What is the output impedance of STM32WBA52 RF？

[hatone]

Hello, I am working on a new design using the STM32WBA52CGU6, but I have not found a specific value for the RF output impedance of stm32wba,How do I match it to 50 ohms？

[hatone]

My current design for the stm32wba system does not enable Bluetooth, and the current is normal. After enabling Bluetooth, the current is more than 10 times normal. Is this situation caused by my impedance mismatch? Assuming my impedance mismatch, will it damage the AP of stm32wba

[STTwo-32]

Hello @hatone 

I suggest you follow the RF topology of the Nucleo-WBA52CG which already have the optimized impedance RF pin of 50 ohms and doesn't need an extra matching network that matches to 50 ohms.

 Best Regards.

STTwo-32