Improved, 8-Channel/Dual 4-Channel,
CMOS Analog Multiplexers
_________________________________Test Circuits/Timing Diagrams (continued)
+15V
+15V
10nF
V
IN
S1
R
S
= 50Ω
S8
A0
A1
A2
GND
EN
V-
D
V
OUT
R
L
= 1kΩ
R
S
= 50Ω
V+
10nF
DG408/DG409
V
IN
S1
S2
S8
A0
A1
A2
GND
V+
EN
+2.4V
DG408
D
V
OUT
R
L
= 1kΩ
V-
DG408
10nF
-15V
V
OUT
V
IN
10nF
-15V
OFF ISOLATION = 20log
CROSSTALK = 20log
V
OUT
V
IN
Figure 6. Off Isolation
Figure 7. Crosstalk
+15V
V+
A2
CHANNEL
SELECT
A1
A0
D
GND
EN
V-
f = 1MHz
S1
Meter
Impedance
Analyzer
or Equivalent
DG408
S8
-15V
Figure 8. Source/Drain Capacitance
_______________________________________________________________________________________
9