MUX508IPWR.B datasheet(22/42 Pages) TI2

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VDD

VSS

GND

0.1 µF

Audio Precision

VOUT

5 Vrms

NŸ

VIN

0.1 µF

Attenuation

20 Log

Network Analyzer

VOUT

VDD

VSS

0.1 µF

GND

MUX508, MUX509

SBAS758C – JANUARY 2016 – REVISED SEPTEMBER 2016

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8.11 Bandwidth

Bandwidth is defined as the range of frequencies that are attenuated by < 3 dB when the input is applied to the

source pin of an on-channel and the output is measured at the drain pin of the MUX50x. Figure 35 shows the

setup used to measure bandwidth of the mux. Use Equation 4 to compute the attenuation.

Figure 35. Bandwidth Measurement Setup

(4)

8.12 THD + Noise

The total harmonic distortion (THD) of a signal 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 MUX50x

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 36 shows the setup used to

measure the THD+N of the MUX50x.

Figure 36. THD+N Measurement Setup

MUX508IPWR.B Datasheet(PDF) 22 Page - Texas Instruments