1318 Просмотр технического описания (PDF) - Linear Technology
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1318 Datasheet PDF : 8 Pages
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LTC1318
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current vs Temperature
10.0
9.8 VCC = 5V
9.6
9.4
9.2
9.0
8.8
8.6
8.4
8.2
8.0
0 10 20 30 40 50 60 70
TEMPERATURE (°C)
1318 G01
RS422 Driver Differential Output
Swing vs Load Current
10
9
TA = 25°C
VCC = 5V
8
ILOAD FROM
TXD+ TO TXD–
7
6
5
4
3
2
1
0
0 10 20 30 40 50 60 70 80 90 100
LOAD CURRENT (mA)
1318 G04
RS232 Driver Slew Rate vs
Load Capacitance
25
TA = 25°C
VCC = 5V
20
SR–
15
SR+
10
5
0
10
100
1000
10000
CAPACITANCE (pF)
1318 G07
Charge Pump Output Voltage
vs Load Current
10
8
V+
6
4
2 TA = 25°C
0
–2
VCC =
ILOAD
5V
= V+
TO
V–
–4
–6
V–
–8
–10
0
3
6
9
12
15
LOAD CURRENT (mA)
1318 G02
RS422 Driver Single-Ended
Output Swing vs Load Current
5.0
4.5
TA = 25°C
VCC = 5V
4.0
ILOAD FROM TXD+,
TXD– TO GND
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0 10 20 30 40 50 60 70 80 90 100
LOAD CURRENT (mA)
1318 G05
RS232 Driver Output Swing vs
Resistive Load
10
8
POSITIVE SWING
6
4
2
0
TA = 25°C
VCC = 5V
–2
–4
–6
NEGATIVE SWING
–8
–10
1
2
3 4 5 6 7 8 9 10
RESISTIVE LOAD (kΩ)
1318 G08
TTL Input Threshold
vs Temperature
2.4
VCC = 5V
2.2
2.0
INPUT HIGH (TXI1, TXI2)
1.8
INPUT HIGH (TXD)
1.6
1.4
INPUT LOW (TXD)
1.2 INPUT LOW (TXI1, TXI2)
1.0
0.8
0 10
20 30 40 50 60 70
TEMPERATURE (°C)
1318 G03
RS422 Driver Short-Circuit
Current vs Temperature
100
98 VCC = 5V
96
94
ISC+
92
ISC–
90
88
86
84
82
80
0 10 20 30 40 50 60 70
TEMPERATURE (°C)
1318 G06
RS232 Driver Short-Circuit
Current vs Temperature
20.0
19.5 VCC = 5V
19.0
18.5
18.0
ISC–
17.5
17.0
ISC+
16.5
16.0
15.5
15.0
0 10 20 30 40 50 60 70
TEMPERATURE (°C)
1318 G09
4
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