I am currently building an output stage for a DAC with opamps, in single supply configuration.
Here is my circuit from LTspice:
I have exactly built this on PCB, so I am talking about the real thing not the simulation.
Now I am testing this in real life. When I send in a sinus, I can see a perfect sinus on Out_p and on Out_n on my scope, as long as I leave Out_p and Out_n open. But as soon as I connect an audio sink like an audio interface (that I wanted to connect for some measurements), Out_p gets heavily distorted.
So is there something wrong with this circuit?
Any hint is welcome!