ADM2582EBRWZ-REEL7(2009) Ver la hoja de datos (PDF) - Analog Devices
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Fabricante
ADM2582EBRWZ-REEL7
(Rev.:2009)
(Rev.:2009)
Analog Devices
ADM2582EBRWZ-REEL7 Datasheet PDF : 20 Pages
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ADM2582E/ADM2587E
TYPICAL APPLICATIONS
Figure 41 and Figure 42 show typical applications of the ADM2582E/
ADM2587E in half duplex and full duplex RS-485 network
configurations. Up to 256 transceivers can be connected to the
RS-485 bus. To minimize reflections, terminate the line at the
receiving end in its characteristic impedance, and keep stub
lengths off the main line as short as possible. For half-duplex
operation, this means that both ends of the line must be
terminated because either end can be the receiving end.
ADM2582E/
ADM2587E
A
RxD
R
B
RE
DE
Z
TxD
D
Y
MAXIMUM NUMBER OF TRANSCEIVERS ON BUS = 256
RT
A
BZ
Y
RT
A
BZ
Y
ADM2582E/
ADM2587E
A
B
R
RxD
RE
DE
Z
Y
D
TxD
R
R
ADM2582E/
D
ADM2582E/
D
ADM2587E
ADM2587E
RxD RE DE TxD
RxD RE DE TxD
NOTES
1. RT IS EQUAL TO THE CHARACTERISTIC IMPEDANCE OF THE CABLE.
2. ISOLATION NOT SHOWN.
Figure 41. ADM2582E/ADM2587E Typical Half Duplex RS-485 Network
RxD
RE
DE
TxD
MASTER
R
D
A
B RT
Z
Y
MAXIMUM NUMBER OF NODES = 256
Y
Z
B
RT
A
SLAVE
D
R
TxD
DE
RE
RxD
ADM2582E/
ADM2587E
AB
SLAVE
ZY
AB
ZY
SLAVE
ADM2582E/
ADM2587E
R
D
ADM2582E/
ADM2587E
R
D
ADM2582E/
ADM2587E
RxD RE DE TxD
RxD RE DE TxD
NOTES
1. RT IS EQUAL TO THE CHARACTERISTIC IMPEDANCE OF THE CABLE.
2. ISOLATION NOT SHOWN.
Figure 42. ADM2582E/ADM2587E Typical Full Duplex RS-485 Network
Rev. 0 | Page 19 of 20
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