can i trust Fmax ?

[qd0090]

i use 10m02DCV36C8G,  my clock is 96MHz(generate by pll)

i constraint the clk in timequest, and the time quest shows 

in slow 1200mV 85C model   the Fmax is 119.6MHz

can i trust it ?

and 

i guess the 85C is temperature,   what is 1200mV means?

[Ash_R_Intel · Accepted solution]

Hi,

Yes, you can trust the frequency reported by the tool for given operating condition. You may also check for the achieved frequency for other models.

Please refer below links:

https://www.intel.com/content/www/us/en/programmable/documentation/ony1529966370740.html#mwh1410383633780

or

https://www.intel.com/content/www/us/en/programmable/documentation/psq1513989797346.html#mwh1445287109731

Each describes the meaning of slow and fast and the differences between them.

The 1200mV in the setting mean that the core supply voltage is set to 1200mV.

As you figured out correctly, 85C is the max temperature for your commercial grade device.

Regards.

[qd0090]

1. does it means

in condition of slow 1200mV 85C 

the design can reach Fmax?  (which is 119.6 MHz)

in this case, there is still margin for my design(119.6MHz>96MHz), can the  10m02DCV36C8G work in higher temperature? like 90C?

2. if the what will happen if the Tj>85C?

3. since the Tj is  not the environment temperature

how can i know the Tj?

i mean the Tj may > 85C when environment temperature is 60C

[kelvinly_steris]

You can set the operating conditions in the Timing Analyzer to test how it works at your higher temperature, at least on my setup there's a default set at 100 C that might be useful

You can use the thermal resistance of the package ( https://www.intel.com/content/www/us/en/programmable/support/literature/lit-index/lit-pkg/thermal.html?type=thermal&family=MAX_10 ) plus the power consumption estimate, or measure current consumption in operation, to calculate the junction temperature