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ADM3486E Fiches technique(PDF) 6 Page - Analog Devices

No de pièce ADM3486E
Description  Full-Duplex, RS-485/RS-422 Transceivers
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
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ADM3486E Fiches technique(HTML) 6 Page - Analog Devices

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ADM3483E/ADM3486E/ADM3488E/ADM3490E/ADM3491E
Rev. A | Page 6 of 20
VCC = 3.3 V, TA = 25°C.
Table 5. ADM3490E/ADM3491E
Parameter
Symbol
Min
Typ
Max
Unit
Test Conditions/Comments
MAXIMUM DATA RATE
12
15
Mbps
DIFFERENTIAL OUTPUT DELAY
tDD
1
22
35
ns
RL = 60 Ω (see Figure 10)
DIFFERENTIAL OUTPUT TRANSITION TIME
tTD
3
11
25
ns
RL = 60 Ω (see Figure 10)
PROPAGATION DELAY
From Low to High Level
tPLH
7
23
35
ns
RL = 27 Ω (see Figure 11)
From High to Low Level
tPHL
7
23
35
ns
RL = 27 Ω (see Figure 11)
|tPLH − tPHL| PROPAGATION DELAY SKEW1
tPDS
−1.4
±8
ns
RL = 27 Ω (see Figure 11)
ENABLE/DISABLE TIMING (ADM3491E ONLY)
Enable Time to Low Level
tPZL
42
90
ns
RL = 110 Ω (see Figure 13)
Enable Time to High Level
tPZH
42
90
ns
RL = 110 Ω (see Figure 12)
Disable Time from Low Level
tPLZ
35
80
ns
RL = 110 Ω (see Figure 13)
Disable Time from High Level
tPHZ
35
80
ns
RL = 110 Ω (see Figure 12)
Enable Time from Shutdown to Low Level
tPSL
650
900
ns
RL = 110 Ω (see Figure 13)
Enable Time from Shutdown to High Level
tPSH
650
900
ns
RL = 110 Ω (see Figure 12)
1 Measured on |tPLH (Y) − tPHL (Y)| and |tPLH (Z) − tPHL (Z)|.
RECEIVER TIMING SPECIFICATIONS
VCC = 3.3 V, TA = 25°C.
Table 6. ADM3483E/ADM3486E/ADM3488E/ADM3490E/ADM3491E
Parameter
Symbol
Min
Typ
Max
Unit
Test Conditions/Comments
PROPAGATION DELAY
From Low to High Level
tRPLH
ADM3486E/ADM3490E/ADM3491E
25
62
90
ns
VID = 0 V to 3.0 V, CL = 15 pF (see Figure 14)
ADM3483E/ADM3488E
25
75
120
ns
VID = 0 V to 3.0 V, CL = 15 pF (see Figure 14)
From High to Low Level
tRPHL
ADM3486E/ADM3490E/ADM3491E
25
62
90
ns
VID = 0 V to 3.0 V, CL = 15 pF (see Figure 14)
ADM3483E/ADM3488E
25
75
120
ns
VID = 0 V to 3.0 V, CL = 15 pF (see Figure 14)
|tRPLH − tRPHL| PROPAGATION DELAY SKEW
tRPDS
ADM3486E/ADM3490E/ADM3491E
+6
±10
ns
VID = 0 V to 3.0 V, CL = 15 pF (see Figure 14)
ADM3483E/ADM3488E
+12
±20
ns
VID = 0 V to 3.0 V, CL = 15 pF (see Figure 14)
ENABLE/DISABLE TIMING (ADM3483E/ADM3486E/
ADM3491E ONLY)
Enable Time to Low Level
tRPZL
25
50
ns
CL = 15 pF (see Figure 15)
Enable Time to High Level
tRPZH
25
50
ns
CL = 15 pF (see Figure 15)
Disable Time from Low Level
tRPLZ
25
45
ns
CL = 15 pF (see Figure 15)
Disable Time from High Level
tRPHZ
25
45
ns
CL = 15 pF (see Figure 15)
Enable Time from Shutdown to Low Level
tRPSL
720
1400
ns
CL = 15 pF (see Figure 15)
Enable Time from Shutdown to High Level
tRPSH
720
1400
ns
CL = 15 pF (see Figure 15)
Time to Shutdown1
tSHDN
80
190
300
ns
1 The transceivers are put into shutdown mode by bringing the RE high and the DE low. If the inputs are in this state for less than 80 ns, the parts are guaranteed not to
enter shutdown. If the parts are in this state for 300 ns or more, the parts are guaranteed to enter shutdown.


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