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

[NIXIE62]

Pin 8 on I2S connector.

I made my own power supplies, I didn't use PSUD2 boards, I have separate secondary's on the transformer for each power supply. GNDs from the digital power supplies for JLS, AK4113 and PCM63 boards are not connected anywhere except through the I2S connector. I did that so that there is no accidental ground loop somewhere.

 

[NIXIE62]

This is the power supply right now. No Graetz yet, I just connected everything to IEC GND, including the blind threads of the transformer. And one 0.63AT fuse was put in for both transformers, temporarily too.

 

[miro1360]

There is one small thing. On the I2S connector on the PCM63 board (pins 2,4,6 and 8) pin 8 says GND, but it is not connected to GND. I connected that from the bottom (pins 7 and 8) so as not to change the connector I used for the AD1865. I have no idea why it is not connected to GND and it says GND? I didn't notice before. This is important to me because the AK4113 and the JLS output part are grounded through that pin to DAC GND.

Thank you for pointing this out, I repaired the GND pin and here is new gerber for the PCM63P

 

[NIXIE62]

It has become difficult to obtain PCM63 at any normal price.

 

[lcsaba]

Do you have any idea where to buy genuine PCM63P-K at any (abnormal) price?

 

[NIXIE62]

There are some on ebay, but the price is really high. And are they genuine? Well, they probably are. But when I see $100+ for one piece secon hand (used), I don't look anymore.

https://www.ebay.com/itm/362255966791?hash=item5458236247:g:7AcAAOSwnipWXWqc&amdata=enc:AQAIAAAAwFTvm7DxMEq1Hb6LGx/Bg59ht5/xIPVV8m54mEYgnAhueMSy8mpVGJwEIpZCCtrI6Q8M1qI3nGO8cqD13GqYkkoQmjRzDh+O21HsMM2DSWTYSRCn/TOscFu9Epyo4i+iTlH1NUmKmVYzzhdOsi3sNKXnKjjdquuA+Yx1hLwK6xhBfjZqJ6y5TtynMTC/VXArJPRHalolGsMbz5GnypTpuQ7DBkRC1bRDbZnGEW6VH9RfAmS1Jq8F6fQsJValzKG+fw==|tkp:Bk9SR4SlwYaAYg

I bought the original PCM1702-K (dip16) on ebay Korea made, and they work. PCM1702 U (SMD) I bought two pairs from different sellers and they didn't work, I got a refund.

 

[lcsaba]

I avoid chips from chinese ebay sellers, especially desoldered ones. Once I saw a PCM1702 in 14 pin case.

 

[NIXIE62]

I've bought quite a few from them, and apart from these PCM1702s and some OPA2604 on one occasion, everything else was original and works as it should. If there are fake parts, there are as many as you want, over time I learned to avoid them.

And if I had listened to @miro1360, I wouldn't have bought a fake SMD 1702.

 

[lcsaba]

Seems that the only reliable option is the AD1862N from Rochester.

 

[BRN]

You should check to see if Ruach has anymore PCM 63PK chips available.

 

[lcsaba]

I already asked Rauch, but he disappeared without any note. Not any sign from him since last year.

 

[NIXIE62]

I queued up with him for PCM63 a long time ago, unfortunately that one no longer appears here. Last year I bought for myself and others (@skrstic , @djmilicic). It's all up and running. Now there are some people interested again, but the man has disappeared.

 

[NIXIE62]

Seems that the only reliable option is the AD1862N from Rochester.

That's how it turns out. Or gambling on ebay.

 

[lcsaba]

Maybe 8xAD1862N in balanced config as good or better than 4xPCM63P-K balanced?

 

[NIXIE62]

I really don't know that.

 

[NIXIE62]

In that price class you also have DDDAC with 8xPCM1794.

 

[lcsaba]

I will stick to NOS R/2R DAC-s, like the ones in this thread.

 

[Brijac]

Yeah no reliable pcm63 no more. I still have two more in case somewhere down the road chips used now go bad. Hope all is good with Ruach, such a kind guy.

There were two pcm63p from Ruach on Serbian sale site for 180 euro, and those have gone as well as i see now.

 

[NIXIE62]

What is this? Has anyone contacted the seller perhaps?
https://www.chip-components.com/instcok/1584109/PCM63P-K.html

 

[NIXIE62]

There are also funny things under that name. The description is good, the picture is wrong.
https://componentstockers.com/parts...to_analog_converter/texas_instruments/PCM63PK
https://pcxco.com/electronic-compon...tm_medium=cpc&utm_campaign=priority-part-list