In my circuit i have an ADL5565 powerd by +/- 2.5Volt( see picture below) DC coupled .
When i apply a differential ramp voltage to the input( Pin 2: -0.5V...0.5V and Pin 3: 0.5V...-0.5V) i see a huge nonlinearety of +/- 75ppm.
I becomes smaller with a smaller input voltage:
Input Output Error
2Vpp_diff 4Vpp_diff +/-75PPM
1Vpp_diff 2Vpp_diff +/-30PPM
0.5Vpp_diff 1Vpp_diff +/-11PPM
The shape of the non-linearety look like the picture below
An DC offset on the input does not influence the linearety.
Is this a know issue with the ADL5565 and is this frequency dependent?
In de datasheet there is not a lot of information about DC-couppled circuits.
I hope someone can tel me more about this issue
Thanks in advance foor any reaction