FS: AD 1862 N-J, 20-bit R-2R type D/A converter - diyAudio
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Old 28th January 2013, 03:50 PM   #1
Vadim is offline Vadim  Canada
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Default 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.
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Old 29th January 2013, 10:09 AM   #2
Nikitas is offline Nikitas  United Kingdom
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Could you share your project?
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Old 29th January 2013, 10:59 PM   #3
Vadim is offline Vadim  Canada
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Originally Posted by Odysseas View Post
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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