High-Speed, Low-Voltage, 4

Ω,

SPDT CMOS Analog Switch

_______________________________________________________________________________________

9

Figure 5. NO, NC, and COM Capacitance

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.

V+

V+

GND

V+

IN

NO

OR

NC

COM

MAX4644

OFF-ISOLATION = 20log

ON-LOSS = 20log

NETWORK

ANALYZER

50

Ω

50

Ω

50

Ω

50

Ω

MEAS

REF

0.1

μF

50

Ω

Figure 3. Off-Isolation and On-Loss

V+

0

ERROR Q WHEN THE CHANNEL TURNS OFF.

Q =

V+

GND

V+

IN

NO

OR

NC

COM

50

Ω

MAX4644

1000pF

V+

GND

V+

IN

NO

OR

NC

COM

MAX4644

AS

REQUIRED

1MHz

CAPACITANCE

ANALYZER

Figure 4. Charge Injection