High-Speed, Low-Voltage, 4Ω, Dual SPST
CMOS Analog Switches
V+ 0.1µF
V+ NO_
OR
NC_
*
MAX4641
MAX4642
V+
MAX4643 COM_
IN_
GND
NETWORK
ANALYZER
VIN 50Ω
50Ω
VOUT
MEAS
REF
50Ω 50Ω
MEASUREMENTS ARE STANDARDIZED AGAINST
SHORT AT SOCKET TERMINALS. OFF-ISOLATION IS
MEASURED BETWEEN COM AND “OFF” TERMINAL
ON EACH SWITCH. ON-LOSS IS MEASURED BETWEEN
COM AND “ON” TERMINAL ON EACH SWITCH. SIGNAL
DIRECTION THROUGH SWITCH IS REVERSED; WORST
VALUES ARE RECORDED.
OFF-ISOLATION =
20log
VOUT
VIN
ON-LOSS = 20log VOUT
VIN
* ADD 50Ω TERMINATION FOR
OFF-ISOLATION
Figure 3. Off-Isolation, On-Loss, and Crosstalk
V+
V+
NO_
OR
NC_
MAX4641
MAX4642
VIN
IN_ MAX4643 COM_
GND
50Ω
VNO_ OR VNC_ = 0V
VOUT
CL
1000pF
V+
AS
REQUIRED
V+
NO_
OR
NC_
MAX4641
MAX4642
IN_ MAX4643 COM_
GND
1MHz
CAPACITANCE
ANALYZER
V+
VIN
0
VOUT
MAX4641
MAX4642
∆VOUT
∆VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER
ERROR Q WHEN THE CHANNEL TURNS OFF.
Q = ∆VOUT x CL
Figure 5. NO_, NC_, and COM_ Capacitance
Chip Information
TRANSISTOR COUNT: 105
Figure 4. Charge Injection
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