330 pF
5.11 K
+15 V
+5 V
0.1 µF
78L05
HCPL-7800
0.1 µF
8
7
1
2
3
4
IN
OUT
1.00 K
1.00 K
-
V
OUT
0.1 µF
0.1 µF
6
5
OP-42
0.1 µF
+
9 V
5.11 K
330 pF
PULSE GEN.
-15 V
-
+
V
IM
Figure 19. Isolation Mode Rejection Test Circuit.
10
DELAY TO 90%
RISE/FALL TIME
DELAY TO 50%
DELAY TO 10%
8
6
1000 V
0 V
V
IM
4
2
0
50 mV PERTURBATION
(DEFINITION OF FAILURE)
-40
-20
0
20
40
60
80 100
0 V
V
O
T
– TEMPERATURE – °C
A
Figure 20. Typical IMR Failure Waveform.
Figure 21. Typical Propagation Delays
and Rise/Fall Time vs. Temperature.
1-227