TMUX7436F datasheet(33/50 Pages) TI2

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7.15 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) of the device. Figure 7-17

shows the setup used to measure bandwidth of the switch.

GND

VSIG

VOUT

Network Analyzer

VDD

VSS

VDD

VSS

0.1 µF

SxA / SxB / Dx

Figure 7-17. Bandwidth Measurement Setup

7.16 THD + Noise

The total harmonic distortion (THD) of a signal is a measurement of the harmonic distortion, and is defined

as the ratio of the sum of the powers of all harmonic components to the power of the fundamental frequency

at the switch output. The on-resistance of the device varies with the amplitude of the input signal and results

in distortion when the drain pin is connected to a low-impedance load. Total harmonic distortion plus noise is

denoted as THD+N. Figure 7-18 shows the setup used to measure THD+N of the devices.

GND

Audio Precision

VOUT

VDD

VSS

VDD

VSS

0.1 µF

SxA / SxB / Dx

Figure 7-18. THD+N Measurement Setup

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TMUX7436F

SCDS459A – OCTOBER 2022 – REVISED NOVEMBER 2022

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TMUX7436F Datasheet(PDF) 33 Page - Texas Instruments