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

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#10,042
grunf said:
Good choice for decoupling around PCM1702 and good idea for soldering them. For decoupling for + and - you can freely use OS-CON and for the other three electrolytes it is important that they have low leakage current.
Good luck with further work and for I/V you must use AD811, don't mess around with other op amps, there is no point.
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BTW, I have the Tube I/V designed by you (layout by Michelag).
Since I will use a 6n1p tube and a 0-200vac transformer, I'm waiting for some 400V caps to arrive 🙂
Btw, the 100nF caps by the 1K resistors on the PSU board...I can put 1uF caps there? It's what I have that's >400V.
 
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#10,045
Ehm, Sorry for the newbie question, I'm trying CPLD on ad1865, where do I connect 21 - CL (clock for DAC) and
19 - LE (Latch) from cpld module? I followed the instructions, but now I'm stranded here... Clock should be lrck, but latch?
Thanks


Edit, bck and le pins of DAC ic
 
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#10,047
Maybe a stupid question, but how do you determine the value of the "output resistors" marked 0-100R?
 

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#10,050
Mayday said:
Maybe a stupid question, but how do you determine the value of the "output resistors" marked 0-100R?
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No stupid questions only stupid answers 😁
If you're going to use one pair of ic cables to the rest of that dac life, then you can calculate resistor value there as you will know the cable resistance and (main culprit) capacitance. If not, 22-47R will cover most if not all ic cables you will put there, and what it does is in short is, prevent oscillations. It also saves your opamp (potentially dac chip as well) in case of a short. Best thing is, use quality resistor there and you won't have impact on the sound, so, win win.
 
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#10,054
Amanero clone with SITIME oscilators is a very good choice for AD1862, for the budget version, and minimal dimensions. There is nothing better for the money (30$). JLS is better, WaveIO is better, but only if separate quality power supplies are made for them. And that is 5x bigger and 5x more expensive. A separate 3.3V power supply for Amanero can be made (with a small tweak on the PCB), so it will be even better.
 
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#10,056
NIXIE62 said:
Amanero clone with SITIME oscilators is a very good choice for AD1862, for the budget version, and minimal dimensions. There is nothing better for the money (30$). JLS is better, WaveIO is better, but only if separate quality power supplies are made for them. And that is 5x bigger and 5x more expensive. A separate 3.3V power supply for Amanero can be made (with a small tweak on the PCB), so it will be even better.
Click to expand...
I've got one of the Amanero's with Sitime oscilators. Do you think it's better than the TekDevices WM8804 boards (if I can find the info for setting the jumpers)?
I'm nearly done with the PCM1702 DAC. Next up will be the PCM63 with I2SoverUSB footprint DAC but with CPLD instead of the I2SoverUSB board. One will get the Amanero, the other some other digital interface.
 
#10,057
I wouldn't know, the WM8804 is a SPDIF receiver that outputs I2S or vice versa, and these are USB/I2S cards. I already said that I use mostly AK4113 and 4118 for SPDIF/TOSLINK to I2S. I have a WM8804 in DDDAC (and WaveIO USB/I2S). The WM8804 is generally considered to be the best SPDIF receiver chip.
 
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