STM32G070RB reference design; L1 inductor on AVDD

[julie_patel]

Hi,

 

We are using STM32G070RB for our application. Need a reference design for the schematic & also as mentioned in below screenshot there is requirement of L1 inductor on AVDD pin, Please let me know the Required value of inductance/impedance or please suggest suitable part no.

Also can we connect VBAT to VDD?

 

[waclawek.jan]

Review AN5096.

> L1 inductor on AVDD pin

There's no AVDD pin on this mcu, and VDDA is internally connected to VDD.

You may be talking about VREF+; if you want to supply that from VDD/VDDA, basically you want to create a low-pass filter to filter out all the digital noise; but there is no single good design/value/model/make for it. You may have a look at the related 'G0 DISCO/EVAL board how is this detail solved there.

JW

[Andrew Neil]

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@waclawek.jan wrote:

You may have a look at the related 'G0 DISCO/EVAL board how is this detail solved there.

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Although the Disco boards are not necessarily optimised for best analogue performance ...