adm2485 Analog Devices, Inc., adm2485 Datasheet - Page 4

• Manufacturer Part Number: adm2485
• Description: High Speed Isolated Rs-485 Transceiver With Integrated Transformer Driver
• Manufacturer: Analog Devices, Inc.

ADM2485
Parameter
POWER SUPPLY CURRENT
COMMON-MODE TRANSIENT IMMUNITY
HIGH FREQUENCY COMMON-MODE
NOISE IMMUNITY
1
TIMING SPECIFICATIONS
2.7 V ≤ V
Table 2.
Parameter
DRIVER
RECEIVER
CM is the maximum common-mode voltage slew rate that can be sustained while maintaining specification-compliant operation. V
difference between the logic and bus sides. The transient magnitude is the range over which the common mode is slewed. The common-mode voltage slew rates
apply to both rising and falling common-mode voltage edges.
Logic Side
Bus Side
Maximum Data Rate
Propagation Delay Input to Output
RTS-to-DE Propagation Delay
Driver Output to Output, t
Rise/Fall Time, t
Enable Time
Disable Time
Enable Skew, |t
Disable Skew, |t
Propagation Delay, t
Differential Skew, t
Enable Time
Disable Time
t
PLH
, t
DD1
PHL
≤ 5.5 V, 4.75 V ≤ V
AZH
R
AHZ
, t
F
– t
– t
SKEW
PLH
BZL
BLZ
, t
|, |t
|, |t
PHL
AZL
SKEW
ALZ
– t
– t
DD2
BZH
BHZ
≤ 5.25 V, T
|
|
1
A
= T
Min
16
25
20
25
Min
25
MIN
to T
Typ
45
35
2
5
43
43
1
2
45
3
3
MAX
Rev. 0 | Page 4 of 20
Typ
2.3
5.0
1.26
1.5
2.9
1.7
49.0
55.0
100
, unless otherwise noted.
Max
55
55
5
15
53
55
3
5
55
5
13
13
Unit
Mbps
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Max
2.5
6.5
2.5
75.0
Test Conditions/Comments
R
(See Figure 8)
R
and Figure 12)
R
and Figure 12)
(See Figure 9 and Figure 14)
(See Figure 9 and Figure 14)
(See Figure 9 and Figure 14)
(See Figure 9 and Figure 14)
C
C
R
Figure 15)
R
Figure 15)
LDIFF
LDIFF
LDIFF
L
L
L
L
Unit
mA
mA
mA
mA
mA
mA
mA
mA
mA
kV/μs
mV
= 15 pF (see Figure 10 and Figure 13)
= 15 pF (see Figure 10 and Figure 13)
= 1 kΩ, C
= 1 kΩ, C
= 54 Ω, C
= 54 Ω, C
= 54 Ω, C
Test Conditions/Comments
RTS = 0 V, V
2.5 Mbps, V
16 Mbps, V
RTS = 0 V, V
2.5 Mbps, V
16 Mbps, V
RTS = 0 V
2.5 Mbps, RTS = V
load conditions)
16 Mbps, RTS = V
load conditions)
Transient magnitude = 800 V, V
V
1 MHz < f
L
L
HF
= 15 pF (see Figure 11 and
= 15 pF (see Figure 11 and
L1
L1
L1
= 5 V, −2 V < V
= C
= C
= C
L2
L2
L2
TEST
= 100 pF (see Figure 7)
= 100 pF (see Figure 7
= 100 pF (see Figure 7
DD1
DD1
DD1
DD1
DD1
DD1
< 50 MHz (see Figure 6)
CM
= 5.5 V (see Figure 5)
= 3.3 V (see Figure 5)
= 5.5 V
= 5.5 V (see Figure 5)
= 3.3 V
= 3.3 V (see Figure 5)
is the common-mode potential
DD1
DD1
TEST2
(see Figure 5 for
(see Figure 5 for
< +7 V,
CM
= 1 kV