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3.4.2
Design Guide
There are three audio channels in SIM5215&SIM5216
,
including speaker output , receiver output and
microphone input.
SPEAKER circuit in SIM5215&SIM5216 is a Class-D amplifier, optional EMI filter is shown in the
following figure; these components (two ferrite beads and two capacitors) can reduce electromagnetic
interference. If used, they should be located beside SPK_P and SPK_N pins. Considerable current flows in
the channels, so wider PCB traces are recommended (~ 20 mils).
Figure 22: Speaker interface configuration
EAR_P
EAR_N
10pF
10pF
10pF
33pF
33pF
33pF
ESD
ANTI
ESD
ANTI
MODULE
The lines in bold type should
be accorded to differential
signal layout rules
These components should
be placed to speaker as
close as possible
Figure 23: Receiver interface configuration
SIM5215&SIM5216_Hardware Design_V2.02
2012-08-31
32
Содержание SIM5215
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