Slaphead
500+ Head-Fier
Interestingly there are at least 3 variants of the iPod touch 5th gen.
The original 16GB without camera - can't find seperate tear down for this one
The 2014 refresh of the 16GB model which included the camera, and appears to have 2 Apple custom Cirrus DACs - one on the Logicboard (338S1146) and one nestling inbetween the lightning connector and the HP jack (338S1077 - the one that you refer to)
And finally the 32 & 64 GB variants where the teardown appears to show a 338S1116 DAC on the logicboard - identical to that of the new 6th gen touch.
However a number of Apple custom chips start with the number 338S, and while I tend to trust iFixits teardowns, there is a chance that what we're looking at are not DACs at all.
Also throughout production runs components can be and are changed, so what is in the teardown may not neccessarily be what's in the device you're holding, even if it is an identical model.