AD9915
Recommended for New Designs
The AD9915 is a direct digital synthesizer (DDS) featuring a 12-bit DAC. The AD9915 uses advanced DDS technology, coupled with an internal high speed,...
Datasheet
AD9915 on Analog.com
Dear ADI engineer:
Hello!
Currently, I am using the AD9915 chip to output sweep signals with a frequency range of 1GHz to 3GHz in ramp mode, and have successfully obtained the expected waveform. However, in practical applications, I hope to further increase the output amplitude of the sweep signal.
In response to this requirement, I attempted the following operational approach: firstly, I utilized the OSK (Output Amplitude Control Key) function and carefully set the desired amplitude value in the profile register; Subsequently, the AD9915 was configured in ramp mode and successfully generated the required sweep signal. However, unfortunately, the above operation did not achieve the expected effect of increasing the output amplitude.
In view of this, I would like to ask if you have any other effective suggestions or methods that can help me achieve effective control of the amplitude of the sweep signal output by AD9915 in ramp mode and increase its output amplitude?
Hi Shun21 ,
I just noticed you used AD9915 which I believe has a maximum frequency input of only up to 2.5 GHz. You used up to 3 GHz so I'm not sure this might be the reason you are not getting the expected amplitude.
The full-scale amplitude can be achieved through this equation below just for your guide.
All the best,
Jules
