Datasheet

MAX3480EA/MAX3480EB
±15kV ESD-Protected, Isolated, 3.3V
RS-485/RS-422 Data Interfaces
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V
CC_
= +3.3V, T
A
= +25°C, Figure 1, unless otherwise noted.)
0
0.5
1.5
1.0
2.0
2.5
-40 0-20 20 40 60 80
DRIVER ENABLE TIME
vs. TEMPERATURE
MAX3480EA/EB toc14
TEMPERATURE (°C)
DRIVER ENABLE TIME (µs)
R
L
= 54Ω, DI´ = 0
MEASURED FROM DE
´
TO VALID OUTPUT
MAX3480EB
MAX3480EA
350
0
MAX3480EA
SUPPLY CURRENT vs. SUPPLY VOLTAGE
300
250
MAX3480EA/EB toc10
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
100
150
50
3.0 3.2 3.4 3.6 3.8
200
DE´ HIGH, 50
Ω
LOAD
DE
´ HIGH, 100
Ω
LOAD
DE´ LOW, DI´ LOW, R
L
=
∞
DE´ LOW, DI´ HIGH, R
L
=
∞
300
0
MAX3480EB
SUPPLY CURRENT vs. SUPPLY VOLTAGE
200
250
MAX3480EA/EB toc13
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
100
50
3.0 3.2 3.63.4 3.8
150
DE´ HIGH,
100Ω LOAD
DE´ HIGH, 50Ω LOAD
DE´ LOW, DI´ LOW, R
L
= ∞
DE´ LOW, DI´ HIGH, R
L
= ∞
MAX3480EB DRIVER INPUT (AB)
AND RECEIVER OUTPUT (RO)
1µs/div
DI
´ INPUT,
2V/div
A
B
RO,
74HC240,
2V/div
2V/div
MAX3480EA/EB toc11
MAX3480EA DRIVER INPUT (AB)
AND RECEIVER OUTPUT (RO)
CIRCUIT OF FIGURE 2, TERMINATION: 100Ω
100ns/div
DI
´ INPUT,
2V/div
A
B
RO,
74HC240,
2V/div
2V/div
MAX3480EA/EB toc08
MAX3480EA DRIVER ENABLE (AB)
AND RECEIVER OUTPUT (RO)
MAX3480EA/EB toc09
CIRCUIT OF FIGURE 2, TERMINATION: 100Ω
DE
´ INPUT,
1V/div
A, 1V/div
B, 2V/div
100ns/div
MAX3480EB DRIVER ENABLE (DE´)
AND DRIVER OUTPUT (AB)
MAX3480EA/EB toc12
DE´
1V/div
A
2V/div
B
2V/div
20µs/div
0.5
1.5
1.0
2.0
DRIVER ENABLE TIME
vs. TEMPERATURE
MAX3480EA/EB TOC15
TEMPERATURE (°C)
DRIVER ENABLE TIME (µs)
-40 -20 0 20 40 60 80
MAX3480EA
MAX3480EB
R
L
= 54Ω, DI´ = 0V MEASURED FROM
DE
´ TO VALID OUTPUT