DAC 1860N-T

Hello anybody experimenting DAC's from the old school.

I have several machines running on PCM DAC's from AD  .

Some use AD1860N-T,  so not the usual -J, or -K.

For instance Sony CDP-2700.

Does anyone have technical information about the AD1860N-T  ?

What is the difference between those DAC's and which are interchangable ?

Thans you all for your cooperation.

Audio Consultants from Holland,  Hans Splinter.