MAX 10 ADC Vref = 2.5V with VCC_ONE = 3.3V

[ABart20]

Table 34 (ADC Performance Specifications for Intel® MAX® 10 Single Supply Devices) in the MAX 10 FPGA Device Datasheet specifies a Vref-minimum of VCC_ONE - 0.5V.

https://www.intel.com/content/www/us/en/programmable/documentation/mcn1397700832153.html#mcn1397985049075

One of our existing designs violates this specification with  Vref = 2.5V and VCC_ONE = 3.3V.

What are the risks in this usage? Can this cause failure of the entire part?  Can this cause failure of the ADC?

Thanks.

[JonWay_C_Intel]

Hi @ABart20​ 

The absolute max for VCC_ONE is 3.9V. Exceeding will cause damage.

We have only verified the ADC performance up to the max in Table 34. above that, performance is not guaranteed.