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DAC AD1862: Almost THT, I2S input, NOS, R-2R
DAC AD1862: Almost THT, I2S input, NOS, R-2R
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Old 10th June 2020, 05:38 PM   #21
diyiggy is offline diyiggy
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Join Date: Jan 2019
Thank you for sharing and the adress tip.



It would make a pair of months as I'm busy on a speaker project but I will send you by pm my personal review and what I've found about passive parts I'd liked best! I will have also to adapt tiny uf-l pads as my I2S source is from IanCanada, if the traces d the I2S through holes are big enough this would be not too much compicated...


My headphone is a Fostex, 70 ohms impedance iirc !
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Old 10th June 2020, 05:47 PM   #22
miro1360 is offline miro1360  Europe
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The traces should be big enough for any I2S source.
easydac can drive 70 ohm impedance as well as 600 ohm because on the pcb is integrated TPA6120 headphone amplifier ... it can drive small speakers
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Old 10th June 2020, 05:50 PM   #23
diyiggy is offline diyiggy
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you will laugh : an oap I use to like a lot for headphones was the JRC 4580DD if I remember, very neutral when care with the decoupling...quite old now vs newest designs...
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Old 10th June 2020, 06:20 PM   #24
miro1360 is offline miro1360  Europe
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4580 was widely used, good sounding one
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Old 10th June 2020, 06:23 PM   #25
diyiggy is offline diyiggy
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The DD version especially....When listening to my hifi musician friends say I'm not tottaly deaf yet! Maybe because the wine they drink here ! Lol !
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Old 10th June 2020, 08:09 PM   #26
eziitis is offline eziitis
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Quote:
Originally Posted by miro1360 View Post
here is 4-layer PCB: easyDAC = NOS R-2R AD1862 DAC + Headphone Amp
you can omit some parts that you don't need
if there is more interest, I can create SMD version as well in the same way as this THT
But as diyiggi wrote, THT is trouble-free, the sound still be great
thanks, I will take a closer look.
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Old 12th June 2020, 06:35 PM   #27
chi0001 is offline chi0001  Hong Kong
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great, just downloaded the garber file.
i tried ad1862 with headphone amp, must try.
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Old 12th June 2020, 06:47 PM   #28
miro1360 is offline miro1360  Europe
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Perfect Shing, then let us know, I hope for no errors on the PCB
C37 and C38 let unpopulated
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Old 12th June 2020, 06:54 PM   #29
chi0001 is offline chi0001  Hong Kong
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without rc filter means omit r10, r11, c37, c38 then solder the wire be jumper on r10 and r11?
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Old 12th June 2020, 07:03 PM   #30
chi0001 is offline chi0001  Hong Kong
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btw, the "ad1862 with headphone amp", the output stage i tried 3 different audio output transformers, one is from china, one is sowter 3575 and tamura tks-84, all of them excellent.
i think if that pcb output stage have 2 external pins for other passive output stage, thats perfect. ^^
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