Data Sheet
Table Of Contents
- 1. Feature List
- 2. Ordering Information
- 3. System Overview
- 4. Electrical Characteristics
- 4.1 Absolute Maximum Ratings
- 4.2 General Operating Conditions
- 4.3 MCU Current Consumption with 3 V Supply
- 4.4 Radio Current Consumption with 3 V Supply
- 4.5 RF Transmitter General Characteristics for the 2.4 GHz Band
- 4.6 RF Receiver General Characteristics for the 2.4 GHz Band
- 4.7 RF Receiver Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 1 Mbps Data Rate
- 4.8 RF Receiver Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 2 Mbps Data Rate
- 4.9 RF Receiver Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 500 kbps Data Rate
- 4.10 RF Receiver Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 125 kbps Data Rate
- 4.11 High-Frequency Crystal
- 4.12 Low Frequency Crystal Oscillator
- 4.13 Precision Low Frequency RC Oscillator (LFRCO)
- 4.14 GPIO Pins
- 4.15 Microcontroller Peripherals
- 4.16 Typical Performance Curves
- 5. Reference Diagrams
- 6. Pin Definitions
- 7. Design Guidelines
- 8. Package Specifications
- 9. Soldering Recommendations
- 10. Tape and Reel
- 11. Certifications
- 12. Revision History
7.3 Radio Performance vs. Carrier Board Size
For many applications, the carrier board size is determined by the overall form factor or size of the additional circuitry. The recommen-
ded carrier board width of 50 mm for the BGM220S12A and 55 mm for the BGM220S22A is thus not always possible in the end-appli-
cation. If another form factor is required, the antenna performance of the integrated antenna will be compromised but it may still be
sufficiently good for providing the required link quality and range of the end-application. Figure 7.6 Efficiency of the Integrated Antenna
as Function of the Carrier Board Size for BGM220S12A on page 37 and Figure 7.7 Efficiency of the Integrated Antenna as Function
of the Carrier Board Size for BGM220S22A on page 38 show the total efficiency of the integrated antenna for different carrier board
sizes. As can be seen the best performance is achieved for the carrier board size of 50 mm x 30 mm for the BGM220S12A and 55 mm
x 25 mm for the BGM220S22A, with relatively constant performance for larger boards and rapidly declining performance for smaller
boards.
The performance of all the sizes tested will be adequate for more than 15 m line-of-sight range and all of the sizes are thus usable.
WARNING: Any antenna tuning or change of the loop dimensions will void the modular certification of modules with modular
certification. In that case, a Permissive Change to the modular approval is required.
Figure 7.6. Efficiency of the Integrated Antenna as Function of the Carrier Board Size for BGM220S12A
BGM220S Wireless Gecko Bluetooth Module Data Sheet
Design Guidelines
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