MAX391 Maxim, MAX391 Datasheet - Page 8

• Manufacturer Part Number: MAX391
• Description: The MAX391/MAX392/MAX393 are precision, quad, single-pole/single-throw (SPST) analog switches designed to operate at +3V, +5V, or ±5V
• Manufacturer: Maxim

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