IC-LNG Datasheet, PDF (20/25 Pages) IC-Haus GmbH – 16-BIT OPTO ENCODER WITH SPI AND SERIAL /PARALLEL OUTPUTS

iC-LNG 16-BIT OPTO ENCODER ^preliminary
WITH SPI AND SERIAL / PARALLEL OUTPUTS
OCN
Code
0x00
0x01
...
0x7F
Add. 0x05, bit 6:0
Offset value
0.45 · VDDA
0.4508 · VDDA
(0.45
+
OCN ·0.1
127
)
·
VDDA
0.55 · VDDA
Table 21: NCOS offset
The signal path of the SIN/COS tracks is shown in Fig-
ure 15 with the conditioning unit.
Rev A1, Page 20/25
DPSIN
- ^3Meg
+ ^Vref
+
VPSI
-
GR
Vref
DNSIN
- ^3Meg
+ ^Vref
+
VNSI
-
GR
Vref
GS
-
+
GS
VREFNS
VREFPS
GS
+
-
GS
NSIN
+
VDDA
-
OSN
+
VDDA
-
OSP
PSIN
DPCOS
- ^3Meg
+
+ ^Vref
-
GR
Vref
VPCO
DNCOS
- ^3Meg
+
+ ^Vref
-
GR
Vref
VNCO
GC
-
+
GC
VREFNC
VREFPC
GC
+
-
GC
NCOS
+
VDDA
-
OCN
+
VDDA
-
OCP
PCOS
Figure 15: SIN/COS signal path
SYNCHRONIZATION
iC-LNG synchronizes the digital tracks to the interpo-
lator.
NSYNC can be used to deactivate synchronization to
check the adjustment or for code discs not in Gray
code. The comparated signals of the digital tracks are
then output.
NSYNC
0
1
Add. 0x07, bit 6
Synchronization activated
Synchronization deactivated
Table 22: Synchronization
PARALLEL ENCODER MODE
In parallel encoder mode an absolute position data
word with a width of 14 bits is output in parallel. This
position data word consists of the 11 bits of the digital
tracks and of 3 bits interpolated from the analog track.
The position data is output in Gray code. Parallel en-
coder mode is activated by parameter EPG (see also
Operating Modes on page 14).
EPG
0
1
Add. 0x07, bit 4
Interface mode
Parallel encoder mode
Table 23: Selecting the operating mode