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 PROFIBUS
application circuit is shown in
Figure 24. Since the HCPL-x710
are fully compatible with CMOS
logic level signals, the
optocoupler is connected directly
to the 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.
Being very similar to multi-station
RS485 systems, the HCPL-061N
optocoupler provides a transmit
disable function which is
necessary to make the bus free
after each master/slave
transmission cycle. Specifically,
the HCPL-061N disables the
transmitter of the line driver by
putting it into a high state mode.
In addition, the HCPL-061N
switches the RX/TX driver IC into
the listen mode. The HCPL-061N
offers HCMOS compatibility and
the high CMR performance
(1 kV/µs at VCM = 1000 V)
essential in industrial
communication interfaces.
GALVANIC
ISOLATION
BOUNDARY
5V
ISO 5 V
8 VDD2
VDD1 1
ISO 5 V
0.01 µF
Rx
7
VIN 2
HCPL-x710
6 VO
3
0.01
µF
5 GND2
GND1 4
8
1R
VCC
0.01
A6
+
µF
SN75176B
RT
SHIELD
4
D
B7
–
5V
ISO 5 V
1 VDD1
VDD2 8
0.01
Tx
2 VIN
7
µF
3 DE
2 RE
GND
5
0.01 µF
1M
0.01 µF
HCPL-x710
3
VO 6
4 GND1
GND2 5
Tx ENABLE
5V
1, 0 kΩ
ISO 5 V
1
VCC 8
2 ANODE
3 CATHODE
VE 7
VO 6
0.01
µF
680 Ω
4
GND 5
HCPL-061N
Figure 24. Recommended PROFIBUS application circuit.
16
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