iC-LNB 18-BIT OPTO ENCODER
WITH SPI AND SER/PAR INTERFACES
Rev A1, Page 24/35
T/2
GA (MSB)
XJD
t
t
0°
180°
Figure 16: EXOR signal at XJD in interface mode
Radial adjustment to code disc sition can be adjusted in a range of about ±150 µm.
The digital tracks’ distance determines the maximum Table 16 illustrates the phase error at a radial offset of
tolerable offset from the radial ideal position. Starting 100 µm.
from an offset of > 100 µm a crosstalk of the nearby
digital track occurs. This can cause an incorrect abso-
lute position.
A radial offset causes amongst others an alteration
in the phase contact between sine/cosine signals.
Thereby with minimizing the phase error the radial po-
Code disc
Phase error
0.65°
LNB1S 42-1024
LNB4S 26-1024
1.6°
Table 16: Phase error at a radial offset of 100 µm
ICHAUS [ IC-HAUS GMBH ]
