The Hagerman DAC USB DAC, the Chime is pretty expensive, so I think Kbuzz is refering to the HagUSB, which is similar to the "Thingy" mentioned by Jwmazur and converts a USB signal into a digital signal that can be input to a DAC. In the case of the HagUSB, RCA Coax and AES/EBU outputs are available. Both devices still require a DAC.
I have a few systems and one uses a HagUSB into a Slimdevices Transporter's RCA Coax digital input.