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Robert_PIN_ASAP's avatar
Robert_PIN_ASAP
Icon for Occasional Contributor rankOccasional Contributor
2 months ago

Agilex 3 VCCLSENSE and GNDSENSE

Hello, For Agilex 3, what is the recommendation for VCCLSENSE and GNDSENSE  if our regulator for VCC does not provide remote sense inputs?    Can we just leave these two device outputs as no connect...
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Ash_R_Altera's avatar
Ash_R_Altera
Icon for Regular Contributor rankRegular Contributor
2 months ago

Hi,

First thing is that whether the regulator that you choose is from a recommended list or not. Refer to 

https://docs.altera.com/r/docs/853726/current/pcb-design-guidelines/pcb-voltage-regulator-recommendation-for-pcb-power-rails

 

Secondly, the VCCLSENSE and GNDSENSE are recommended to be a must connected pins for VCC core. These pins compensates for the DC IR drop associated with the PCB and device package from the VCC power.

 

Altera strongly recommends to follow the guidelines provided for a smooth operation of the device. Any design outside the recommendations will not be supported. It will be at user risk.

 

Regards,

Altera support

Ash_R_Altera's avatar
Ash_R_Altera
Icon for Regular Contributor rankRegular Contributor
2 months ago

Hi,

Yes, the Agilex 3 does NOT require a SmartVID compatible regulator. You can provide a fixed voltage to VCC as mentioned in the datasheet.

However on the VCCLSENSE and GNDSENSE pins, these pins compensates for the DC IR drop associated with the PCB and device package from the VCC power. It is recommended to connect them to the regulator.

 

Regards