IC-MHM Datasheet, PDF (20/63 Pages) IC-Haus GmbH – 14-BIT ABSOLUTE ANGLE HALL ENCODER

iC-MHM
14-BIT ABSOLUTE ANGLE HALL ENCODER
Rev D1, Page 20/63
Figure 14 shows how harmonic calibration operates.
The blue signal (top) shows the typical residual angular
error of the iC-MHM after offsets and gain have been
calibrated. The purple signal (middle) is the HARMCAL
(compensation) signal. These two signals are added
together to reduce the 4th harmonic angular error, as
shown by the green signal (bottom). Refer to CALIBRA-
TION on page 54 for information on tuning the harmonic
calibration.
0.4
0.2
0.0
± 0.35°
-0.2
-0.4
0
90
180
270
360
angular position [degree]
0.2
0.0
-0.2
0.4
0.2
0.0
± 0.2 °
-0.2
-0.4
0
90
180
270
360
angular position [degree]
Figure 14: Harmonic Calibration