Datasheet

Low-Voltage 3.5
ΩΩ
, SPDT,
CMOS Analog Switches
Maxim Integrated 7
MAX4729/MAX4730
MEASUREMENTS ARE STANDARDIZED AGAINST
SHORT AT SOCKET TERMINALS. OFF-ISOLATION IS
MEASURED BETWEEN COM AND “OFF” NO OR NC
TERMINAL ON EACH SWITCH. ON-LOSS IS MEASURED
BETWEEN COM AND “ON” TERMINAL ON EACH SWITCH.
CROSSTALK IS MEASURED FROM ONE CHANNEL TO ALL
OTHER CHANNELS. SIGNAL DIRECTION THROUGH SWITCH
IS REVERSED; WORST VALUES ARE RECORDED.
V+
V+
V
MEAS
GND
V+
IN
NO
OR
NC
COM
V
IN
MAX4729
MAX4730
ON-LOSS = 20log
V
MEAS
V
REF
CROSSTALK = 20log
V
MEAS
V
REF
NETWORK
ANALYZER
50Ω
50Ω 50Ω
50Ω
MEAS REF
0.1μF
50Ω
V
REF
OFF-ISOLATION = 20log
V
MEAS
V
REF
Figure 2. Off-Isolation/On-Loss Bandwidth, Crosstalk
V
GEN
GND
C
L
V
OUT
V+
V
OUT
ΔV
OUT
Q = (ΔV
OUT
)(C
L
)
COM
SWITCH
INPUT
ON
0V
V+
OFFOFF
IN
V+
R
GEN
IN
MAX4729
MAX4730
SWITCH
OUTPUT
LOGIC INPUT (0 TO V+)
NO
OR NC
Figure 3. Charge Injection
V+
GND
V+
IN
NO
OR
NC
COM
MAX4729
MAX4730
AS
REQUIRED
f = 1MHz
CAPACITANCE
ANALYZER
Figure 4. NO, NC, and COM Capacitance