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Old 23rd September 2011, 09:45 PM   #281
bcarso is offline bcarso  United States
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Quote:
Originally Posted by IngemarR View Post
Each of the 8 differential DACs has an output impedance of about 800 Ohms, but if you use the ESS9018 in stereo mode, like in the Buffalo2, you have about 195 Ohms, and 16mAp-p signal current max riding on top of 8mADC wehn using 0 Ohm load. In mono mode, the ESS9018 has its DACs in parallel giving twice the stereo mode current.

AFAIK, most people are using the ESS9018 in either mono mode or stereo mode.
I guess ESS is chary with their favors as far as datasheets etc., but without violating disclosure agreements, does anyone know what they recommend as I-V converters that, one hopes, preserve the touted 135dB DNR and -120dB THD numbers for mono mode?

Brad
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Old 23rd September 2011, 10:30 PM   #282
EUVL is offline EUVL  Europe
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Opamps.

Patrick
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Old 24th September 2011, 02:48 AM   #283
bcarso is offline bcarso  United States
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Opamps.

Patrick
How boring
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Old 24th September 2011, 08:52 AM   #284
EUVL is offline EUVL  Europe
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Indeed, though there are plenty of "experts" here who make money implementing data sheet circuits.


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Old 24th September 2011, 09:21 AM   #285
bcarso is offline bcarso  United States
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Can't resist a story but I'll keep it short: a former Harman employee stopped in to chat with another exec. one day and started by saying he wasn't really interested in a job (a strategy for being hired, reverse psychology?). I was in the room as he added that he did programming now and went on to say that hardware engineering no longer interested him, as it consisted in reading databooks and pasting app circuits together, whereas programming allowed for real creativity.

I couldn't contain myself, and replied that when I heard rubbish like that, I knew there would always be work for me. Needless to say we didn't become fast friends.
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Old 24th September 2011, 09:21 AM   #286
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The datasheet is released into the public, and you do not need to sign an NDA anymore. Ask the ESS distributor Ismosys about the ESS9018 datasheet.



/S

Quote:
Originally Posted by bcarso View Post
I guess ESS is chary with their favors as far as datasheets etc., but without violating disclosure agreements, does anyone know what they recommend as I-V converters that, one hopes, preserve the touted 135dB DNR and -120dB THD numbers for mono mode?

Brad
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Old 28th September 2011, 01:27 PM   #287
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has anyone built and listened to these configurations>?
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Old 4th October 2011, 07:43 PM   #288
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Really? No-one?
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Old 4th October 2011, 09:04 PM   #289
kevinkr is offline kevinkr  United States
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Pretty cool idea, thinking I'll check for the GB..

I'm running PCM1794A in mono mode (16mA pk, idle at 8mA)
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Old 5th October 2011, 10:35 PM   #290
kevinkr is offline kevinkr  United States
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Located 2SK170 at Mouser, any suggestion as to where I might find 2SJ74? So far no one here in the USA seems to have them..

Will try them with 1794 (output current range adjusted if necessary) and possibly in my sacd player at some point. Many other uses I can think of..

Spencer here is apparently an appliance reseller, where are they located and what is their full name?

Edit: Did a google search and found Spencer at FET Audio..
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