8.7 Crosstalk

Crosstalk (XTALK) 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, ZO, for the measurement is 50 Ω,

as shown in Figure 8-7 and Equation 2.

INx

GND

VINx

SX

VS

VOUT

RS

50

Network Analyzer

VDD

VSS

VDD

VSS

GND

0.1 µF

GND

0.1 µF

50

50

50

Other

Sx/ Dx

pins

SW

SW

DX

SY

DY

Figure 8-7. Inter-channel Crosstalk Measurement Setup

Inter−cℎannel Crosstalk = 20 × Log VOUTVS

(2)

8.8 Bandwidth

Bandwidth (BW) is defined as the range of frequencies that are attenuated by < 3 dB when the input is applied to

the source pin (Sx) of an on-channel, and the output is measured at the drain pin (Dx). Figure 8-8 and Equation

3 shows the setup used to measure bandwidth of the switch.

SELx

GND

VSELx

SX

Dx

VS

VOUT

RS

50

Network Analyzer

VDD

VSS

VDD

VSS

GND

0.1 µF

GND

0.1 µF

SW

50

Other

Sx/ Dx

pins

Figure 8-8. Bandwidth Measurement Setup

Bandwidtℎ = 20 × Log VOUTVS

(3)

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SCDS434B – OCTOBER 2021 – REVISED MARCH 2023

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