TMUX7219 datasheet(26/51 Pages) TI2

26 / 51 page

6.13 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 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.

GND

Audio Precision

VOUT

VDD

VSS

VDD

VSS

0.1 µF

Other

Sx pins

Figure 6-13. THD + N Measurement Setup

6.14 Power Supply Rejection Ratio (PSRR)

PSRR measures the ability of a device to prevent noise and spurious signals that appear on the supply voltage

pin from coupling to the output of the switch. The DC voltage on the device supply is modulated by a sine wave

of 620 mVPP. The ratio of the amplitude of signal on the output to the amplitude of the modulated signal is the

ACPSRR. A high ratio represents a high degree of tolerance to supply rail variation.

This helps stabilize the supply and immediately filter as much of the supply noise as possible.

TMUX7219

SCDS407F – NOVEMBER 2020 – REVISED JULY 2024

www.ti.com

Submit Document Feedback

Product Folder Links: TMUX7219

TMUX7219 Datasheet(PDF) 26 Page - Texas Instruments