rate
error. See Section 9 on page 31 for more information.
2. The calibrated magnetometer units are arbitrary units (a.u.). 1 a.u. is equal to the magnitude of the
ambient magnetic field during calibration, approximately 50 T.
3. The accuracy at 1 a.u. is evaluated as the deviation of the measured magnitude of the ambient magnetic
field for a 360° rotation around the X, Y, and Z axis aligned to the vertical axis.
4. Accuracy is specified for the calibrated temperature only. See Section 4 on page 12 for more information.
Value
±24 g
16-bit, 732 g
400 Hz ±0.3%
145 Hz
160 g/ Hz (X, Y), 190 g/ Hz (Z)
TBC
Table 4: Accelerometer specification
Value
±1300 T (X, Y), ±2500 T (Z)
20 Hz ±8%
0.3 T
TBC
Table 5: Magnetometer specification
Notes
-
-
1
2
-
3, 4
Notes
-
1
-
2, 3, 4
10