Datasheet

7
FIGURE 3A. TEST CIRCUIT FIGURE 3B. MEASUREMENT POINTS
FIGURE 3. BREAK-BEFORE-MAKE INTERVAL
FIGURE 4A. TEST CIRCUIT FIGURE 4B. MEASUREMENT POINTS
FIGURE 4. CHARGE INJECTION
FIGURE 5. OFF ISOLATION FIGURE 6. CROSSTALK
Test Circuits and Waveforms (Continued)
EN
A
0
DG408
GND
A
1
A
2
ALL S AND D
A
D, D
B
V-
V+
+5V (V
S
)
SWITCH
OUTPUT
V
O
35pF300Ω50Ω
+15V
+2.4V
-15V
LOGIC
INPUT
DG409
LOGIC
INPUT
SWITCH
OUTPUT
V
O
3V
V
S
80%
t
r
< 20ns
t
f
< 20ns
t
OPEN
0V
0V
80%
S
X
A
0
GND
A
1
EN
D
V-
V+
V
O
C
L
+15V
-15V
A
2
10nF
V
GEN
CHANNEL
SELECT
R
GEN
LOGIC INPUT
LOGIC
INPUT
SWITCH
OUTPUT
∆V
O
3V
ON
OFF
0V
∆V
O
IS THE MEASURED VOLTAGE DUE
TO CHARGE TRANSFER ERROR, Q
Q = C
L
x ∆V
O
S
X
A
2
GND
A
1
EN
D
V
-
V+
V
O
+15V
-15V
A
0
SIGNAL
GENERATOR
V
IN
0V
1kΩ
ANALYZER
|
|
S
8
OFF ISOLATION 20 Log
V
OUT
V
IN
-----------------=
S
X
A
2
GND
A
1
EN
D
V
-
V+
V
O
+15V
-15V
A
0
SIGNAL
GENERATOR
V
IN
5V
1kΩ
ANALYZER
|
|
S
8
CROSSTALK 20 Log
V
OUT
V
IN
-----------------=
S
1
1kΩ
DG408, DG409