Specifications

Product Technical Specification & Customer Design Guidelines
Interfaces
3.11.4.2.3 AUXO Connection
Typical implementation
:
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WA_DEV_Q64_PTS_001-003 January 9, 2009
Figure 21: Example of AUXO connection
An capacitor C1 (4.7 μF < C1 < 47 μF) can be added (optional)(depending on speaker
characteristics and output power).
A decoupling capacitor C3 is highly recommended to reduce the TDMA noise. C3
must be close to the speaker.
The connection between the Q64 pin and the speaker must be designed to keep the
serial impedance lower than 1.5
Ω in single-ended mode.
While using a single-ended connection in AUXO, ensure to have a good ground plane,
a good filtering and shielding, in order to avoid any disturbance on the audio path. It
is recommended to use the Q64 Wireless CPU
®
AREF pin for the good plane
connection.