7.10 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 TMUX7462F's drain pin (D or Dx).

Figure 7-11 shows the setup used to measure bandwidth of the switch.

$=J@SE@PD = 20 × .KC

GND

Dx

50Ÿ

Network Analyzer

SW

50Ÿ

Other

Sx/ Dx

pins

0.1 µF

GND

0.1 µF

GND

0.1 µF

GND

0.1 µF

GND

Figure 7-11. Bandwidth Measurement Setup

7.11 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

multiplexer output. The on-resistance of the TMUX7462F 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 7-12 shows the setup used to measure THD+N of the devices.

GND

Dx

Audio Precision

SW

50Ÿ

Other

Sx/ Dx

pins

0.1 µF

GND

0.1 µF

GND

0.1 µF

GND

0.1 µF

GND

Figure 7-12. THD+N Measurement Setup

TMUX7462F

SCDS394A – MARCH 2021 – REVISED OCTOBER 2021

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