LT1781 查看數據表（PDF） - Linear Technology
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LT1781 Datasheet PDF : 12 Pages
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LT1780/LT1781
TYPICAL PERFOR A CE CHARACTERISTICS
Driver Maximum Output Voltage
vs Load Capacitance
8.0
7.5
7.0
20k BAUD
6.5
60k BAUD
6.0
120k BAUD
5.5
5.0
01
2 345678
LOAD CAPACITANCE (nF)
9 10
1780 • G01
Driver Minimum Output Voltage
vs Load Capacitance
–4.0
–4.5
120k BAUD
–5.0
60k BAUD
–5.5
20k BAUD
–6.0
–6.5
–7.0
01
2 345678
LOAD CAPACITANCE (nF)
9 10
1780 • G02
Driver Output Voltage
10
8 RL = 3k
6
VCC = 5.5V
4
VCC = 5V
VCC = 4.5V
2
OUTPUT HIGH
0
OUTPUT LOW
–2
VCC = 4.5V
–4
VCC = 5V
VCC = 5.5V
–6
–8
–10
–55 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1780 • G03
Receiver Input Thresholds
3.00
2.75
2.50
2.25
2.00
INPUT HIGH
1.75
1.50
INPUT LOW
1.25
1.00
0.75
0.50
–55 –25
0 25 50 75 100 125
TEMPERATURE (°C)
1780 • G04
Supply Current vs Data Rate
50
2 DRIVERS ACTIVE
RL = 3k
40 CL = 2500pF
30
20
10
0
0 25 50 75 100 125 150
DATA RATE (kBAUD)
1780 • G05
4
ON/OFF Thresholds
3.0
2.5
2.0
ON THRESHOLD
1.5
1.0
OFF THRESHOLD
0.5
0
–55 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1780 • G06
Supply Current
25
20
2 DRIVERS LOADED RL = 3k
15
1 DRIVER LOADED RL = 3k
10
NO LOAD
5
0
–55 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1780 • G07
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