Precision, Quad, SPST Analog Switches
MAX391/MAX392/MAX393
______________________________________________Test Circuits/Timing Diagrams
MAX391
MAX392
MAX393
SWITCH
INPUT
V
COM
COM
+5V
V+
NO
or NC
R
L
300Ω
GND
0V
V-
-5V
SWITCH
OUTPUT
0V
t
ON
SWITCH
OUTPUT
V
OUT
C
L
35pF
LOGIC
INPUT
+3V
50%
0V
t r < 20ns
t f < 20ns
IN
LOGIC
INPUT
t
OFF
V
OUT
0.9 x V
0UT
0.9 x V
OUT
C
L
INCLUDES FIXTURE AND STRAY CAPACITANCE.
R
L
V
OUT
= V
COM
R
L
+ R
ON
(
)
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
Figure 2. Switching Time
MAX393
COM1
COM2
IN
LOGIC
INPUT
GND
+5V
V+
LOGIC
INPUT
NO
NC
R
L2
V
OUT2
C
L2
R
L1
V
OUT1
C
L1
SWITCH
OUTPUT 1
(V
OUT1
)
SWITCH
OUTPUT 2
(V
OUT2
)
R
L
= 300Ω
C
L
= 35pF
+3V
50%
0V
0.9 x V
0UT1
0V
V
COM1
= +3V
V
COM2
= +3V
V-
-5V
0.9 x V
OUT2
0V
t
D
t
D
C
L
INCLUDES FIXTURE AND STRAY CAPACITANCE.
Figure 3. Break-Before-Make Interval (MAX393 only)
MAX391
MAX392
MAX393
R
GEN
COM
+5V
V+
V
OUT
NC or
NO
C
L
GND
IN
V-
V
OUT
IN
OFF
ON
∆V
OUT
V
GEN
OFF
-5V
V
IN
= +3V
IN
OFF
ON
Q = (∆V
OUT
)(C
L
)
OFF
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 4. Charge Injection
8
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
