Best spec ADC Chip currently.... ??

[Hotmailhero]

@IVX Thanks, still have another question about ES9822:
The REF_L, and REF_R, are internal low noise regulator output pins. But I found even I did not write register to eanble these two regulators. The ADC still work, and I can find that there is internal bias voltage on VIN+, VIN- pins. So the bias voltage performance will determine the ADC performance. But I dont know why there is no bias voltage pins, like Cirrus Logic chip's VCOM pin.

 

[IVX]

Hotmailhero, so, what your question is? Did you try to ask ESS yet?

 

[Hotmailhero]

Hotmailhero, so, what your question is? Did you try to ask ESS yet?

Yes, I need ask ESS， thanks.

 

[IVX]

a good idea to ask them for the demoboard schematic, as an example of real implementation. I don't use that DAC outputs, and the demoboard doesn't use that as well, no idea why. Just 10k/10k dividers to make half_VDD.

 

[IVX]

Regarding the noise modulation. Yesterday I did prepare a new version of the 1kHz LPF supposed to be after Cosmos DAC outputs to extreme cleaning up the DAC output in case if that is used as a sine source for measurement purpose. The Cosmos ADC reading THD+N of that super-clean sine as -120.6/-123db 2ch/1ch mode. Even my AP SYS2522 which never shows loopback <-117.5db, with that sine source shows -120.3db. Cosmos APU notch is still limited on THD+N -128db due to its noise, would be nice to improve that down to -130db because I have a feeling that even ESS doesn't really know how low distortions+noise of their products

 

[JensH]

What numbers do you get, if you only measure THD, without the noise?

 

[IVX]

THD-N .00003% -130.4db

 

[JensH]

Thanks. Very nice result

 

[DWPress]

@IVX do you have any versions of your ADC available yet? Very interested, tried google, no luck.

 

[IVX]

DWPress, we prepare for the production, during 1 month Comos ADC and Cosmos APU will be released.

 

[Evgeniy]

Cosmos ADC and APU look like cost effective solutions for mobile measurement (in my case), and a useful addition even for owners of the AP. So where can I order these? You maintain a pre-order or waiting list?

+1.
Same question.

 

[IVX]

Evgeniy, the Cosmos is the E1DA products-line, hence, it will be available in our Aliexpres store, as usual.

 

[Evgeniy]

The Cosmos ADC reading THD+N of that super-clean sine as -120.6/-123db 2ch/1ch mode. Even my AP SYS2522 which never shows loopback <-117.5db, with that sine source shows -120.3db.

What's ADC you used in it ?

How user can manage attenuation in preamp ?

 

[SylphAudio]

Evgeniy, the Cosmos is the E1DA products-line, hence, it will be available in our Aliexpres store, as usual.

Nice, looking forward to this product, I was about to replace my Motu M4 with ultralite mk5 for the ADC performance, then I saw this..

 

[IVX]

jlesterp, Cosmos ADC is plain ADC not an interface like your Motu. I designed that to calibrate my 9038S/9038D DACs + AUX input for power-amps measurement up to 30Vrms. Cosmos ADC has quite low input impedance especially at the highest gain range down to 680ohm. Not every mic or guitar could be recorded with Cosmos ADC. To be honest, I see no reason to use precise ADC in the recording process, no one musician's source like mic/guitar needs >16bit resolution. hence any kinda Motu is ok.

 

[SylphAudio]

Yup I'm using my motu M4 for amplifier measurements.

jlesterp, Cosmos ADC is plain ADC not an interface like your Motu. I designed that to calibrate my 9038S/9038D DACs + AUX input for power-amps measurement up to 30Vrms. Cosmos ADC has quite low input impedance especially at the highest gain range down to 680ohm. Not every mic or guitar could be recorded with Cosmos ADC. To be honest, I see no reason to use precise ADC in the recording process, no one musician's source like mic/guitar needs >16bit resolution. hence any kinda Motu is ok.

 

[IVX]

jlesterp, oh, in that case, Motu's performance looks like a joke vs Cosmos BTW, your Motu will overtake Cosmos ADC if being using with the notch filter as Cosmos APU. Very cheap solution with unbeatable performance, kind of microscope for ADC.

 

[IVX]

The latest renders and proto pics

 

[HpW]

Evgeniy, the Cosmos is the E1DA products-line, hence, it will be available in our Aliexpres store, as usual.

The sore is named as, IVX shows only pans for widens

 

[tjstyle]

@IVX No single-ended input?