Specifications

Product Technical Specification & Customer Design Guidelines
Interfaces
© Confidential
Page: 66 / 116
This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.
WA_DEV_Q64_PTS_001-003 January 9, 2009
3.11.5.5 Audio Track and PCB Layout Recommendation
To avoid TDMA noise, it is recommended to surround the audio tracks by ground:
Figure 23: Audio track design
Remark:
Avoid digital tracks crossing under and over the audio tracks.
0.2mm min
Differential Audio line
Ground Ground
1mm
0.15mm max
1mm
Differential
Audio line
always in
parallel
Application
board
Ground
Plane
Q64