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ADM2485BRWZ Folha de dados(PDF) 3 Page - Analog Devices

Nome de Peças ADM2485BRWZ
Descrição Electrónicos  High Speed Isolated RS-485 Transceiver with Integrated Transformer Driver
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Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
Logo AD - Analog Devices

ADM2485BRWZ Folha de dados(HTML) 3 Page - Analog Devices

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Preliminary Technical Data
ADM2485
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
POWER SUPPLY CURRENT
Logic Side
Bus Side
1.0
4.0
2.1
43.0
58.0
1.3
0.8
1.1
3.0
mA
mA
mA
mA
mA
mA
mA
mA
mA
RTS = 0 V, VDD1
= 5.5 V
2 Mbps, VDD1
= 5.5 V, Figure 5
16 Mbps, VDD1
= 5.5 V, Figure 5
RTS = 0 V, VDD1
= 3 V
2 Mbps, VDD1
= 3 V, Figure 5
16 Mbps, VDD1
= 3 V, Figure 5
RTS = 0 V
2 Mbps, RTS = VDD1, Figure 5
16 Mbps, RTS = VDD1, Figure 5
COMMON-MODE TRANSIENT IMMUNITY1
25
kV/µs
VCM = 1 kV, Transient Magnitude =
800 V
HIGH FREQUENCY COMMON-MODE NOISE
IMMUNITY
100
mV
VHF = +5V, −2 V < VTEST2 < 7 V,
1 < fTEST < 50 MHz, Figure 6
1 CM is the maximum common-mode voltage slew rate that can be sustained while maintaining specification-compliant operation. VCM is the common-mode potential
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.
TIMING SPECIFICATIONS
2.7 ≤ VDD1 ≤ 5.5 V, 4.75 V ≤ VDD2 ≤ 5.25 V, TA = TMIN to TMAX, unless otherwise noted.
Table 2.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
DRIVER
Maximum Data Rate
16
Mbps
Propagation Delay Input to Output
25
45
55
ns
RLDIFF = 54
Ω, CL1 = CL2 = 100 pF; See Figure 7.
tPLH, tPHL
RTS-to-DE Propagation Delay
20
35
55
ns
See Figure 8.
Driver O/P to O/P tSKEW
2
5
ns
RLDIFF = 54
Ω, CL1 = CL2 = 100 pF; See Figure 7 and
Figure 12.
Rise/Fall Time tR, tF
5
15
ns
RLDIFF = 54
Ω, CL1 = CL2 = 100 pF; See Figure 7 and
Figure 12.
Enable Time
43
53
ns
See Figure 9 and Figure 14.
Disable Time
43
55
ns
See Figure 9 and Figure 14.
Enable Skew, |tAZH-tBZL|, |tAZL-tBZH|
1
3
ns
See Figure 9 and Figure 14.
Disable Skew, |tAHZ-tBLZ|, |tALZ-tBHZ|
2
5
ns
See Figure 9 and Figure 14.
RECEIVER
Propagation Delay tPLH, tPHL
25
45
55
ns
CL = 15 pF; See Figure 10 and Figure 13.
Differential Skew tSKEW
5
ns
CL = 15 pF; See Figure 10 and Figure 13.
Enable Time
3
13
ns
RL = 1 k
Ω, CL = 15 pF; See Figure 11 and
Figure 15.
Disable Time
3
13
ns
RL = 1 k
Ω, CL = 15 pF; See Figure 11 and
Figure 15.
Rev. PrK | Page 3 of 15


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