iC-LTA
6-CH. INCREMENTAL OPTO ENCODER ARRAY
Rev B1, Page 10/13
DIGITAL OUTPUT SIGNALS
T
iC-LTA’s photo-sensor array requires an external reticle
(placed either on side of the IC or on side of the LED),
and thus allows for a free definition of the optical ra-
dius and cycles per revolution for the A and B encoder
quadrature signals.
PA
PB
PZ
AB-gated
ungated
B-gated
T/4
T/4
T/4
T/4
The pulse count, period length and phase shift for the
U, V, W commutation signals is also determined by the
code disc design.
ö
C
U
Contracted code disc designs and IC packaging with
custom reticle can be offered on request; contact iC-
Haus for details.
V
W
C/6
C/6
C/6
C/6
C/6
C/6
Figure 1: Typical encoder quadrature and motor
commutation signals.
ANALOG OUTPUT SIGNALS
GND
CA
T1
PA
PB
PZ
When the operating mode selection input SEL is left
open, all digital outputs are disabled and analog out-
put signals are available for test and alignment.
VCC
If analog signals are desired permanently, noise immu-
nity can be improved by wiring pin SEL to an external
VCC/2 reference.
U
SEL
Figure 2: Analog signal output (pin SEL open).
INDEX GATING
VCC
T
GND
CA
T1
PA
PB
PZ
T/4
T/4
T/4
T/4
SEL
Figure 3: Ungated index signal (T1 = high) at x1 interpolation (SEL = low).
ICHAUS [ IC-HAUS GMBH ]
