VADC VRef settings

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cross mob
Not applicable
Hi all,

I am using my XMC1400 board with VDD set to 3.3 V. For certain measurements I need a range from 0-5 V in a certain VADC channel. Is it possible to set the input range from 0 to 5V without changing VDD to 5V?

Thank you
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3 Replies
User12775
Level 5
Level 5
First solution authored First like received
Whether you use 3.3V or 5V for the VDD, the Vref is always 5V. But you need to set the VDD range.
2528.attach
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Not applicable
Thank you
However, is it possible to use Vref = 5V as a reference to the VADC module with VDD set to 3 V?
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User12775
Level 5
Level 5
First solution authored First like received
You didn't understand my reply.

The Vref is always 5V if you use the internal reference, but you need to set the SHSCFG register according to your VDD suply.
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