HCPL-0710 View Datasheet(PDF) - HP => Agilent Technologies
Part Name
Description
MFG CO.
'HCPL-0710' PDF : 17 Pages View PDF
Power Supplies and Bypassing
The recommended DeviceNet
application circuit is shown in
Figure 22. Since the HCPL-x710
are fully compatible with CMOS
logic level signals, the optocoupler
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-
x710. 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 capacitors 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 VDD1
VDD2 8
2 VIN
7
HCPL-x710
3
VO 6
4 GND1
GND2 5
GND
RX0
0.01 µF
5 GND2
GND1 4
6 VO
3
HCPL-x710
7
VIN 2
0.01
µF
0.01
µF
5V
LINEAR OR
SWITCHING
REGULATOR
+
VCC
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 VDD2
ISO 5 V
VDD1 1
5V
Figure 22. Recommended DeviceNet application circuit.
Implementing PROFIBUS with the
HCPL-x710
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 23, a PROFIBUS Controller
(PBC) establishes the connection
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
MEDIUM
TRANSCEIVER
Figure 23. PROFIBUS Controller (PBC).
15
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