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Old 7th April 2006, 06:19 AM   #1
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Default Is There Still Life For Ad1862

Hi fellas,

The spec. of the now obsolete AD1862 still looks impressive to me today. Having done a fine sounding dac with AD1865, I'm thinking of taking this on next, to compare with '65 if anything. Have searched the forum but found no schematic. I would do a nos version with the trusting CS8412 up front, AD827 as I/V buffer and OPA2134 low pass filter. I have not done a mono chip before and am not quite certain of the connections. My first guess is

SDATA -> DATA
SCK -> CLK
FSYINC -> LE

These parallel to both AD1862 chips, no inversion.
Now is this worth a go or a waste of time? And have I got the connections right?

Cheers,

KK
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Old 7th April 2006, 07:20 AM   #2
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Should be ideal for those with one deaf ear.
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Old 7th April 2006, 07:50 AM   #3
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So it is wrong? Awful glad if you can point me the right way.
Cheers,
KK
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Old 7th April 2006, 08:30 AM   #4
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The AD1862 is a mono device. The CS8412 has a 2ch serial output. If you connect the two as outlined in your first post you will get the same channel in both devices.
You have to split the serial datastream into two simultaneous datastreams. There is a post on how to do it. Search for "nonos PCM1704" or something along those lines.
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Old 7th April 2006, 10:09 AM   #5
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Hi rfbrw,
Thanks for the key words. Found the two methods - shift registers and stop clock. I'll try the stop clock method first cause it's easier to understand.
Cheers,
K K
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Old 7th April 2006, 11:06 AM   #6
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Invert the Latch for one channel: one ear slightly more deaf than the other......

(sounds better than stopped clock)
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Old 7th April 2006, 11:27 AM   #7
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I wouldn't take any notice of Merlin if I were you. He uses the TDA1543.
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Old 7th April 2006, 12:22 PM   #8
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Talking Merlin?

Quote:
Originally posted by rfbrw
I wouldn't take any notice of Merlin if I were you. He uses the TDA1543.
Merlin? Who is that?

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Old 7th April 2006, 02:55 PM   #9
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Now reckon this:
Mark Levinson (Madrigal) switched from PCM1704 to AD1853
Accuphase is using AD1853
Jadis is using AD1853
Lindemann : AD1853.
Benchmark: AD1853
Is there some consensus among high-end manufacturers?
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Old 7th April 2006, 04:48 PM   #10
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I was looking at maybe buying the AD1853 evaluation board. I know that's not exactly DIY, but it is only $167 (if you can find one).
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