DG408, DG409
Test Circuits and Waveforms
+15V
+2.4V
EN
A
0
A
1
A
2
50
V+
S
1
8
+15V
+2.4V
10V
10V
SWITCH
OUTPUT
V
O
35pF
LOGIC
INPUT
50
EN
V+
S
1B
10V
10V
SWITCH
OUTPUT
V
O
35pF
GND
V-
D
300
A
1
GND
V-
D
B
300
-
15V
FIGURE 1A. DG408 TEST CIRCUIT
-
15V
FIGURE 1B. DG409 TEST CIRCUIT
t
r
< 20ns
t
f
< 20ns
50%
S
1
ON
0.8 V
S1
0.8 V
S8
t
TRANS
t
TRANS
50%
LOGIC
INPUT
3V
0V
V
S1
0V
V
S8
SWITCH
OUTPUT
V
O
S
8
ON
FIGURE 1C. MEASUREMENT POINTS
FIGURE 1. TRANSITION TIME
+15V
+15V
A
0
LOGIC
INPUT
A
1
V
IN
50
A
2
V+
DG408
S
2
- S
8
V-
D
S
1
-
5V
SWITCH
OUTPUT
V
O
300
35pF
LOGIC
INPUT
V
IN
50
EN GND
V+
S
1B
DG409
A
1
S
1A
- S
4A
S
2B -
S
4B,
D
A
EN GND V- D
B
A
0
300
-
15V
FIGURE 2A. DG408 TEST CIRCUIT
-
15V
FIGURE 2B. DG409 TEST CIRCUIT
LOGIC
INPUT
V
IN
3V
50%
0V
t
ON(EN)
50%
t
r
< 20ns
t
f
< 20ns
0V
SWITCH
OUTPUT
V
O
V
O
0.9 V
O
t
OFF(EN)
FIGURE 2C. MEASUREMENT POINTS
FIGURE 2. ENABLE SWITCHING TIMES
FN3283 Rev 8.00
Jun 13, 2006
LOGIC
INPUT
S
2
- S
7
DG408 S
S
1A
- S
4A,
D
A
A
0
DG409 S
4B
-
5V
SWITCH
OUTPUT
V
o
35pF
Page 6 of 17
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