MAX3480A Просмотр технического описания (PDF) - Maxim Integrated
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MAX3480A Datasheet PDF : 16 Pages
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Complete, Isolated, 3.3V
RS-485/RS-422 Data Interface
____________________________Typical Operating Characteristics (continued)
(VCC_ = 3.3V, TA = +25°C, unless otherwise noted.)
MAX3480A DRIVER INPUT (AB)
AND RECEIVER OUTPUT (RO)
DE´ INPUT,
2V/div
MAX3480A DRIVER ENABLE (AB)
AND RECEIVER OUTPUT (RO)
DE´ INPUT,
1V/div
A
2V/div
B
RO,
74HC240,
DI,
2V/div
A, 1V/div
B, 2V/div
100ns/div
CIRCUIT OF FIGURE 2, TERMINATION: 100Ω
MAX3480B DRIVER INPUT (AB)
AND RECEIVER OUTPUT (RO)
100ns/div
CIRCUIT OF FIGURE 2, TERMINATION: 100Ω
MAX3480B DRIVER ENABLE (AB)
AND RECEIVER OUTPUT (RO)
DE´ INPUT,
2V/div
DE´ INPUT,
1V/div
A
2V/div
B
RO,
74HC240,
DI,
2V/div
A, 1V/div
B, 2V/div
MAX3480A
SUPPLY CURRENT vs. SUPPLY VOLTAGE
350
DE´ HIGH, 50Ω LOAD
300
250
DE´ HIGH, 100Ω LOAD
200
DE´ LOW, DI´ LOW
150
DE´ LOW, DI´ HIGH
100
50
0
3.0
3.2
3.4
3.6
3.8
SUPPLY VOLTAGE (V)
MAX3480B
SUPPLY CURRENT vs. SUPPLY VOLTAGE
300
DE´ HIGH, 50Ω LOAD
250
200
DE´ HIGH,
100Ω LOAD
150
DE´ LOW, DI´ LOW
100
DE´ LOW, DI´ HIGH
50
1µs/div
CIRCUIT OF FIGURE 2, TERMINATION: 100Ω
25µs/div
CIRCUIT OF FIGURE 2, TERMINATION: 100Ω
DRIVER ENABLE TIME
vs. TEMPERATURE
100
100
0
3.0
3.2
3.4
3.6
3.8
SUPPLY VOLTAGE (V)
DRIVER DISABLE TIME
vs. TEMPERATURE
MAX3480B
10
RL = 54Ω, DI´ = 0V MEASURED FROM
DE´ TO VALID OUTPUT
1
MAX3480A
0.1
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
MAX3480B
10
RL = 54Ω, DI´ = 0V MEASURED FROM
DE´ TO VALID OUTPUT
1
MAX3480A
0.1
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
6 _______________________________________________________________________________________
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