Hello friends,
I am using nrf52840-CKAA for my customize PCB.
I am facing the noise during RF transmission on my ADC. The peak noise happen when I send a packet of data via RF antenna.
Power_Tx = 4dBm
When I decrease the Tx Power to -12dBm, the peak noise was gone.
I wonder that MCU takes a lot of power during RF transmission so it affect to the stability of power line.
In nrf52840-CKAA, currently I tie all VSS pin together instead of tie each of them directly to the GND plane. Is it the problem?
I appreciate all your suggestions.
Minhduc