TS4621ML datasheet(35/40 Pages) STMICROELECTRONICS

Part #	TS4621ML

Description	High-performance class-G stereo headphone amplifier

PDF	40 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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35 / 40 page

TS4621ML

Application information

Doc ID 023181 Rev 1

35/40

4.6.1

Common-mode sense layout

The TS4621ML implements a common-mode sense pin to correct any voltage differences

that might occur between the return of the headphone jack and the AGND of the device that

can create parasitic noise in the headphone and/or line out.

The solution to strongly reduce and practically eliminate this noise consists in connecting

the headphone jack ground to the CMS pin. This pin senses the difference of potential

(voltage noise) between the TS4621ML ground and the headphone ground. Thanks to the

frequency response and the attenuation of the common-mode sense pin, this noise is

removed from the TS4621ML outputs.

Figure 72.

Common-mode sense layout example

Common mode

sense pin

Output jack

connector

Ground plane

TS4621ML Datasheet(PDF) 35 Page - STMicroelectronics