SELx

GND

Sx

10

N Ÿ

Audio Precision

Dx

2

1

V

Attenuation

20 Log

V

§

·

˜

¨

¸

©

¹

SELx

GND

Sx

50

Ÿ

Network Analyzer

Dx

13

TMUX6111, TMUX6112, TMUX6113

www.ti.com

SCDS383 – AUGUST 2018

Product Folder Links: TMUX6111 TMUX6112 TMUX6113

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Copyright © 2018, Texas Instruments Incorporated

Overview (continued)

Figure 9. Bandwidth Measurement Setup

(4)

9.1.10 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 mux

output. The on-resistance of the TMUX611x 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 10 shows the setup used to measure THD+N of the TMUX611x.

Figure 10. THD+N Measurement Setup