HCPL-0710 Datasheet, PDF (14/16 Pages) Agilent(Hewlett-Packard) – 40 ns Prop. Delay, SO-8 Optocoupler

Power Supplies and Bypassing
The recommended DeviceNet
application circuit is shown in
Figure 21. Since the HCPL-0710
is fully compatible with CMOS
logic level signals, the optocoup-
ler is connected directly to the
CAN transceiver. Two bypass
capacitors (with values between
0.01 and 0.1 µF) are required and
should be located as close as
possible to the input and output
power-supply pins of the HCPL-
0710. For each capacitor, the
total lead length between both
ends of the capacitor and the
power supply pins should not
exceed 20 mm. The bypass capac-
itors are required because of the
high-speed digital nature of the
signals inside the optocoupler.
ISO 5 V
GALVANIC
ISOLATION
BOUNDARY
TX0
0.01 µF
1 V_DD1
V_DD2 8
2 V_IN
7
HCPL-0710
3
V_O 6
4 GND₁
GND₂ 5
GND
RX0
0.01 µF
5 GND₂
GND₁ 4
6 V_O
3
HCPL-0710
7
V_IN 2
0.01
µF
0.01
µF
5V
LINEAR OR
SWITCHING
REGULATOR
+
V_CC
TxD
CANH
+
C4
0.01 µF
82C250
CANL
Rs
REF
RXD
GND
VREF
D1
30 V
+
5 V+
4 CAN+
3 SHIELD
2 CAN–
1 V–
C1
0.01 µF
R1
500 V
1M
8 V_DD2
ISO 5 V
V_DD1 1
5V
Figure 21. Recommended DeviceNet Application Circuit.
Implementing PROFIBUS
with the HCPL-0710
An acronym for Process Fieldbus,
PROFIBUS is essentially a
twisted-pair serial link very
similar to RS-485 capable of
achieving high-speed communi-
cation up to 12 MBd. As shown in
Figure 22, a PROFIBUS Control-
ler (PBC) establishes the connec-
tion of a field automation unit
(control or central processing
station) or a field device to the
transmission medium. The PBC
consists of the line transceiver,
optical isolation, frame character
transmitter/receiver (UART), and
the FDL/APP processor with the
interface to the PROFIBUS user.
PROFIBUS USER:
CONTROL STATION
(CENTRAL PROCESSING)
OR FIELD DEVICE
USER INTERFACE
FDL/APP
PROCESSOR
PBC
UART
OPTICAL ISOLATION
TRANSCEIVER
MEDIUM
Figure 22. PROFIBUS Controller
(PBC).