Datasheet

ADM4850–ADM4857
Rev. 0 | Page 4 of 16
ADM4850/ADM4854 TIMING SPECIFICATIONS
V = 5 V ± 5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Table 3.
Parameter Min Typ Max Unit Test Conditions/Comments
DRIVER
Maximum Data Rate 115 kbps
Propagation Delay t
PLH
, t
PHL
600 2500 ns R
LDIFF
= 54 Ω, C
L1
= C
L2
= 100 pF, Figure 6
Skew t
SKEW
70 ns R
LDIFF
= 54 Ω, C
L1
= C
L2
= 100 pF, Figure 6
Rise/Fall Time t
R
, t
F
600 2400 ns R
LDIFF
= 54 Ω, C
L1
= C
L2
= 100 pF, Figure 6
Enable Time 2000 ns R
L
= 500 Ω, C
L
= 100 pF, Figure 7, ADM4850
Disable Time 2000 ns R
L
= 500 Ω, C
L
= 15 pF, Figure 7, ADM4850
Enable Time from Shutdown 4000 ns R
L
= 500 Ω, C
L
= 100 pF, Figure 7, ADM4850
RECEIVER
Propagation Delay t
PLH
, t
PH
400 1000 ns C
L
= 15 pF, Figure 8
Differential Skew t
SKEW
255 ns C
L
= 15 pF, Figure 8
Enable Time 5 50 ns R
L
= 1 kΩ, C
L
= 15 pF, Figure 9, ADM4850
Disable Time 20 50 ns R
L
= 1 kΩ, C
L
= 15 pF, Figure 9, ADM4850
Enable Time from Shutdown 4000 ns R
L
= 1 kΩ, C
L
= 15 pF, Figure 9, ADM4850
Time to Shut Down 50 330 3000 ns ADM4850
1
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.
ADM4851/ADM4855 TIMING SPECIFICATIONS
V = 5 V ± 5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Table 4.
Parameter Min Typ Max Unit Test Conditions/Comments
DRIVER
Maximum Data Rate 500 kbps
Propagation Delay t
PLH
, t
PHL
250 600 ns R
LDIFF
= 54 Ω, C
L1
= C
L2
= 100 pF, Figure 6
Skew t
SKEW
40 ns R
LDIFF
= 54 Ω, C
L1
= C
L2
= 100 pF, Figure 6
Rise/Fall Time t
R
, t
F
200 600 ns R
LDIFF
= 54 Ω, C
L1
= C
L2
= 100 pF, Figure 6
Enable Time 1000 ns R
L
= 500 Ω, C
L
= 100 pF, Figure 7, ADM4851
Disable Time 1000 ns R
L
= 500 Ω, C
L
= 15 pF, Figure 7, ADM4851
Enable Time from Shutdown 4000 ns R
L
= 500 Ω, C
L
= 100 pF, Figure 7, ADM4851
RECEIVER
Propagation Delay t
PLH
, t
PHL
400 1000 ns C
L
= 15 pF, Figure 8
Differential Skew t
SKEW
250 ns C
L
= 15 pF, Figure 8
Enable Time 5 50 ns R
L
= 1 kΩ, C
L
= 15 pF, Figure 9, ADM4851
Disable Time 20 50 ns R
L
=1 kΩ, C
L
= 15 pF, Figure 9, ADM4851
Enable Time from Shutdown 4000 ns R
L
=1 kΩ, C
L
= 15 pF, Figure 9, ADM4851
Time to Shut Down 50 330 3000 ns ADM4851
1
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.