15
FN8038.5
May 13, 2010
Typical Performance Curves VCC = 3.3V, TA = +25°C
FIGURE 17. ISL4238E TRANSMITTER OUTPUT VOLTAGE vs
LOAD CAPACITANCE
FIGURE 18. ISL4244E TRANSMITTER OUTPUT VOLTAGE vs
LOAD CAPACITANCE
FIGURE 19. ISL4245E TRANSMITTER OUTPUT VOLTAGE vs
LOAD CAPACITANCE
FIGURE 20. ISL4238E SUPPLY CURRENT vs LOAD
CAPACITANCE WHEN TRANSMITTING DATA
FIGURE 21. ISL4244E SUPPLY CURRENT vs LOAD
CAPACITANCE WHEN TRANSMITTING DATA
FIGURE 22. ISL4245E SUPPLY CURRENT vs LOAD
CAPACITANCE WHEN TRANSMITTING DATA
-6
-4
-2
0
2
4
6
1000
2000
3000
4000
5000
0
LOAD CAPACITANCE (pF)
TRAN
SMI
TTER
O
U
TPUT
VO
LTAG
E
(V)
1 TRANSMITTER AT 250kbps
VOUT+
VOUT -
OTHER TRANSMITTERS AT 30kbps
-6
-4
-2
0
2
4
6
1000
2000
3000
4000
5000
0
LOAD CAPACITANCE (pF)
TRANSMIT
T
E
R
OUTPUT
VOLTAGE
(V
)
1 TRANSMITTER AT 250kbps
VOUT+
VOUT -
OTHER TRANSMITTERS AT 30kbps
-6
-4
-2
0
2
4
6
1000
2000
3000
4000
5000
0
LOAD CAPACITANCE (pF)
TRA
N
SMI
TTER
O
U
TPUT
VO
LTAG
E
(V)
1 TRANSMITTER AT 1Mbps
VOUT+
VOUT -
OTHER TRANSMITTERS AT 30kbps
20
25
30
35
40
55
45
50
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
SUP
P
LY
C
URRENT
(m
A)
20kbps
250kbps
120kbps
1 TRANSMITTER AT INDICATED RATE
10
15
20
25
30
45
35
40
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
SUPP
L
Y
CURRENT
(m
A)
20kbps
250kbps
120kbps
1 TRANSMITTER AT INDICATED RATE
10
20
30
40
50
80
60
70
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
SUPP
LY
CURRENT
(m
A)
120kbps
1Mbps
250kbps
90
1 TRANSMITTER AT INDICATED RATE
ISL4238E, ISL4244E, ISL4245E