DIY ADC

[dan2804]

Hello,

I am looking at making multichannel ADC.
I don't want anything fancy. Just something that takes multichannel inputs (24, 32, 64 channels) and converts them to MADI.
I don't need any routing control, any effects/dsp processing. Literally a one analog input to one digital output

I have quite a bit of electronic knowledge so I have some idea on how to do this, but I'm not a specialist and wanted some ideas on the best options to do this

 

[jcx]

buy, RME's M-32 AD for less than US$5k - even if you have to work for $15/hr "minimum wage" for the cash

 

[dan2804]

That wasn't what I exactly asked. It still comes with all the midi control and stuff which I don't really want. Plus getting into higher channel counts (i.e buying more than one converter for more than 32 channels) gets far too expensive

 

[jcx]

design, build, debugging, respinng, verifying aren't cheap

no one, even a decades experienced mixed signal design pro, can beat the price of anything electronic built and sold in competitive markets in many k quantities by multiple companies when designing, building hobby quanties with equivalent functionality, performance

I designed scientific and industrial instrumentation to 16 bit/100 kHz and 20 bits/20 Hz sample rates and I now own better equipment in retirement than I had at work

I can't beat their price

the rule of thumb at work was 5-20x the expected sales price to working preproduction prototypes for just the physical build - not including design and test EE and technician time, probable dedicated test equipment rental

my nested loop, bootstrapped supply, paralleled TPA6120 headphone amp blank sheet design cost me over $5k out of pocket for Pro Eagle license, parts, 10 pcs of 4 layer board – and is comparatively trivial compared to what you are talking about

 

[TNT]

Maybe if you spill your ideas you will get the thinking going.

//

 

[Terry Demol]

Hello,

I am looking at making multichannel ADC.
I don't want anything fancy. Just something that takes multichannel inputs (24, 32, 64 channels) and converts them to MADI.
I don't need any routing control, any effects/dsp processing. Literally a one analog input to one digital output

I have quite a bit of electronic knowledge so I have some idea on how to do this, but I'm not a specialist and wanted some ideas on the best options to do this

What are your target specs?

T

 

[dan2804]

Well all I want is something like the RME AD-32 but without all serial and midi over madi stuff. I literally want to take 32 or 64 (preferably 64) line level inputs and get them into a madi stream to connect to my maid card