Analog output stage for DAC (AK4584) - diyAudio
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Old 21st March 2009, 04:07 PM   #1
Ekkeri is offline Ekkeri  Finland
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Join Date: Dec 2008
Post Analog output stage for DAC (AK4584)

Hi!

I have this DAC, AK4584:

http://www.asahi-kasei.co.jp/akm/en/...84/ak4584.html

I'm asking your opinion what to put to its LOUT & ROUT pins. There isn't nothing yet.

I'm thinking to use that with Corda HA-1 II Headphone amp and modified Sure Electronics Tripath TA2024 amp (sureelectronics Tripath boards?)

Any ideas? Some kind of opamp circuit? What opamp to use? Dual AD843 or something else? I will appreciate all help.. Thanks!

-Mikko
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Old 22nd March 2009, 05:11 AM   #2
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That is A/D and D/A interface chip...

If you need differential to single end analog stage, one was discussed in detail in this thread:

Experience with this DIY DAC ?

Boky
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Old 22nd March 2009, 11:44 AM   #3
Ekkeri is offline Ekkeri  Finland
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Join Date: Dec 2008
Yeah, I'm thinking to use its ADC as a measure device with Eric Wallin's preamp 2 microphone preamp (green inputs). I don't know why there are capacitors in the picture because text says there are internal HiPassFilter that removes DC offset? So I don't have to put any caps to signal path?

Here is some schematics of that AK4584:

Click the image to open in full size. Click the image to open in full size.

DZF in Zero Input Detect Pin (output) so I think it can be used to turn amp off when there isn't anything in the ROUT & LOUT. It says in the page 8 of the datasheet that DAC analog output is 3 Vpp (@5V VREF). So if I use opamp, I don't need too much gain?

I did some more searching (a little too much, I think) and there was op amps (which sounded promising) like LM4562, OPA627, AD843.. And then I found discrete opamps / discrete output stages. And then.. I'm now considering Lampizator.

So hard to decide what to do..
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Old 22nd March 2009, 06:37 PM   #4
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"Analog Outputs are single ended" .... you can feed them straight to the pre-amp with reasonably high input impedance. No need for any further gain neither.

The inputs can do without the capacitors.

Boky
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