I'm looking for options on my AK4396 DAC.
As the chip output is differential, this would have to be at least a differential buffer with no gain.
Any suggestions for such a thing?
As the chip output is differential, this would have to be at least a differential buffer with no gain.
Any suggestions for such a thing?
Hi
This chip does not need an i/v stage because it is a voltage out put DAC. An i/v stage is required for current output DACs only.
You may buy discrete dual opamp from various sources. Just google for discrete dual opamp. It's not easy to make high performance discrete opamp. It takes times and cost for R&D.
This chip does not need an i/v stage because it is a voltage out put DAC. An i/v stage is required for current output DACs only.
You may buy discrete dual opamp from various sources. Just google for discrete dual opamp. It's not easy to make high performance discrete opamp. It takes times and cost for R&D.
Buffer the outputs (use an emitter follower biassed by a current source) then the balanced buffers feed into a transformer.
Hi,
You can use any simple Buffer for each of the inverting and the noninvertung outputs.
It doesn´t need to be differential and it doesn´t require a transformer to achieve balance.
Transformer only adds galvanicv isolation (good) and distortion (bad) and reduces Bandwidth (not as good).
jauu
Calvin
You can use any simple Buffer for each of the inverting and the noninvertung outputs.
It doesn´t need to be differential and it doesn´t require a transformer to achieve balance.
Transformer only adds galvanicv isolation (good) and distortion (bad) and reduces Bandwidth (not as good).
jauu
Calvin
These don't sound half bad... get 2? The filter section can be omitted.
JG buffer - I2S over USB Audio
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JG buffer - I2S over USB Audio
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What do you do with the inverting signal after the buffer? Ground it?
I mean as a way to go from differential to single.
The suggestion has potential, though.
Is there a way to eliminate the inductors in line with the signal?
Hi,
when connecting unbalanced to the next device You can simply leave the unused output open.
Just use noninverting output and signal gnd.
Using both outputs and combine them with a diffential amplifier to a singleended signal may give a bit lower THD values but all decent DAC chips offer so low THD and noise figures anyways that any improvement would be purely academic .
The sonic benefit of less active stages involved is imho certainly much more worth than a slightly better 4th-digit figure.
jauu
Calvin
when connecting unbalanced to the next device You can simply leave the unused output open.
Just use noninverting output and signal gnd.
Using both outputs and combine them with a diffential amplifier to a singleended signal may give a bit lower THD values but all decent DAC chips offer so low THD and noise figures anyways that any improvement would be purely academic .
The sonic benefit of less active stages involved is imho certainly much more worth than a slightly better 4th-digit figure.
jauu
Calvin
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