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TS4621B Datasheet(PDF) 41 Page - STMicroelectronics

No. de pieza TS4621B
Descripción Electrónicos  High-performance class-G stereo headphone amplifier with I2C volume control
PDF  48 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TS4621B Datasheet(HTML) 41 Page - STMicroelectronics

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TS4621B
Application information
Doc ID 022194 Rev 2
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4.7.1
Common mode sense layout
The TS4621B 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 TS4621B 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 TS4621B outputs.
Figure 83.
Common mode sense layout example
Common mode
sense pin
Output jack
connector
Ground plane



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