2

1

V

Attenuation

20 Log

V

§

·

˜

¨

¸

©

¹

SEL

GND

SA

D

SB

50

Ÿ

Network Analyzer

NC

50

Ÿ

OUT

S

V

Channel-to-Channel Crosstalk

20 Log

V

§

·

˜

¨

¸

©

¹

50

Ÿ

GND

S1A

D1

S1B

Network Analyzer

50

Ÿ

50

Ÿ

SEL

S2A

D2

S2B

50

Ÿ

N.C.

N.C.

16

TMUX6136

SCDS397 – NOVEMBER 2018

www.ti.com

Product Folder Links: TMUX6136

Submit Documentation Feedback

Copyright © 2018, Texas Instruments Incorporated

Overview (continued)

Figure 25. Inter-channel Crosstalk Measurement Setup

(3)

7.1.9 Bandwidth

Bandwidth 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) of the TMUX6136. Figure 26

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

Figure 26. Bandwidth Measurement Setup

(4)

7.1.10 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 TMUX6136 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.