STM32WLE5 subGhz Frequency offset vs supply voltage drop

[viola]

Hi ,

In table 32 in the Datasheet we can see TXDRP parameter which describes RF output power drop versus supply voltage. 

is there also RF frequency offset as a result of the supply voltage drop ? If the answer is yes - can you estimate it ?

Thank you,

Viola

[Uwe Bonnes]

What is yoyr RF frequency source? How large is the frequency chance vs supply voltage.

[viola]

Hi,

My RF Frequency source is 32MHZ TCXO which has +- 0.1 PPM Frequency offset for +-5 percent change of TCXO supply voltage.

But , my question is regarding the Synthesizer inside the STM32WLE5 - Does changing the one of the power supplies for the STM32WLE5 device has influence on the Synthesizer output frequency ?

Thanks,

Viola

[Uwe Bonnes]

I am quit sure, the synthesizer in effect is digital and there is no effective drift with voltage beside the drift of the input clock.

[viola]

It is mentioned in the datasheet that there is Auto-calibration of the RF-PLL after transition between certain RF power saving modes or when invoked manually . But i didnt see any additional info regarding that   .perhaps that also insures there is no drift in PLL output frequency ?