Data Sheet
Table Of Contents
- 1. Feature List
- 2. Typical Applications
- 3. Design Guidelines
- 4. Pin-Out Description
- 5. Power Control
- 6. Interface
- 7. Antenna
- 8. Bluetooth® Software Stack
- 9. Host Interface
- 10. Connection Examples
- 11. Electrical Characteristics
- 12. RF Characteristics
- 13. Packaging Specifications
- 14. Soldering Recommendations
- 15. Tape and Reel Packaging
- 16. Certifications
- 17. Ordering Guide
- 18. Revision History
3. Design Guidelines
Certain hardware related design guidelines should always be followed when developing applications based on the BT122 module.
3.1 PCB Layout Recommendations
• All ground pads should be connected to a ground plane.
• The antenna layout should follow the example shown in the figure below and avoid the designs shown as crossed over.
• BT122 requires minimal free space around the module and only the white area marked in the PCB picture series presented in Figure
3.1 PCB Layout Recommendations for the BT122 Boards on page 6 below needs to be free of copper and components.
Figure 3.1. PCB Layout Recommendations for the BT122 Boards
3.2 Power Supply Recommendations
The regulator used must be capable of supplying a peak current of 150 mA and the regulator must be of a type stable with ceramic
capacitors.
3.3 Software Application-Related Options
BT122 can be used either as a stand-alone solution by using the BGScript
™
scripting language or alternatively, if the application soft-
ware size or other factors require - together with an external host processor by using BGAPI
™
commands. The decision on which ap-
proach to use is most often dictated by use-case scenario .
BT122 Data Sheet
Design Guidelines
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