TMUX7308FRRPR datasheet(33/54 Pages) TI

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8.13 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 (D or Dx) of the TMUX730xF.

Figure 8-15 shows the setup used to measure bandwidth of the switch.

Ax, EN

GND

VAX

VEN

D/ DX

Other

Sx/ Dx

Pins

VOUT

N.C.

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VDD

VSS

VDD

VSS

GND

0.1 µF

GND

0.1 µF

Figure 8-15. Bandwidth Measurement Setup

8.14 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 TMUX7308F and TMUX7309F 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 8-16 shows the setup used to measure THD+N of

the devices.

Ax, EN

GND

VAX

VEN

D/ DX

Other

Sx/ Dx

Pins

Audio Precision

VOUT

N.C.

VDD

VSS

VDD

VSS

GND

0.1 µF

GND

0.1 µF

Figure 8-16. THD+N Measurement Setup

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TMUX7308F, TMUX7309F

SCDS403B – FEBRUARY 2021 – REVISED DECEMBER 2021

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