HCPL-7710-500E View Datasheet(PDF) - Avago Technologies
Part Name
Description
MFG CO.
'HCPL-7710-500E' PDF : 17 Pages View PDF
Power Supplies and Bypassing
The recommended DeviceNet application circuit is
shown in Figure 22. As the HCPL-x710 are fully compat-
ible 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
HCPL-0710
3
7
VO 6
4 GND1
GND2 5
GND
RX0
0.01 µF
5 GND2
GND1 4
6 VO
3
HCPL-0710
7
VIN 2
5V
LINEAR OR
SWITCHING
0.01
+
REGULATOR
µF
VCC
TxD
CANH
+
C4
0.01 µF
82C250
CANL
Rs
REF
VREF
RXD
GND
0.01
D1
µF
30 V
8 VDD2
VDD1 1
ISO 5 V
5V
Figure 22. Recommended DeviceNet application circuit
+
5 V+
4 CAN+
3 SHIELD
2 CAN–
1 V–
C1
0.01 µF
500 V
R1
1M
Implementing PROFIBUS with the HCPL-x710
An acronym for Process Fieldbus, PROFIBUS is essen-
tially a twisted-pair serial link very similar to RS-485
capable of achieving high-speed communication 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
UART
PBC
OPTICAL ISOLATION
TRANSCEIVER
MEDIUM
Figure 23. PROFIBUS Controller (PBC)
16
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