Datasheet

6
LTC1321/LTC1322/LTC1335
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
RS485 Receiver t
PLH
– t
PHL

vs Temperature
Receiver Output Low Voltage
vs Temperature
OUTPUT VOLTAGE (V)
0 0.5
OUTPUT CURRENT (mA)
1.0 2.01.5
2.5
3.0
1321 G14
40
35
30
25
20
15
10
5
0
T
A
= 25°C
Receiver Output Current
vs Output Low Voltage
EIA562 Receiver Input Threshold
Voltage vs Temperature
TEMPERATURE (°C)
–50
INPUT THRESHOLD VOLTAGE (V)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
25 75
1321 G15
–25 0
50 100 125
INPUT HIGH
INPUT LOW
TEMPERATURE (°C)
–50
SUPPLY CURRENT (µA)
500
450
400
350
300
250
200
150
100
50
0
0
50
75
1321 G18
–25
25
100
125
I
CC
–I
EE
–I
DD
R
L
= ∞
Supply Current in EIA562 Mode
vs Temperature (Both Ports)
Supply Current in RS485 Mode
vs Temperature (Both Ports)
TEMPERATURE (°C)
–50
SUPPLY CURRENT (mA)
1.2
1.0
0.8
0.6
0.4
0.2
0
25 75
1321 G17
–25 0
50 100 125
I
CC
–I
EE
–I
DD
R
L
= ∞
TEMPERATURE (°C)
–50
TIME (ns)
20
18
16
14
12
10
8
6
4
2
0
0
50
75
1321 G12
–25
25
100
125
TEMPERATURE (°C)
–50
OUTPUT VOLTAGE (V)
0.5
0.4
0.3
0.2
0.1
0
0
50
75
1321 G11
–25
25
100
125
I
OUT
= 3mA
TEMPERATURE (°C)
–50
OUTPUT LEAKAGE CURRENT (µA)
100
1321 G06
050
±400
±350
±300
±250
±200
±150
±100
±50
0
–25 25 75 125
Driver Output Leakage Current
(Disable/Shutdown) vs Temperature
OUTPUT VOLTAGE (V)
2.0
OUTPUT CURRENT (mA)
2.5
3.0
3.5 4.0
1321 G13
4.5
120
18
16
14
12
10
8
6
4
2
0
5.0
T
A
= 25°C
Receiver Output Current
vs Output High Voltage
Receiver Output High Voltage
vs Temperature
TEMPERATURE (°C)
–50
OUTPUT VOLTAGE (V)
5.0
4.9
4.8
4.7
4.6
4.5
4.4
4.3
4.2
4.1
4.0
0
50
75
1321 G10
–25
25
100
125
I
OUT
= 3mA