11
1
2
8
7
0.1 µF
20 kΩ
20 kΩ
I
F
V
CM
+
V
= 15 V
CC
–
A
B
V
δV
δt
CM
∆t
=
3
4
6
5
V
OUT
100 pF*
OV
∆t
+
–
SHIELD
V
FF
*100 pF TOTAL
CAPACITANCE
V
O
V
V
CC
SWITCH AT A: I = 0 mA
F
V
O
+
OL
SWITCH AT B: I = 10 mA
F
V
= 1000 V
CM
Figure 6. CMR Test Circuit. Typical CMR Waveform.
600
600
800
I
V
= 10 mA
= 15 V
I
V
= 10 mA
= 15 V
F
CC
F
CC
I
V
= 10 mA
= 15 V
CL = 100 pF
RL = 20 kΩ (INTERNAL)
CL = 100 pF
RL = 20 kΩ (EXTERNAL)
F
500
400
500
400
CC
CL = 100 pF
= 25 °C
600
400
200
T
A
t
t
t
t
t
t
PLH
PHL
PLH
PHL
PLH
PHL
300
200
100
300
200
100
20
RL – LOAD RESISTANCE – K Ω
0
10
30
40
50
-60 -40 -20
0
20 40 60 80 100120140
-60 -40 -20
0
20 40 60 80 100120140
T – TEMPERATURE – °C
A
T
– TEMPERATURE – °C
A
Figure 7. Propagation Delay with
External 20 kΩ RL vs. Temperature.
Figure 8. Propagation Delay with
Internal 20 kΩ RL vs. Temperature.
Figure 9. Propagation Delay vs. Load
Resistance.
1400
1400
1200
1000
800
I
= 10 mA
I
= 10 mA
= 15 V
F
F
CL = 100 pF
RL = 20 kΩ
T
V
CC
RL = 20 kΩ
1200
1000
800
= 25°C
T
= 25°C
A
A
t
t
PLH
PLH
t
t
PHL
PHL
600
600
400
400
200
0
200
0
5
10
15
20
25
30
0
100
200
300
400
500
V
– SUPPLY VOLTAGE – V
CL – LOAD CAPACITANCE – pF
CC
Figure 11. Propagation Delay vs.
Supply Voltage.
Figure 10. Propagation Delay vs. Load
Capacitance.
HP [ HEWLETT-PACKARD ]
