Figure 10. Propagation Delay vs. Load Capacitance.
Figure 12. Propagation Delay vs. Input Current.
Figure 11. Propagation Delay vs. Supply Voltage.
11
0.1 µF
V
CC
=15 V
20 k
Ω
6
5
4
1
3
SHIELD
CMOS
310
Ω
+5 V
V
OUT
100 pF
+
–
*100 pF TOTAL
CAPACITANCE
6
5
4
1
3
C
LEDP
C
LEDN
6
5
4
1
3
C
LEDP
C
LEDN
SHIELD
C
LED01
0.1 µF
V
CC
=15 V
20 k
Ω
6
5
4
1
3
SHIELD
CMOS
310
Ω
+5 V
V
OUT
100 pF
+
–
*100 pF TOTAL
CAPACITANCE
20 kΩ
6
5
4
1
3
* THE ARROWS INDICATE THE DIRECTION OF CURRENT
FLOW FOR +dV
CM
/dt TRANSIENTS.
300
Ω
V
OUT
100 pF
I
CLEDP
C
LEDN
SHIELD
C
LED01
+
–
I
TOTAL*
I
CLED01
I
F
V
CM
20 kΩ
6
5
4
1
3
* THE ARROWS INDICATE THE DIRECTION OF CURRENT
FLOW FOR +dV
CM
/dt TRANSIENTS.
** OPTIONAL CLAMPING DIODE FOR IMPROVED CMH
PERFORMANCE. V
R
< V
F (OFF)
DURING +dV
CM
/dt.
V
OUT
100 pF
C
LEDP
C
LEDN
SHIELD
C
LED01
+
–
I
CLEDN
*
300 Ω
+ V
R
** –
V
CM
Figure 14. Optocoupler Input to Output Capacitance Model for Unshielded Optocouplers.
Figure 13. Recommended LED Drive Circuit.
Figure 17. AC Equivalent Circuit for Figure 16 during Common Mode Transients.Figure 18. AC Equivalent Circuit for Figure 13 during Common Mode Transients.
Figure 15. Optocoupler Input to Output Capacitance Model for Shielded Optocouplers.Figure 16. LED Drive Circuit with Resistor Connected to LED Anode (Not Recommended).
12
6
5
4
1
3
SHIELD
Q1
+5 V
6
5
4
1
3
SHIELD
+5 V
0.1 µF
20 kΩ
6
5
4
1
3
SHIELD
CMOS
310
Ω
+5 V
V
OUT1
ACPL-M46U
I
LED1
V
CC1
0.1 µF
20 kΩ
6
5
4
1
3
SHIELD
CMOS
310
W
+5 V
V
OUT2
ACPL-M46U
I
LED2
V
CC2
M
Q2
Q1
-HV
+HV
IPM
ACPL-M46U
ACPL-M46U
ACPL-M46U
ACPL-M46U
ACPL-M46U
20 kΩ
6
5
4
1
3
* THE ARROWS INDICATE THE DIRECTION OF CURRENT
FLOW FOR +dV
CM
/dt TRANSIENTS.
V
OUT
100 pF
C
LEDP
C
LEDN
SHIELD
C
LED01
+
–
I
CLEDN*
Q1
V
CM
Figure 21. Recommended LED Drive Circuit for Ultra High CMR.
Figure 19. Not Recommended Open Collector LED Drive Circuit.Figure 20. AC Equivalent Circuit for Figure 19 during Common Mode Transients.