DAC with DIR9001 & PCM1792A (fist digital project)
Hello everybody,
I'm an real newbie/rookie to digital circuits.
I'm trying to build a DAC myself with following components:
- DIR9001 from TI (digital audio interface receiver)
- PCM1972A from TI (24-bit, 192KHz sampling, advanced segment DAC)
- NE5534 from TI (audio output opamp's)
- LT1028 from LT (ultralow noise opamp's)
for input:
- SN74HCU04 from TI (hex inverter)
for powersupply:
- TL780 series from TI
- µA78M00 series from TI
I have tried to do some homework:
I have designed (actually stolen most of the parts
from others.
But i still have some questions before i start to make a print. And probably there are some (huge) mistakes in my circuits. (and in the brain too).
Let's just start with what i came up with.
(little note, in the main circuit , everything is hooked up the way i think it shoud.)
--> Powersupply:
5V, 3.3V analog and 3.3V digital.
http://dockonline.110mb.com/powersupply.JPG
First question about this circuit, are there mistake's? Can i connect the grounds together? or not? (with a ferrite bead?)
--> Input circuit:
from SPDIF
I stole this one from Heiko Purnhagen, thank you for this! (
link)
And i made this link
One question already here. are those capacitors
(10 and 0.1 µF )correct to "isolate" (not correct english) the ic from other ic's ?
--> Reciever circuit:
Basically out of the PDF from TI. link to pdf from DIR9001
i made this out of it: link
questions here , are digital and analog ground directly connected to each other?
--> The DAC circuit:
Also most of it taken from the pdf form TI. link to pdf
my version of the story: link
Putting it all together , the main circuit ((Best viewed on a 110 inch plasma screen) (with 8.1 surround))
What do you think of it? My main concern's are that i don't understand all the functions of the pins of the DIR9001 and PCM1792A. I hope they all would autodetect input characteristics.
Will it work? Are there mistakes, and where? Are there easy improvements?
I'm still working on a +- 15 voltage supply for the opamps.
Anny remark is welcome !
Thank you verry mutch for your time and patience. I will work the project further out with all your remarks...
Best regards,
Dock
Hello everybody,
I'm an real newbie/rookie to digital circuits.
I'm trying to build a DAC myself with following components:
- DIR9001 from TI (digital audio interface receiver)
- PCM1972A from TI (24-bit, 192KHz sampling, advanced segment DAC)
- NE5534 from TI (audio output opamp's)
- LT1028 from LT (ultralow noise opamp's)
for input:
- SN74HCU04 from TI (hex inverter)
for powersupply:
- TL780 series from TI
- µA78M00 series from TI
I have tried to do some homework:
I have designed (actually stolen most of the parts
from others.But i still have some questions before i start to make a print. And probably there are some (huge) mistakes in my circuits. (and in the brain too).
Let's just start with what i came up with.
(little note, in the main circuit , everything is hooked up the way i think it shoud.)
--> Powersupply:
5V, 3.3V analog and 3.3V digital.
http://dockonline.110mb.com/powersupply.JPG
First question about this circuit, are there mistake's? Can i connect the grounds together? or not? (with a ferrite bead?)
--> Input circuit:
from SPDIF
I stole this one from Heiko Purnhagen, thank you for this! (
link)
And i made this link
One question already here. are those capacitors
(10 and 0.1 µF )correct to "isolate" (not correct english) the ic from other ic's ?
--> Reciever circuit:
Basically out of the PDF from TI. link to pdf from DIR9001
i made this out of it: link
questions here , are digital and analog ground directly connected to each other?
--> The DAC circuit:
Also most of it taken from the pdf form TI. link to pdf
my version of the story: link
Putting it all together , the main circuit ((Best viewed on a 110 inch plasma screen) (with 8.1 surround))
What do you think of it? My main concern's are that i don't understand all the functions of the pins of the DIR9001 and PCM1792A. I hope they all would autodetect input characteristics.
Will it work? Are there mistakes, and where? Are there easy improvements?
I'm still working on a +- 15 voltage supply for the opamps.
Anny remark is welcome !
Thank you verry mutch for your time and patience. I will work the project further out with all your remarks...
Best regards,
Dock
