7.9 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 7-9 shows the setup used to measure, and the equation used to

calculate crosstalk.

GND

S1

S2

Network Analyzer

VDD

VSS

VDD

VSS

0.1 µF

0.1 µF

50

D2

VOUT

VSIG

50

50

Vs

50

D1

Crosstalk = 20 × Log

VOUT

VS

Figure 7-9. Crosstalk Measurement Setup

7.10 Bandwidth

Bandwidth is defined as the range of frequencies that are attenuated by less than 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) of the device. The

characteristic impedance, Z0, for the measurement is 50 Ω. Figure 7-10 shows the setup used to measure

bandwidth.

GND

Sx

Dx

VSIG

VOUT

50Ÿ

50Ÿ

Network Analyzer

VDD

VSS

VDD

VSS

0.1 µF

0.1 µF

VS

$=J@SE@PD = 20 × .KC

8176

85

Figure 7-10. Bandwidth Measurement Setup

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SCDS444 – FEBRUARY 2023

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