参数资料
型号: ADM3491AR-REEL
厂商: ANALOG DEVICES INC
元件分类: 通用总线功能
英文描述: 3.3 V Slew Rate Limited, Half- and Full-Duplex, RS-485/RS-422 Transceivers
中文描述: LINE TRANSCEIVER, PDSO14
封装: MS-012AB, SOIC-14
文件页数: 5/20页
文件大小: 315K
代理商: ADM3491AR-REEL
ADM3483/ADM3485/ADM3488/ADM3490/ADM3491
TIMING SPECIFICATIONS—ADM3485/ADM3490/ADM3491
V
CC
= 3.3 V, T
A
= 25°C, unless otherwise noted.
Rev. B | Page 5 of 20
Table 3.
Parameter
DRIVER
Differential Output Delay (t
DD
)
Differential Output Transition Time (t
TD
)
Propagation Delay, Low-to-High Level (t
PLH
)
Propagation Delay, High-to-Low Level (t
PHL
)
|t
PLH
– t
PHL
| Propagation Delay Skew
1
(t
PDS
)
DRIVER OUTPUT ENABLE/DISABLE TIMES (ADM3485/
ADM3491 ONLY)
Output Enable Time to Low Level (t
PZL
)
Output Enable Time to High Level (t
PZH
)
Output Disable Time from High Level (t
PHZ
)
Output Disable Time from Low Level (t
PLZ
)
Output Enable Time from Shutdown to Low Level (t
PSL
)
Output Enable Time from Shutdown to High Level (t
PSH
)
1
Measured on |t
PLH
(Y) t
PHL
(Y)| and |t
PLH
(Z) t
PHL
(Z)|.
Min
1
3
7
7
Typ
22
8
22
22
Max
35
25
35
35
8
Unit
ns
ns
ns
ns
ns
Test Conditions/Comments
R
L
= 60 Ω
(
see Figure 10 and Figure 16)
R
L
= 60 Ω
(
see Figure 10 and Figure 16)
R
L
= 27 Ω
(
see Figure 11 and Figure 17)
R
L
= 27 Ω
(
see Figure 11 and Figure 17)
R
L
= 27 Ω
(
see Figure 11 and Figure 17)
45
45
40
40
650
650
90
90
80
80
900
900
ns
ns
ns
ns
ns
ns
R
L
= 110 Ω
(
see Figure 13 and Figure 19)
R
L
= 110 Ω
(
see Figure 12 and Figure 18)
R
L
= 110 Ω
(
see Figure 12 and Figure 18)
R
L
= 110 Ω
(
see Figure 13 and Figure 19)
R
L
= 110 Ω
(
see Figure 13 and Figure 19)
R
L
= 110 Ω
(
see Figure 12 and Figure 18)
TIMING SPECIFICATIONS—ADM3483/ADM3488
V
CC
= 3.3 V, T
A
= 25°C, unless otherwise noted.
Table 4.
Parameter
DRIVER
Differential Output Delay (t
DD
)
Differential Output Transition Time (t
TD
)
Propagation Delay, Low-to-High Level (t
PLH
)
Propagation Delay, High-to-Low Level (t
PHL
)
|t
PLH
– t
PHL
| Propagation Delay Skew
1
(t
PDS
)
DRIVER OUTPUT ENABLE/DISABLE TIMES (ADM3483 ONLY)
Output Enable Time to Low Level (t
PZL
)
Output Enable Time to High Level (t
PZH
)
Output Disable Time from High Level (t
PHZ
)
Output Disable Time from Low Level (t
PLZ
)
Output Enable Time from Shutdown to Low Level (t
PSL
)
Output Enable Time from Shutdown to High Level (t
PSH
)
1
Measured on |t
PLH
(Y) t
PHL
(Y)| and |t
PLH
(Z) t
PHL
(Z)|.
Min
600
400
700
700
Typ
900
700
1000
1000
100
900
600
50
50
1.9
2.2
Max
1400
1200
1500
1500
1300
800
80
80
2.7
3.0
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
μs
μs
Test Conditions/Comments
R
L
= 60 Ω
(
see Figure 10 and Figure 16)
R
L
= 60 Ω
(
see Figure 10 and Figure 16)
R
L
= 27 Ω
(
see Figure 11 and Figure 17)
R
L
= 27 Ω
(
see Figure 11 and Figure 17)
R
L
= 27 Ω
(
see Figure 11 and Figure 17)
R
L
= 110 Ω
(
see Figure 13 and Figure 19)
R
L
= 110 Ω
(
see Figure 12 and Figure 18)
R
L
= 110 Ω
(
see Figure 12 and Figure 18)
R
L
= 110 Ω
(
see Figure 13 and Figure 19)
R
L
= 110 Ω
(
see Figure 13 and Figure 19)
R
L
= 110 Ω
(
see Figure 12 and Figure 18)
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