LH1540AAB, LH1540AABTR, LH1540AT
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Vishay Semiconductors
40
80
Change in Current Limit (%)
Normalized to 25 °C
30
20
10
0
- 10
- 20
- 30
- 40
- 40
- 20
0
Capacitance (pF)
I
F
= 5.0 mA
t = 5.0 ms
V
L
= see elec. char.
70
60
50
40
30
20
10
0
I
F
= 0 mA
f = 1.0 MHz
20
40
60
80
0
i1540at_07
20
40
60
80
100
i1540at_04
Ambient Temperature (°C)
Fig. 5 - Current Limit vs. Temperature
Applied Voltage (V)
Fig. 8 - Switch Capacitance vs. Applied Voltage
50
0.30
I
L
= 50 mA
0.25
R
L
= 600
Ω
Change in On-resistance (%)
Normalized to 25 °C
40
30
20
10
0
- 10
- 20
- 30
Insertion Loss (dB)
0.20
0.15
0.10
0.05
0
10
2
- 40
- 40
i1540at_05
- 20
0
20
40
60
80
10
3
10
4
10
5
Ambient Temperature (°C)
Fig. 6 - On-resistance vs. Temperature
i1540at_08
Frequency (Hz)
Fig. 9 - Insertion Loss vs. Frequency
AC/DC On-resistance Variation (%)
Normalized to Datasheet R
on
Specification at I
F
= 5.0 mA
1.5
I
L
= 50 mA
1.0
100
80
Isolation (dB)
60
V
P
= 10 V
R
L
= 50
Ω
40
20
0
10
2
0.5
0
- 0.5
0
4
8
12
16
20
10
3
10
4
10
5
10
6
10
7
i1540at_06
LED Forward Current (mA)
i1540at_09
Frequency (Hz)
Fig. 10 - Output Isolation
Fig. 7 - Variation in On-resistance vs. LED Current
Rev. 1.9, 25-Jul-11
4
For technical questions, contact:
optocoupleranswers@vishay.com
Document Number: 83833
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