參數(shù)資料
型號(hào): ADM485E
廠商: Analog Devices, Inc.
英文描述: 5 V, 【15 kV ESD Protected Half-Duplex, RS-485/RS-422 Transceivers
中文描述: 5,【15千伏ESD保護(hù)半V型雙工,RS-485/RS-422收發(fā)器
文件頁(yè)數(shù): 11/16頁(yè)
文件大?。?/td> 297K
代理商: ADM485E
ADM485E/ADM487E/ADM1487E
TEST CIRCUITS AND SWITCHING CHARACTERISTICS
Y
Rev. 0 | Page 11 of 16
0
Z
V
OD
V
OC
R
L
R
L
Figure 18. Driver DC Test Load
0
DI
DE
V
DD
A
B
R
L
C
L
C
L
V
OD
Figure 19. Driver Timing Test Circuit
5V
1.5V
1/2V
O
20%
80%
80%
20%
DI
A
B
0V
0V
–V
O
V
O
V
O
V
DIFF
t
SKEW
=
t
DPLH
– t
DPHL
V
DIFF
= V (A) – V (B)
t
DR
t
DPLH
t
DPHL
t
DF
1/2 V
O
0
Figure 20. Driver Propagation Delays
GENERATOR
0 OR 5V
50
R
L
= 500
OUT
C
L
S1
1.5V
5V
0V
V
OH
0V
0.5V
2.3V
OUT
DE
t
DHZ
t
DZH,
t
DZH(SHDN)
0
D
Figure 21. Driver Enable and Disable Times (t
DHZ
, t
DZH
, t
DZH(SHDN)
)
GENERATOR
0V OR 5V
50
D
R
L
= 500
V
CC
OUT
C
L
S1
V
CC
/2
5V
0V
0.5V
2.3V
V
OL
OUT
V
CC
DE
t
DLZ
t
DZL,
t
DZL(SHDN)
0
Figure 22. Driver Enable and Disable Times (t
DZL
, t
DLZ
, t
DZL(SHDN)
)
ATE
B
RECEIVER
OUTPUT
A
R
V
ID
0
Figure 23. Receiver Propagation Delay Test Circuit
THE RISE TIME AND FALL TIME OF INPUT A AND INPUT B < 4ns
+1V
–1V
t
RPHL
t
RPLH
1.5V
B
RO
V
OH
V
OL
A
0
Figure 24. Receiver Propagation Delays
相關(guān)PDF資料
PDF描述
ADM485EARZ 5 V, 【15 kV ESD Protected Half-Duplex, RS-485/RS-422 Transceivers
ADM485EARZ-REEL7 5 V, 【15 kV ESD Protected Half-Duplex, RS-485/RS-422 Transceivers
ADM487E 5 V, 【15 kV ESD Protected Half-Duplex, RS-485/RS-422 Transceivers
ADM487EARZ 5 V, 【15 kV ESD Protected Half-Duplex, RS-485/RS-422 Transceivers
ADM487EARZ-REEL7 5 V, 【15 kV ESD Protected Half-Duplex, RS-485/RS-422 Transceivers
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ADM485JNZ1 制造商:AD 制造商全稱:Analog Devices 功能描述:Meets EIA RS-485 standard