Datasheet

ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857
Rev. D | Page 4 of 16
ADM4850/ADM4854 TIMING SPECIFICATIONS
V
CC
= 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, see Figure 20
Skew, t
SKEW
70 ns R
LDIFF
= 54 Ω, C
L1
= C
L2
= 100 pF, see Figure 20
Rise/Fall Times, t
R
, t
F
600 2400 ns R
LDIFF
= 54 Ω, C
L1
= C
L2
= 100 pF, see Figure 20
Enable Time, t
ZH
2000 ns R
L
= 500 Ω, C
L
= 100 pF, see Figure 21, ADM4850
Disable Time, t
ZL
2000 ns R
L
= 500 Ω, C
L
= 15 pF, see Figure 21, ADM4850
Enable Time from Shutdown 4000 ns R
L
= 500 Ω, C
L
= 100 pF, see Figure 21, ADM4850
RECEIVER
Propagation Delay, t
PLH
, t
PHL
400 1000 ns C
L
= 15 pF, see Figure 22
Differential Skew, t
SKEW
255 ns C
L
= 15 pF, see Figure 22
Enable Time 5 50 ns R
L
= 1 kΩ, C
L
= 15 pF, see Figure 23, ADM4850
Disable Time 20 50 ns R
L
= 1 kΩ, C
L
= 15 pF, see Figure 23, ADM4850
Enable Time from Shutdown 4000 ns R
L
= 1 kΩ, C
L
= 15 pF, see Figure 23, ADM4850
Time to Shutdown 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
CC
= 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, see Figure 20
Skew, t
SKEW
40 ns R
LDIFF
= 54 Ω, C
L1
= C
L2
= 100 pF, see Figure 20
Rise/Fall Times, t
R
, t
F
200 600 ns R
LDIFF
= 54 Ω, C
L1
= C
L2
= 100 pF, see Figure 20
Enable Time, t
ZH
1000 ns R
L
= 500 Ω, C
L
= 100 pF, see Figure 21, ADM4851
Disable Time, t
ZL
1000 ns R
L
= 500 Ω, C
L
= 15 pF, see Figure 21, ADM4851
Enable Time from Shutdown 4000 ns R
L
= 500 Ω, C
L
= 100 pF, see Figure 21, ADM4851
RECEIVER
Propagation Delay, t
PLH
, t
PHL
400 1000 ns C
L
= 15 pF, see Figure 22
Differential Skew, t
SKEW
250 ns C
L
= 15 pF, see Figure 22
Enable Time 5 50 ns R
L
= 1 kΩ, C
L
= 15 pF, see Figure 23, ADM4851
Disable Time 20 50 ns R
L
= 1 kΩ, C
L
= 15 pF, see Figure 23, ADM4851
Enable Time from Shutdown 4000 ns R
L
= 1 kΩ, C
L
= 15 pF, see Figure 23, ADM4851
Time to Shutdown 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.