User's Manual

UMTS/HSDPA Module Series
UC15 Hardware Design
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3.11.3. Receiver and Speaker Interface Application
Figure 22: Reference Design for AOUT1
SPK1P
SPK1N
Differential layout
Amplifier circuit
Module
10pF
0603
Close to speaker
GND
33pF
0603
33pF
0603
GND
10pF
0603
10pF
0603
33pF
0603
Figure 23: Reference Design with an Amplifier for AOUT1
Texas Instruments TPA6205A1 is recommended for a suitable differential audio amplifier. There are
plenty of excellent audio amplifiers in the market.