sta335ml STMicroelectronics, sta335ml Datasheet - Page 15

• Manufacturer Part Number: sta335ml
• Description: 2-channel Microless High-efficiency Digital Audio System Sound Terminaltm
• Manufacturer: STMicroelectronics

STA335ML
Figure 12. Filterless output configuration
The filterless application is more critical in terms of EMI. It is quite important to follow the
suggestions below:
Figure 13. Filterless output configuration with snubber network
The presence of snubber networks reduce the EMI. The snubber networks should be placed
as close as possible to the IC.
Tracks from amplifier to speaker should be as short as possible.
Ferrite beads can be used (instead of coils) to improve EMI performance.
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Ferrite beads must have a low impedance in the audio band and high impedance
at high frequencies.
Place ferrite beads as close as possible to the IC.
Ferrite filters must reduce EMI above 1 MHz.
FCC and CE authorities test radiated emission above 30 MHz.
OUT1A
OUT1B
OUT2A
OUT2B
OUT1A
OUT1B
OUT2A
OUT2B
Doc ID 17638 Rev 3
330 pF
330 pF
22 R
22 R
Left
Right
Left
Right
Applications
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