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

x-IMU3 User Manual v1.7
January 5, 2024

3.3.2 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 34 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 34 for more
information.
3. The accelerometer error is evaluated as the deviation of the measured magnitude of gravity for a 360°
rotation around each axis aligned to the horizontal. The magnitude is calculated as
4. Accuracy is specified for the calibrated temperature only. See Section 4 on page 15 for more information.

3.3.3 Magnetometer

Notes
1. Each sample includes a timestamp for a reliable measurement of time independent of the sample rate
error. See Section 9 on page 34 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 magnetometer error is evaluated as the deviation of the measured magnitude of the ambient
magnetic field for a 360° rotation around each axis aligned to the vertical. The magnitude is calculated
2 2 2
as x + y + z .
4. Accuracy is specified for the calibrated temperature only. See Section 4 on page 15 for more information.
160 g/ Hz (X, Y), 190 g/ Hz (Z)
Table 7: Accelerometer specification
Characteristic
Range ±1300 T (X, Y), ±2500 T (Z)
Sample rate
Noise
Accuracy at 1 a.u.
Table 8: Magnetometer specification
Value
±24 g
16-bit, 732 g
400 Hz ±0.3%
145 Hz
±5 mg
Value
20 Hz ±8%
0.3 T
±50 ma.u.
Notes
-
-
1
2
-
3, 4
2 2
x + y + z
Notes
-
1
-
2, 3, 4
2
.
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