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ssb01 as dac output stage?

Started by pidesd, March 20, 2010, 03:50:22 PM

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pidesd

heaveno,

wondering how i could use the buffers as an output stage for V out dac. can i just put an input cap and that s it?

peranders

You may check how your DAC out is right now. Does it need a buffer?
/Per-Anders Sjöström, owner of this forum

Homepage with my DIY hifi stuff

pidesd

not sure what you mean ...but i want to replace the output stage  in my dac. i would tap the signal from the dac chip output directly.

peranders

Is the output from the DAC a voltage or a current output? You must know this. Have you checked the schematics?
/Per-Anders Sjöström, owner of this forum

Homepage with my DIY hifi stuff

pidesd

it s for a voltage out dac as stated in my first post :-)

either ad1852 or sabre dac. is it easy and desirable to put your buffer as an output stage?

peranders

The DAC needs an output filter, do you have that?
/Per-Anders Sjöström, owner of this forum

Homepage with my DIY hifi stuff

pidesd

#6
errrr...no but i have a couple of inductors 10k mh at hand...

didnt think i needed anything else...

if i ever end up not seeing a use for the buffers you just sent me i ll give them to someone i guess

would it be easy to make a filter?

peranders

You could have them in an active filter.

Curious, but how do you handle the out of band noise from the DAC if you don't have a serious filter? The datasheet suggests a third order Bessel filter.
/Per-Anders Sjöström, owner of this forum

Homepage with my DIY hifi stuff

pidesd

well the thruth is that i didnt adress this problem yet. i thought i didnt need a filter.

any clue about where to start on this?

dont want you to make all the work for me. maybe i m getting into something too complicated for my not so expert skills.

peranders

You should consult the datasheet for the DAC and also available application notes. Those documents are for commercial designs. It's a very good start.
/Per-Anders Sjöström, owner of this forum

Homepage with my DIY hifi stuff