OUT

S

V

Channel-to-Channel Crosstalk

20 Log

V

§

·

˜

¨

¸

©

¹

NETWORK

ANALYZER

VDD

0.1µF

VDD

GND

S1A

VSIG = 200 mVpp

VBIAS = VDD / 2

50Ÿ

VOUT

RL

D1

50Ÿ

S4A

50Ÿ

RL

D4

VS

SxA / SxB / Dx

50Ÿ

RL

50Ÿ

RL

OUT

S

V

Off Isolation

20 Log

V

§

·

˜

¨

¸

©

¹

GND

NETWORK

ANALYZER

VOUT

S

D

50Ÿ

VSIG

RL

50Ÿ

VS

VDD

0.1µF

SxA / SxB / Dx

RL

50Ÿ

20

TMUX1574

SCDS391C – OCTOBER 2018 – REVISED DECEMBER 2019

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Copyright © 2018–2019, Texas Instruments Incorporated

7.13 Off Isolation

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

source pin (Sx) of an off-channel. The characteristic impedance, Z0, for the measurement is 50 Ω. Figure 39

shows the setup used to measure off isolation. Use off isolation equation to compute off isolation.

Figure 39. Off Isolation Measurement Setup

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7.14 Channel-to-Channel Crosstalk

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

at the source pin (Sx) of an on-channel. The characteristic impedance, Z0, for the measurement is 50 Ω.

Figure 40 shows the setup used to measure, and the equation used to compute crosstalk.

Figure 40. Channel-to-Channel Crosstalk Measurement Setup

(2)