Re: DDS spectral "purity" ?

Alfredo Mendiola Loyola
 

Hello,

I advice to use the CFB Opamp THS3201.
You can use a 75 Ohm or 200 Ohm Resistor on the input instead the 50 Ohm to get more output voltage.
See the datasheet for the second and third harmonics.

I'm using these opamps with my AD9851 DDS.

Regards.
Alfredo Mendiola Loyola
OA4AJP
Lima, Peru

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