Specifications

M80 Hardware Design
M80_HD_V1.0 - 57 -
SPK2P
AGND
Differential layout
Amplifier
circuit
10pF
10pF
33pF
33pF
Close to speaker
GND
GND
ESD
ANTI
ESD
ANTI
Module
C2
C1
Figure 30: Speaker interface with amplifier design of AOUT2
Texas Instrument’s TPA6205A1is recommended for a suitable differential audio amplifier. There
are plenty of excellent audio amplifiers in the market.
Note: The value of C1 and C2 depends on the input impedance of audio amplifier.
3.10.4. Earphone interface design
1
2
4
3
Amphenol
9001-8905-050
SPK2P
MIC2N
MIC2P
22uF
68R
33pF
GND GND
AGND
Close to Socket
Differential layout
33pF
AGND
33pF 10pF
GND
GND
GND
GND
AGND
Module
4.7uF
Figure 31: Earphone interface design
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