AWR6843:What is the cause of 13RF1/2 power line ripple ?

Hello,

you can refer to my response in this thread.

https://e2e.ti.com/support/sensors-group/sensors---internal/f/sensors---internal-forum/1163268/awr6843isk-noise-on-the-board-with-awr6843isk-and-lp87524j

It is caused by the RF blocks turning on/off during the chirping cycle. Since the RF supply will be transitioning from very low load to very high load when the TX turns on and very high load to very low load when TX turns off, you will see a ripple on the 1.0V supplies. The ripple will be worse due to the inductance of the LC filter resisting the change in current. As long as the ripple has settled before you start ADC sampling it should not cause any issues.

Regards,

Adrian

Thank you for your answer.

but page not found...  please check.

And one more question.

Can it be a problem because of the RF power line ripple like above?