DAC38RF82EVM: Using external sysref to reset NCO

dheeraj lakkam

I am using external DAC clock. NCO phase and frquency reset using Sysref takes less time compared to SIF sync. I have a requirement of using external trigger(not a integer divider of DAC clock) for Reset . How to implement on evaluation module.

over 7 years ago

0 Ebenezer Dwobeng over 7 years ago

TI__Genius 9695 points

Hi Dheeraj,

You can modify the EVM by removing R103 and R104 and apply a differential external SYSREF pulse there.

The common mode of the pulse generator must be set to 500mV.

Thanks,

Eben.

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DAC38RF82EVM: Using external sysref to reset NCO