Datasheet

MAX4664/MAX4665/MAX4666
5 Ω , Quad, SPST,
CMOS Analog Switches
_______________________________________________________________________________________ 9
t
r
< 20ns
t
f
< 20ns
50%
0
LOGIC
INPUT
V-
-15V
R
L
100Ω
NO_
OR NC_
GND
C
L
INCLUDES FIXTURE AND STRAY CAPACITANCE.
V
O
= V
COM (
R
L
)
R
L
+ R
ON
SWITCH
INPUT
IN_
+3V
t
OFF
0
COM_
SWITCH
OUTPUT
0.9V
0
0.9V
0
t
ON
V
O
SWITCH
OUTPUT
LOGIC
INPUT
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
V
L
V+
C
L
35pF
+5V
+15V
V
O
V
COM_
0
REPEAT TEST FOR EACH SWITCH. FOR LOAD
CONDITIONS, SEE
Electrical Characteristics.
MAX4664
MAX4665
MAX4666
Figure 2. Switching-Time Test Circuit
Above 5MHz, circuit board layout becomes critical,
and it becomes difficult to characterize the response of
the switch independent of the circuit. The graphs
shown in the Typical Operating Characteristics were
taken using a 50Ω source and load connected with
BNC connectors to a circuit board deemed “average,”
that is, designed with isolation in mind, but not using
stripline or other special RF circuit techniques. For criti-
cal applications above 5MHz, use the MAX440,
MAX441, and MAX442, which are fully characterized
up to 160MHz.
V
GEN
GND
NC_ OR
C
L
V
O
-15V
V-
V+
V
O
V
IN
OFF
ON
OFF
∆V
O
Q = (∆V
O
)(C
L
)
COM_
+5V
V
IN
DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
OFF
ON
OFF
V
IN
V
IN
= +3V
+15V
R
GEN
IN_
V
L
MAX4664
MAX4665
MAX4666
NO_
Figure 3. Charge-Injection Test Circuit