IC-LTA_13 Datasheet, PDF (10/13 Pages) IC-Haus GmbH – 6-CH. INCREMENTAL OPTO ENCODER ARRAY

iC-LTA
preliminary
6-CH. INCREMENTAL OPTO ENCODER ARRAY
DIGITAL OUTPUT SIGNALS
Rev B1, Page 10/13
T
PA
PB
AB-gated
PZ
B-gated
T/4 T/4 T/4 T/4
ö
C
ungated
U
V
W
C/6 C/6 C/6 C/6 C/6 C/6
Figure 1: Typical encoder quadrature and motor
commutation signals.
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.
The pulse count, period length and phase shift for the
U, V, W commutation signals is also determined by the
code disc design.
Contracted code disc designs and IC packaging with
custom reticle can be offered on request; contact iC-
Haus for details.
ANALOG OUTPUT SIGNALS
GND
CA
PA
T1
PB
PZ
VCC
U
SEL
Figure 2: Analog signal output (pin SEL open).
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.
If analog signals are desired permanently, noise immu-
nity can be improved by wiring pin SEL to an external
VCC/2 reference.
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).