DAC AD1862: Almost THT, I2S input, NOS, R-2R

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#10,982
zoom777 said:
@Tea-Bag , this is correct.
Do you mind showing a picture of your JLSounds board?
Click to expand...
This is a photo of my USB to I2S converter. Not sure if it is the "JLSounds" you mentioned.

11.jpg
 
#10,985
Nope but we give an answer to a member who asked for this board (JLSOUNDS, which is a brand) he has and many people also have as it has given subjecctive good results. Amanero cheap copies has given subjectivly less good sounding results. Often SPIDF is best avoided for final sounding quality.

You migth have more answers if you read the thread in spite of poping up here out of context.

The little spidf/USB board you show looks like a Sygnalyst, btw. Pretty.

Just the way I see it at least, as people have high enough expectations being audio educated. 🙂 You will learn a lot at reading the thread.
 
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#10,986
Thank you
I roughly understand what you mean.
I see that "JLSounds" is a "USB bridge" based on the XMOS XU208 master chip.
The function is the same as my DIY CT7601PR converter.
When "MCLK" is not used to provide the clock signal for the DAC, there is no difference in the sound quality between the two.
At least I think so.

But if MCLK is needed, maybe XMOS will perform better because it is based on an external crystal to provide the I2S master clock signal.
 
#10,989
tommuel123 said:
Go to post #1042. Miro posted the resistances across pins.

M

Post in thread 'DAC AD1862: Almost THT, I2S input, NOS, R-2R'

here are resistances between pins on a working AD1862:

1-2 = 2R
11-12 = 3k3
13-12 = 6k6
1-3 = 38k
1-12 > 14M
16-12 > 14M
1-16 > 17M
4-9 > 25M or open
8-9 > 25M or open
4-8 > 25M or open
15-12 > 25M or open
5,6,7 - 9 = open
Click to expand...
'Lil ot, is something like these values available for a genuine pcm1704 chip that anyone of you know of?
 
#10,990
miro1360 said:
AD1865 ... the same principle

Not having AD1865 DAC in the collection? :sax:
Here is one ... the same PCB changed for AD1865 DAC.
It is tested by @Vunce.

Power supplies are slightly different!
analog part: +5VA, -5VA
digital part: +5VD

Have DIY fun 🙂
Click to expand...
I am starting to create a cart for the components, I assume all of the through hole resistors are 1/4W unless stated otherwise, is this a correct assumption?
Eliad
 
#10,992
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#10,993
Eliad said:
I am starting to create a cart for the components, I assume all of the through hole resistors are 1/4W unless stated otherwise, is this a correct assumption?
Eliad
Click to expand...
1/4W are normally in the smaller package size - labeled as 0204 🙂 ... package 0207 is normally 0.6W
https://erp.newmatik.com/files/KvozCz0.png
Wattage is not important in this case (except for 3W), package is mostly for visual impression 🙂
 
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#10,995
Hello folk,

I have made a GB for my 4 layers PCBs for the fanatics or beginners that need guidance (paint by number populating and BOM choice).

I posted it already here, but it needed to find a place not to polute here as it is not free while staying very cheap.

The pcb was made for my expectations but seems be loved by the few whom heard it.

diyiggy

Thread 'AD 1862 : 4 layers pcb core board'

Hello,

First 5 pcbs batch is over. But I post if there is an interest for a next batch as users testing it are more than happy.

I worked several years to meet my expectations with the AD1862 20 bits DAC chip. Made several protos as I already worked with the boards made by painkiller and miro1360 projects long time ago.

So Why another pcb ? I wanted to stay NOS but a pcb enhanced for :

  1. - a pcb allowing a layout for high speed SOIC 8 op amps and also a further follower voltage gain or buffer with a second soic 8 after the conversion if needed.
  2. - a pcb to be very quiet with...
 
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