iPAD to DAC?

I would like to try using my later day iPad as a digital streaming source for a PS Audio Direct Stream DAC. I understand there is an Apple supplied cable that comes with the camera kit, but later day posts indicate it does not work with the latest iOS's. There was also a Cambridge docking station with Coax and Optical out, but that is no longer available.

Has anyone had success with this, lately?

Thanks,

Dudley