Unsymmetrical shape distortion in DAC output

[djnik1362]

hi every one
I am using AD5433 DAC with AD8066 to generate a sine signal.
My produced signal does not have a symmetrical shape.
It is clean in rising edge but distorted in falling edge.

When smaller load connect to output, the shape will be distorted even more.

My sine LUT is correct.

Can you help me what is wrong.

Thanks.

 

[FvM]

Should be discussed referring to a schematic diagram.

 

[crutschow]

What is the sinewave frequency?

 

[neddie]

These DAC's require a resistive load on the output to function. Maybe your load is to small (resistor to big).
Try decreasing your load resistance.

 

[FvM]

These DAC's require a resistive load on the output to function.

AD5433 is R-2R ladder DAC and is not operated with a resistive load. It's usually operated with an OP a I/V converter, apparently djnik1362 does it with AD8066.