More discrete R2R Mulibit dacs.

This is not discrete, but still R2R Multibit   OMG!!!!!!!

120kg for a dac!!!!!

http://www.stereo.net.au/forums/topic/121803-aries-cerat-kassandra-r2r-dac-120kgs/

Cheers George

Analog Devices AD5791

Made 2010 or even earlier, some talk was it was made for the US military for the guidance system of some type of surface to to air missiles, never intended for Audio use. I think the one in the AMR DP777 R2R multibit Dac was from a similar use.

Cheers George. 

At some point in the next month I'll try to get some organized comparisons of the DAC with others. I'm definitely enjoying it in my home system.

That'll be good to hear about.

Cheers George

Don’t forget Metrum acoustics they are making there own chips

I think maybe you mean discrete circuits, because chips are for the big boy manufacturers to make Analogue Devices, Burr Brown, AKM, ESS ect.

Cheers George

plutos
This is a bit off topic, I don’t know how this works in the US, but in Australia I have a 55" Panasonic plasma (I don’t find led or o’led natural), and a Panasonic PVR.
On one or the other can’t remember, in the setup menu both or one of them has two different digital (pcm or bitstream) for the digital out to choose from for the toslink, so I would say with this Multibit dac choose the pcm output, as that’s what they’re good at.

Cheers George

Wish I had the funds.

Cheers George

bigkidz

If you care to look/study and compare most dac chip manufacturer data sheets are adhered to for implementation, even some (hiend ones) using even the exact I/V stage and buffer stage that’s on those data sheets.
"Some" (me, Audio Note above ) use different I/V and buffers, but as far as dac implementation itself they nearly all follow the data sheet protocols.
But doing discrete with this topic that's another thing again.

Cheers George

Yes the AD5791 is still available but it was never designed as an audio dac, I don’t know what the down sides are for this in audio use. I believe the last audio one was the PCM1704 and it was more like >$120, a Delta Sigma is like <$10.

"AD5791 APPLICATIONS:
Medical instrumentation Test and measurement Industrial control High end scientific and aerospace instrumentation."

Cheers George

kalaliSo, all those discrete components combined replace one chip?

Yep, and they stopped making them years ago, because  Delta Sigma was more than 20 x cheaper to make and allowed for dsd use, probably because there was no laser trimming to be done like in an r2r ladder multibit dac, the last true ladder mulitbit being the Burr Brown PCM1704. It was only 24/96 this thing above can do  24/382

Cheers George

Here are some direct links to this amazing looking circuitry.

https://static.wixstatic.com/media/4b933e_1f4d615d52364f9eb3e891e34ed6487d~mv2.jpg/v1/fill/w_520,h_347,q_85,usm_0.66_1.00_0.01/4b933e_1f4d615d52364f9eb3e891e34ed6487d~mv2.jpg

https://static.wixstatic.com/media/4b933e_7b7dd4e1915747b091426786bb2b0c7d~mv2.jpg/v1/fill/w_520,h_387,q_85,usm_0.66_1.00_0.01/4b933e_7b7dd4e1915747b091426786bb2b0c7d~mv2.jpg

https://static.wixstatic.com/media/4b933e_737f10672a6a419a8564a75bfa5cb699~mv2.jpg/v1/fill/w_520,h_306,q_85,usm_0.66_1.00_0.01/4b933e_737f10672a6a419a8564a75bfa5cb699~mv2.jpg

Cheers George