ADM4850 AD [Analog Devices], ADM4850 Datasheet - Page 4

• Manufacturer Part Number: ADM4850
• Description: 5 V Slew-Rate Limited Half- and Full-Duplex RS-485/RS-422 Transceivers
• Manufacturer: AD [Analog Devices]

ADM4850–ADM4857
ADM4850/ADM4854 TIMING SPECIFICATIONS
V = 5 V ± 5%, T
Table 3.
Parameter
DRIVER
RECEIVER
1
ADM4851/ADM4855 TIMING SPECIFICATIONS
V = 5 V ± 5%, T
Table 4.
Parameter
DRIVER
RECEIVER
1
The half-duplex device is put into shutdown mode by driving RE high and DE low. If these inputs are in this state for less than 50 ns, the device is guaranteed not to
enter shutdown mode. If the enable inputs are in this state for at least 3000 ns, the device is guaranteed to enter shutdown mode.
The half-duplex device is put into shutdown mode by driving RE high and DE low. If these inputs are in this state for less than 50 ns, the device is guaranteed not to
enter shutdown mode. If the enable inputs are in this state for at least 3000 ns, the device is guaranteed to enter shutdown mode.
Maximum Data Rate
Propagation Delay t
Skew t
Rise/Fall Time t
Enable Time
Disable Time
Enable Time from Shutdown
Propagation Delay t
Differential Skew t
Enable Time
Disable Time
Enable Time from Shutdown
Time to Shut Down
Maximum Data Rate
Propagation Delay t
Skew t
Rise/Fall Time t
Enable Time
Disable Time
Enable Time from Shutdown
Propagation Delay t
Differential Skew t
Enable Time
Disable Time
Enable Time from Shutdown
Time to Shut Down
SKEW
SKEW
A
A
R
R
= T
= T
, t
, t
F
F
SKEW
SKEW
MIN
MIN
PLH
PLH
PLH
PLH
, t
, t
, t
, t
to T
to T
PHL
PH
PHL
PHL
MAX
MAX
, unless otherwise noted.
, unless otherwise noted.
Min
500
250
200
400
50
Min
115
600
600
400
50
Typ
4000
5
20
4000
330
Typ
4000
5
20
4000
330
Rev. 0 | Page 4 of 16
Max
600
40
600
1000
1000
1000
250
50
50
3000
Max
2500
70
2400
2000
2000
1000
255
50
50
3000
Unit
kbps
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Unit
kbps
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Test Conditions/Comments
R
R
R
R
R
R
C
C
R
R
R
ADM4851
Test Conditions/Comments
R
R
R
R
R
R
C
C
R
R
R
ADM4850
LDIFF
LDIFF
LDIFF
L
L
L
L
L
L
L
L
LDIFF
LDIFF
LDIFF
L
L
L
L
L
L
L
L
= 500 Ω, C
= 500 Ω, C
= 500 Ω, C
= 15 pF, Figure 8
= 15 pF, Figure 8
= 1 kΩ, C
=1 kΩ, C
=1 kΩ, C
= 500 Ω, C
= 500 Ω, C
= 500 Ω, C
= 1 kΩ, C
= 1 kΩ, C
= 1 kΩ, C
= 15 pF, Figure 8
= 15 pF, Figure 8
= 54 Ω, C
= 54 Ω, C
= 54 Ω, C
= 54 Ω, C
= 54 Ω, C
= 54 Ω, C
1
1
L
L
L
L
L
L
= 15 pF, Figure 9, ADM4851
= 15 pF, Figure 9, ADM4851
L
L
L
= 15 pF, Figure 9, ADM4851
= 15 pF, Figure 9, ADM4850
= 15 pF, Figure 9, ADM4850
= 15 pF, Figure 9, ADM4850
L
L
L
= 100 pF, Figure 7, ADM4851
= 15 pF, Figure 7, ADM4851
= 100 pF, Figure 7, ADM4851
= 100 pF, Figure 7, ADM4850
= 15 pF, Figure 7, ADM4850
= 100 pF, Figure 7, ADM4850
L1
L1
L1
L1
L1
L1
= C
= C
= C
= C
= C
= C
L2
L2
L2
L2
L2
L2
= 100 pF, Figure 6
= 100 pF, Figure 6
= 100 pF, Figure 6
= 100 pF, Figure 6
= 100 pF, Figure 6
= 100 pF, Figure 6