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AK4497 won't be Flagship anymore
AK4497 won't be Flagship anymore
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Old 11th December 2018, 11:02 AM   #31
Terry Demol is offline Terry Demol  Australia
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Quote:
Originally Posted by abraxalito View Post
Preliminary datasheet attached, 10 pages.
Switched unity weighted resistor network, same as Sabre.
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Old 12th December 2018, 08:11 AM   #32
Extreme_Boky is offline Extreme_Boky
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Quote:
Originally Posted by diyralf View Post
A lot of audio foolish blah blah
Whoa...!!! An elaborate analysis of what AK has to say of their new design. If you actually cared to read...

"I also configured an environment that can actually measure -124 dB"

Did you see the power supply they built & the decoupling around that AK4499?

Have a look (attached), and then add a third "blah" to your comment. Post it so that everyone can see.
Attached Files
File Type: pdf AK4499 power supply, PCB & decoupling.pdf (139.4 KB, 77 views)

Last edited by Extreme_Boky; 12th December 2018 at 08:20 AM.
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Old 12th December 2018, 08:46 AM   #33
Dimdim is online now Dimdim  Greece
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AK4497 won't be Flagship anymore
Indeed. That was a nice article. It's very interesting to see what the reference designs actually look like.

It's looking like they are using 8 individual power supplies. It's making my 8 power supply dual 4490 look "normal".
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Old 12th December 2018, 10:29 AM   #34
diyralf is offline diyralf
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Quote:
Originally Posted by Extreme_Boky View Post
Whoa...!!! An elaborate analysis of what AK has to say of their new design. If you actually cared to read...

"I also configured an environment that can actually measure -124 dB"

Did you see the power supply they built & the decoupling around that AK4499?

Have a look (attached), and then add a third "blah" to your comment. Post it so that everyone can see.

I don't doubt that AKM has good engineers who develop very good products. In recent years, however, even serious companies are starting to use these stupid marketing buzzwords to fool their customers.
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Old 12th December 2018, 03:50 PM   #35
Shinja is offline Shinja  Japan
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from the datasheet
>SR DAC Convert multi bit output of ΔΣ Modulator into analog signal. This block consists
of a switched resistor DAC

4499 output is not current source... So what is the IREF for? may be for calibrating full scale output current, like sabre, rough chip to chip full scale level tolerance?
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