MAX4666 Maxim, MAX4666 Datasheet - Page 9

• Manufacturer Part Number: MAX4666
• Description: The MAX4664/MAX4665/MAX4666 quad analog switches feature 5Ω max on-resistance
• Manufacturer: Maxim

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,”
Figure 2. Switching-Time Test Circuit
Figure 3. Charge-Injection Test Circuit
SWITCH
LOGIC
INPUT
INPUT
V
MAX4664
MAX4665
MAX4666
GEN
V
COM_
REPEAT TEST FOR EACH SWITCH. FOR LOAD
CONDITIONS, SEE Electrical Characteristics.
C
V
R
L
O
_______________________________________________________________________________________
GEN
INCLUDES FIXTURE AND STRAY CAPACITANCE.
= V
COM_
IN_
+5V
GND
COM
V
0
L
(
COM_
R
GND
L
+5V
V
R
+ R
L
L
ON
)
OR NC_
+15V
-15V
V+
V-
IN_
NO_
V
IN
= +3V
NC_ OR
+15V
-15V
V+
V-
NO_
R
100
L
SWITCH
OUTPUT
C
C
35pF
L
L
V
V
O
O
CMOS Analog Switches
SWITCH
OUTPUT
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.
LOGIC
INPUT
V
V
V
IN
O
IN
+3V
0
0
OFF
OFF
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
V
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
IN
DEPENDS ON SWITCH CONFIGURATION;
5 Ω , Quad, SPST,
t
ON
50%
V
O
0.9V
Q = ( V
0
ON
ON
O
)(C
L
t
)
OFF
t r < 20ns
t f < 20ns
0.9V
V
0
O
OFF
OFF
MAX4664
MAX4665
MAX4666
9