OUT

S

V

Channel-to-Channel Crosstalk

20 Log

V

§

·

˜

¨

¸

©

¹

NETWORK

ANALYZER

GND

S1

S2

50Q

50Q

D

50Q

0.1µF

OUT

S

V

Off Isolation

20 Log

V

§

·

˜

¨

¸

©

¹

GND

NETWORK

ANALYZER

S

D

50Q

50Q

50Q

0.1µF

16

TMUX1237

SCDS424A – DECEMBER 2019 – REVISED MARCH 2020

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Copyright © 2019–2020, Texas Instruments Incorporated

7.7 Off Isolation

Off isolation is defined as the ratio of the signal at the drain pin (D) of the device when a signal is applied to the

source pin (Sx) of an off-channel. Figure 13 shows the setup used to measure, and the equation used to

calculate off isolation.

Figure 13. Off Isolation Measurement Setup

(1)

7.8 Crosstalk

Crosstalk is defined as the ratio of the signal at the drain pin (D) of a different channel, when a signal is applied

at the source pin (Sx) of an on-channel. Figure 14 shows the setup used to measure, and the equation used to

calculate crosstalk.

Figure 14. Crosstalk Measurement Setup

(2)