User Manual

8
Layout Design Suggestions
• General Layout Rules- All Printed Circuit Boards must comply with UL94V0
standard for flammability. Always use RoHS compliant Parts and materials.
• Suggestions for Layout:
1. Do not place Power circuit, X’tal, Inductor, etc near RF area.
2. The bigger Antenna clearance area, the better. The Antenna itself needs to stay away
from any circuit or component at least 2mm. Antenna clearance area means Top and
Bottom both required to be cleared.
3. Do not use metal materials on design where near Antenna area. For example, battery
snaps, USB connector, iron case, etc.
4. Except ground, do not place any circuit below Bluetooth IC. The area below Bluetooth
IC is required to be ground and be connected by through hole.
5. When meeting a turning point, try to make the circuit as smooth as you can.
6. Put all TP (Test-Point) in one area, in order to make easier for a fixture design.
7. Within the acceptance, please make circuit diameter as big as you can.
8. If a position hole is needed, please make them in diagonal location. This design could
make easier for fixture allocation and save cost in fixture designing.
These guidelines are for design reference; real performance still depends on actual
design.