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-   -   FS: AD 1862 N-J, 20-bit R-2R type D/A converter (http://www.diyaudio.com/forums/swap-meet/228836-fs-ad-1862-n-j-20-bit-r-2r-type-d-converter.html)

Vadim 28th January 2013 04:50 PM

FS: AD 1862 N-J, 20-bit R-2R type D/A converter
 
I have 10 AD 1862N-J D/A chips for sale. They are left over from a DAC project. 16-Pin DIP Package. Its a great 20-bit D/A chip to work with. Excellent linearity and THD with a curent output.

$20US each. Please PM if interested.

Nikitas 29th January 2013 11:09 AM

Could you share your project?

Vadim 29th January 2013 11:59 PM

Quote:

Originally Posted by Odysseas (Post 3346998)
Could you share your project?

Sure. A while ago, I built a 5 channel Dac for my Home Theater. There is a way to split the HDMI signal into 4 standard stereo SPDIF. From there you can build a multiple stereo Dacs as you see fit.

I chose to use a standard SC8416 for DIR and then I used ASRC from Analog Devices to up-sample to the higher rate. I used NPC 20-bit filter and some logic to invert the phase. Each channel used 4 AD1862 in a push-pull mode. I put most effort into an I/V converter, linear phase anti-aliasing filter and power supply. I tried to maintain at least 18-bit precision throughout.

AD1862 is a great chip; - you can trim it and actually see the LSB on the scope. I worked with more modern Sigma Delta Dac before and they were noisier. If I were building a DAC again, I would use 1862 before I go for 24-bit AKMs.


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