Q2686

Manufacturer Part NumberQ2686
DescriptionWireless CPU
ManufacturerWavecom
Q2686 datasheet
 


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Page 78/89

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6 Design Guidelines
The purpose of the following paragraphs is to give design guidelines.
6.1 HARDWARE and RF
www.DataSheet4U.com
6.1.1 EMC Recommendations
The EMC tests must be performed on the application as soon as possible to
detect any potential problems.
When designing, special attention should be paid to:
Possible spurious emission radiated by the application to the RF receiver
in the receiver band
ESD protection
accessibility (typically human accessibility). See Q2686 Wireless CPU
Customer Design Guidelines WM_PRJ_Q2686_PTS_003 [10] for ESD
protection samples.
Typically, ESD protection is mandatory for the:
o
EMC
protection
emissions)
Biasing of the microphone inputs
Length of the SIM interface lines (preferably <10cm)
Ground plane: Wavecom recommends a common ground plane for
analog/digital/RF grounds.
A metallic case or plastic casing with conductive paint are recommended
Note:
The Wireless CPU
This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.
WM_PRJ_Q2686_PTS_001-007
is mandatory
on all signals which have external
SIM (if accessible from outside)
Serial link
on
audio
input/output
®
does not include any protection against over-voltage.
confidential ©
®
Q2686 Wireless CPU
Design Guidelines
®
(filters
against
900MHz
Page: 77 / 87
March 6, 2007