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TS4621E Datasheet(PDF) 27 Page - STMicroelectronics

Part # TS4621E
Description  High-performance class-G stereo headphone amplifier with I2C volume control
PDF  32 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TS4621E Datasheet(HTML) 27 Page - STMicroelectronics

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TS4621E
Application information
Doc ID 022201 Rev 1
27/32
4.3
Common mode sense
The TS4621E implements a common-mode sense pin to correct any voltage differences
that might occur between the return of the headphone jack and the GND of the device and
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 TS4621E ground and the headphone ground. By way of the
frequency response of the common-mode sense pin, this noise is removed from the
TS4621E outputs.



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