DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 174 - diyAudio
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Old 3rd May 2012, 11:25 AM   #1731
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Lightbulb THS4032CD run hot

Quote:
Originally Posted by 68Spider View Post

The other thing that is getting hot is the THS4032CD opamp I am using. I could only get it in a surface mount package and had to mount it on a DIP8 socket. Not sure what the best thing is to keep it cool.
Proper power-supply decoupling Use a 6.8-F tantalum capacitor in parallel with a 0.1-F ceramic
capacitor on each supply terminal. It may be possible to share the tantalum among several amplifiers
depending on the application, but a 0.1-F ceramic capacitor should always be used on the supply terminal
of every amplifier. In addition, the 0.1-F capacitor should be placed as close as possible to the supply
terminal. As this distance increases, the inductance in the connecting trace makes the capacitor less
effective. The designer should strive for distances of less than 0.1 inch between the device power terminals
and the ceramic capacitors - taken from THS4032CD datasheet.
Maybe the problem is oscillation.
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Old 3rd May 2012, 12:09 PM   #1732
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[QUOTE]
Quote:
Originally Posted by bismuth View Post

With a little mod on this board (ACKS pin to HI see pic), you can also set it in auto mode for master clock.
Hi Bismuth!

ACKS and TST1 pin in manual setting mode fixed to the analog GND. When auto setting mode enabled ACKS and DVS0 pin must be fixed to the DVSS or DVDD.
Here I do not see anywhere that you're separated ACKS from the GND pins?
Thanks
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Old 4th May 2012, 11:35 AM   #1733
bismuth is offline bismuth  France
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[QUOTE=jazzbear;3010167]
Quote:

Hi Bismuth!

ACKS and TST1 pin in manual setting mode fixed to the analog GND. When auto setting mode enabled ACKS and DVS0 pin must be fixed to the DVSS or DVDD.
Here I do not see anywhere that you're separated ACKS from the GND pins?
Thanks
Hi Jazzbear!

On the AK4396 chip, the ACKS pin is pin 28 (top right one on my last picture), you have to desolder this pin from the board, a little bit tricky operation due to component size (I used a very thin wire and a blade to bend the pin gently). Then you solder a bridge from this pin to DVDD ref in order to set ACKS to "HI", I used a simple wire for that purpose (the brown one on the pic).
I left TST1 (pin26) untouched.
DFSO (pin 9) is connected to pin 9 of the 74HC04 by a track (untouched).
PDN (pin 4) is connected to pin 12 of the 74HC04 by a track that I wired to VCC (pin 14 of 74HC04 emplacment) with a soldered jumper (see pic).

It works like this but I may have miss something ?
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Old 4th May 2012, 04:51 PM   #1734
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Thanks for the size info gents!

Tony
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Old 4th May 2012, 08:36 PM   #1735
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Default I2S setup

Quote:
Originally Posted by ;Bismuth 3010167
Hi Jazzbear!

On the AK4396 chip, the ACKS pin is pin 28 (top right one on my last picture), you have to desolder this pin from the board, a little bit tricky operation due to component size (I used a very thin wire and a blade to bend the pin gently). Then you solder a bridge from this pin to DVDD ref in order to set ACKS to "HI", I used a simple wire for that purpose (the brown one on the pic).
I left TST1 (pin26) untouched.
DFSO (pin 9) is connected to pin 9 of the 74HC04 by a track (untouched).
PDN (pin 4) is connected to pin 12 of the 74HC04 by a track that I wired to VCC (pin 14 of 74HC04 emplacment) with a soldered jumper (see pic).

It works like this but I may have miss something ?
Hi Bismuth!

Page 8 in Datasheet:
TST1 This pin should be open(outputs Hi-Z in parallel mode)
TST2 This pin should be connected to DVSS(it should remain as is)

Everything else is done perfectly.

On bottom side:The line marked in red must be cut with a scalpel.
Attached Images
File Type: jpg AK4396 inplemet.JPG (64.5 KB, 648 views)
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TSUNAMI since an amplifier converts small waves into bigger wave.

Last edited by jazzbear; 4th May 2012 at 08:49 PM.
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Old 6th May 2012, 04:57 PM   #1736
bcmbob is offline bcmbob  United States
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Default Got My 96s Back

Hey, The new PCB (eBay along1986090 $18 w/ 3chips pre-soldered inc. shpng) and Dario's Upgrade BOM went together without a hitch - almost - and powered up properly on the first try. The sound is appearing balanced from both channels - but the "No Audio" LED doesn't light or flicker. I won't see that in the final build, but if anyone thinks it may indicate a problem that may fester, please let me know. I'm running the IsoTek Rejuvenation CD (As discussed over on the MyRef Fremen Edition thread) on it now. Looking forward to an enjoyable afternoon of 24/96 bliss.

P.S. During the down time I also ordered a dual WM8741 kit that accepts the Toner unit. It will be fun to compare.
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Old 6th May 2012, 05:02 PM   #1737
VT67 is offline VT67  Belgium
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My "second" board also arrived but I'm still waiting for my order from Parts Connexion to come through.

@bcmbob

Picture please.

Regards
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Old 6th May 2012, 05:51 PM   #1738
bcmbob is offline bcmbob  United States
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Default Here you Go

D9-1.JPG

D9-2.JPG

D9-3.JPG

No, I'm not that good. Shown after clean and polish.
D9-4.JPG

Running with new MyRef Fremen Edition Amps
D9-5.JPG
Dario's favorite low-cost eBay pot.
D9'6.JPG

D9-7.JPG

Semi-related - New massive 300VA toroids to be installed on FE build. At 7lb each will probablly dictate 2 mono-block chassis.
D9-8.JPG
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Last edited by bcmbob; 6th May 2012 at 05:55 PM.
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Old 6th May 2012, 06:03 PM   #1739
xslavic is offline xslavic  Moldova
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Default HIgh Fidelity Dac on the way

Dac Help, WM8805 + CS8421 + Dual mono PCM1794

...this should be better than most of the Ch. dac ,it uses the best in RECEIVER + the best in upscaller + 2x the Best DAC decoders DUal mono
Till now have dual Pcm1794 + Cs8421 upscaller
......................will ad wm8805 receiver ,A nice supply for Analog and maybe the Highest rated USB decoder
Remember PCB only, + have a Very nice Preamp, separate pcb Discrete + opamp LME49990

Need help
will post layouts ,please optimize when Ready

Last edited by xslavic; 6th May 2012 at 06:05 PM.
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Old 6th May 2012, 06:21 PM   #1740
VT67 is offline VT67  Belgium
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Thanks Bob.

@xslavic

What has your post to do with the Mini2496?

Regards
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