2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
3.0
2.0
100
80
+85 °C
+25 °C
1.4
1.0
0.8
60
0
-40 °C
-1.0
-2.0
-3.0
-4.0
-5.0
-7.0
40
20
10
0
0
10 20 30 40 50 60 70 80 90 100
– FORWARD CURRENT – mA
I
F
2.2
1.8
2.0
1.2
1.4
1.6
VI - FORWARD VOLTAGE - V
Figure 9. Forward Voltage and Current
Characteristics.
Figure 10. Normalized Transmitter Output vs.
Forward Current.
+5 V
0.1 µF
+
4.7 µF
¼
Ry
12, 13
74F3037
2
1
3
15
14
RX2
RX3
RX4
RX1
16
4, 5
¼ 74F3037
C
10
11
¼ 74F3037
9
5
HFBR-14x2/x4
8
7
¼ 74F3037
Figure 11. Recommended Drive Circuit.
HP8082A
PULSE
GENERATOR
SILICON
AVALANCHE
PHOTODIODE
50 Ω
TEST
HEAD
HIGH SPEED
OSCILLOSCOPE
50 Ω
LOAD
RESISTOR
Figure 12. Test Circuit for Measuring t , t .
r
f
19