GND AGND pin confusion on the AT32UC3B0256

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Hi,

We are in a design phase of a project based on the AT32UC3B0256. We use 3 analog inputs.

Now, we refered the EVK1101 schematics and it says the pin 17 is AGND. But, the datasheet says that it is GND.
So, which one is correct?

If pin 17 is GND, then there is no AGND on the chip!

Thanks,
-Deven

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Obviously there is no special AGND pin at the AT32UC3B0256 although a GNDANA is described in the data sheet. Usually AGND and GND is the same on the chip. If you want to get analog signals somehow better you should design your layout with a separated AGND which is connected to GND at one point only. This is typically done close to the ADC reference point which could be PIN 17.

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uC-Harry wrote:
Obviously there is no special AGND pin at the AT32UC3B0256 although a GNDANA is described in the data sheet. Usually AGND and GND is the same on the chip. If you want to get analog signals somehow better you should design your layout with a separated AGND which is connected to GND at one point only. This is typically done close to the ADC reference point which could be PIN 17.

Thanks! I will take your suggestions.

-Deven