The 3.5mm adapters that Apple makes absolutely include a DAC themselves. Not sure where you get the idea that they don't.
Both the USB-C and the Lightning versions are all digital on the port side.
There are very few USB-C analog -> 3.5mm adapters, strictly because there is so many compatible issues (i.e., you need to support the alternate mode, AND you need to map the pins correctly).
Both the USB-C and the Lightning versions are all digital on the port side.
There are very few USB-C analog -> 3.5mm adapters, strictly because there is so many compatible issues (i.e., you need to support the alternate mode, AND you need to map the pins correctly).