8-Channel/Dual 4-Channel,
Low-Leakage, CMOS Analog Multiplexers
_________________________________Test Circuits/Timing Diagrams (continued)
+15V
+2.4V
50Ω
V+
EN
NO1-NO8
+5V
A0
A1 MAX338
A2
GND
COM
V-
1kΩ
-15V
VOUT
10pF
LOGIC +3V
INPUT
0V
VOUT
SWITCH
OUTPUT
0V
tr < 20ns
50%
tf < 20ns
80%
tOPEN
Figure 4. Break-Before-Make Interval
+15V
RS
NO
V+
EN
VS
A0
CHANNEL
COM
SELECT
A1
A2 MAX338
GND
V-
-15V
+3V
LOGIC
INPUT
OFF
ON
OFF
0V
VOUT
CL = 100pF
VOUT
∆VOUT
∆VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER
ERROR Q WHEN THE CHANNEL TURNS OFF.
Q = CL x ∆VOUT
Figure 5. Charge Injection
8 _______________________________________________________________________________________