參數(shù)資料
型號(hào)： ADM3490E
廠(chǎng)商： Analog Devices, Inc.
英文描述： 3.3 V, 【15 kV ESD-Protected, Half- and Full-Duplex, RS-485/RS-422 Transceivers
中文描述： 3.3伏特，【15千伏ESD保護(hù)，半和全雙工，RS-485/RS-422收發(fā)器
文件頁(yè)數(shù)： 6/20頁(yè)
文件大?。?/td> 503K
代理商： ADM3490E
ADM3483E/ADM3486E/ADM3488E/ADM3490E/ADM3491E
V
CC
= 3.3 V, T
A
= 25°C.
Rev. A | Page 6 of 20
Table 5. ADM3490E/ADM3491E
Parameter
MAXIMUM DATA RATE
DIFFERENTIAL OUTPUT DELAY
DIFFERENTIAL OUTPUT TRANSITION TIME
PROPAGATION DELAY
From Low to High Level
From High to Low Level
|t
PLH
t
PHL
| PROPAGATION DELAY SKEW
1
ENABLE/DISABLE TIMING (ADM3491E ONLY)
Enable Time to Low Level
Enable Time to High Level
Disable Time from Low Level
Disable Time from High Level
Enable Time from Shutdown to Low Level
Enable Time from Shutdown to High Level
1
Measured on |t
PLH
(Y) t
PHL
(Y)| and |t
PLH
(Z) t
PHL
(Z)|.
Symbol
t
DD
t
TD
t
PLH
t
PHL
t
PDS
t
PZL
t
PZH
t
PLZ
t
PHZ
t
PSL
t
PSH
Min
12
1
3
7
7
Typ
15
22
11
23
23
1.4
42
42
35
35
650
650
Max
35
25
35
35
±8
90
90
80
80
900
900
Unit
Mbps
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Test Conditions/Comments
R
L
= 60 Ω (see Figure 10)
R
L
= 60 Ω (see Figure 10)
R
L
= 27 Ω (see Figure 11)
R
L
= 27 Ω (see Figure 11)
R
L
= 27 Ω (see Figure 11)
R
L
= 110 Ω (see Figure 13)
R
L
= 110 Ω (see Figure 12)
R
L
= 110 Ω (see Figure 13)
R
L
= 110 Ω (see Figure 12)
R
L
= 110 Ω (see Figure 13)
R
L
= 110 Ω (see Figure 12)
RECEIVER TIMING SPECIFICATIONS
V
CC
= 3.3 V, T
A
= 25°C.
Table 6. ADM3483E/ADM3486E/ADM3488E/ADM3490E/ADM3491E
Parameter
PROPAGATION DELAY
From Low to High Level
ADM3486E/ADM3490E/ADM3491E
ADM3483E/ADM3488E
From High to Low Level
ADM3486E/ADM3490E/ADM3491E
ADM3483E/ADM3488E
|t
RPLH
t
RPHL
| PROPAGATION DELAY SKEW
ADM3486E/ADM3490E/ADM3491E
ADM3483E/ADM3488E
ENABLE/DISABLE TIMING (ADM3483E/ADM3486E/
ADM3491E ONLY)
Enable Time to Low Level
Enable Time to High Level
Disable Time from Low Level
Disable Time from High Level
Enable Time from Shutdown to Low Level
Enable Time from Shutdown to High Level
Time to Shutdown
1
1
The transceivers are put into shutdown mode by bringing the RE high and the DE low. If the inputs are in this state for less than 80 ns, the parts are guaranteed not to
enter shutdown. If the parts are in this state for 300 ns or more, the parts are guaranteed to enter shutdown.
Symbol
t
RPLH
t
RPHL
t
RPDS
Min
25
25
25
25
Typ
62
75
62
75
+6
+12
Max
90
120
90
120
±10
±20
Unit
ns
ns
ns
ns
ns
ns
Test Conditions/Comments
V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 14)
V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 14)
V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 14)
V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 14)
V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 14)
V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 14)
t
RPZL
t
RPZH
t
RPLZ
t
RPHZ
t
RPSL
t
RPSH
t
SHDN
80
25
25
25
25
720
720
190
50
50
45
45
1400
1400
300
ns
ns
ns
ns
ns
ns
ns
C
L
= 15 pF (see Figure 15)
C
L
= 15 pF (see Figure 15)
C
L
= 15 pF (see Figure 15)
C
L
= 15 pF (see Figure 15)
C
L
= 15 pF (see Figure 15)
C
L
= 15 pF (see Figure 15)
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