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DAC AD1853 with discrete output
DAC AD1853 with discrete output
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Old 4th August 2014, 07:33 PM   #1
damon1983 is offline damon1983  Russian Federation
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Default DAC AD1853 with discrete output

AD1853 "Semigor" DAC (Author: Igor Seminin) with discrete output in class A.

What do you think about this DAC?
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File Type: jpg Semigor 2 Schematic.jpg (457.1 KB, 641 views)
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Old 5th August 2014, 04:55 PM   #2
Kastor L is offline Kastor L  Europe
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Nice avatar.
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Old 5th August 2014, 05:09 PM   #3
damon1983 is offline damon1983  Russian Federation
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Quote:
Originally Posted by Kastor L View Post
Nice avatar.
thanks
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Old 5th August 2014, 05:13 PM   #4
damon1983 is offline damon1983  Russian Federation
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Quote:
Originally Posted by Kastor L View Post
Nice avatar.
What do you think about this DAC?
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Old 6th August 2014, 10:30 AM   #5
Kastor L is offline Kastor L  Europe
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I can not decipher schematics very well.

Personally I am skeptical to discrete op-amp's, since they usually have very high distortion compared to AD797, LME49990, LT1363, I think it's more realistic to use these chips biased to Class-A.

The AD1853 is interesting but the AD1866 is pure R-2R I think, I prefer to support the pure R-2R, thermometer, string DAC's, not the Sigma-Delta, they are just cheaper to produce that's all.

The schematic looks sort of mysterious and pretty, maybe it sounds nice, I have no idea.
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Old 6th August 2014, 01:30 PM   #6
damon1983 is offline damon1983  Russian Federation
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Quote:
Originally Posted by Kastor L View Post
I can not decipher schematics very well.

Personally I am skeptical to discrete op-amp's, since they usually have very high distortion compared to AD797, LME49990, LT1363, I think it's more realistic to use these chips biased to Class-A.

The AD1853 is interesting but the AD1866 is pure R-2R I think, I prefer to support the pure R-2R, thermometer, string DAC's, not the Sigma-Delta, they are just cheaper to produce that's all.

The schematic looks sort of mysterious and pretty, maybe it sounds nice, I have no idea.
I wanted to made AD1862 but it not produced.
I can get PCM1702U-K, but the price is 110 USD...
p/s: Jean Hiraga's Le Monstre 8W and Jean Hiraga's Super Class A 20W.
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Old 6th August 2014, 03:28 PM   #7
Kastor L is offline Kastor L  Europe
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What do you think of PCM63U-K?
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Old 6th August 2014, 03:57 PM   #8
damon1983 is offline damon1983  Russian Federation
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Quote:
Originally Posted by Kastor L View Post
What do you think of PCM63U-K?
It has been produced a long time ago. PCM1701 (as I know) was a little better.
p/s: too many "was"
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Old 6th August 2014, 05:13 PM   #9
Kastor L is offline Kastor L  Europe
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How does the PCM1702U-K compare to PCM1704U-K?

Are they directly switchable? Look at the Lingmei XA2 on Taobao.
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Old 6th August 2014, 05:27 PM   #10
damon1983 is offline damon1983  Russian Federation
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Quote:
Originally Posted by Kastor L View Post
How does the PCM1702U-K compare to PCM1704U-K?

Are they directly switchable? Look at the Lingmei XA2 on Taobao.
PCM1704 not good, than PCM1702, AD1862 much better. PCM1704 - 24 bit, but realy 20 bit. From BB the best DACs: PCM58, PCM63, PCM64, PCM65 and PCM1701.
Very good DAC was Ultra Analog D20400.

Good and best delta-sigma:
AD1853, PCM1794, SM5865, CS4328, CDX2562, NM64735.
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