Datasheet

MAX398/MAX399
Precision, 8-Channel/Dual 4-Channel,
Low-Voltage, CMOS Analog Multiplexers
10 ______________________________________________________________________________________
ΔV
OUT
+3V
0
LOGIC
INPUT
V
EN
+5V
V
OUT
-5V
GND
V+
A1
V-
A0
A2
EN
COM
MAX398
C
L
= 1000nF
V
OUT
NO
CHANNEL
SELECT
R
S
V
S
ONOFF OFF
ΔV
OUT
IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER
ERROR Q WHEN THE CHANNEL TURNS OFF.
Q = ΔV
OUT
x C
L
V
EN
Figure 5. Charge Injection
Test Circuits/Timing Diagrams (continued)
+5V
V
OUT
-5V
GND
V+
A1
V-
A0
A2
NO8
COM
MAX398
NO1
R
S
= 50Ω
V
IN
EN
10nF
R
L
= 1kΩ
OFF-ISOLATION = 20log
V
OUT
V
IN
10nF
+5V
V
OUT
-5V
GND
V+
A1
V-
A0
A2
NO8
COM
MAX398
NO2
R
G
= 50Ω
V
IN
EN
10nF
R
L
= 1kΩ
CROSSTALK = 20log
V
OUT
V
IN
10nF
NO1
R = 1kΩ
+5V
-5V
GND
V+
A2
V-
A1
A0
NO8
MAX398
CHANNEL
SELECT
NO1
COM
EN
1MHz
CAPACITANCE
ANALYZER
f = 1MHz
Figure 6. Off-Isolation Figure 7. Crosstalk
Figure 8. NO/COM Capacitance