AA5381 ADC news.
Hello,
The AA5381 ADC project is now terminated for me.
It work perfectly, but i'm a little disappointed of lower performances, if i compare it
to my previous design with AK5394.
It's very hard to really compare ADC chips before building a real design, unfortunatly ADC vendors doesn't give same specs parameters. And often forget very important specs...
The main big interest of th ADC is to allow isolated the measurement to the computer, and it's very small size is very convenient.
If i summarize it's specs:
-----------------------
Analog to digital converter using Cirrus CS5381CZZ chip.
24 bits operation.
Selectable sampling rate by rear switch to : 48kHz/96kHz/192kHz
Selectable input type by rear switch to : Single-ended of differential
Selectable input coupling by rear switch to : AC of DC.
Digital offset cancellation to remove any offset in DC coupling by rear switch.
Input sensitivity of 7.07Vrms (20V peak to peak), with resolution of 420nVrms.
Low jitter master clock.
Ultra-low input bias current.(depends on input buffer used).
4 layers PCB with massive ground plane and power plane.
optical and coaxial digital outputs.
Need only +/-15V DC supply.
If DIYers are interested to build it, i will help them with pleasure.
Then I will sell circuit boards if enough DIYers want to build it.
For more facility, the PCB will be sale with the pre-programmed PLD.
Each buyer will receive all design files.
All DIYer really intersted to build one can just send me PM or answer in the thread to encourage me to create a new wiki to make a group buy for it...😛
Any others questions about the design and it's specs and more areof course welcomed ! 😉
Frex.
Hello,
The AA5381 ADC project is now terminated for me.
It work perfectly, but i'm a little disappointed of lower performances, if i compare it
to my previous design with AK5394.
It's very hard to really compare ADC chips before building a real design, unfortunatly ADC vendors doesn't give same specs parameters. And often forget very important specs...
The main big interest of th ADC is to allow isolated the measurement to the computer, and it's very small size is very convenient.
If i summarize it's specs:
-----------------------
Analog to digital converter using Cirrus CS5381CZZ chip.
24 bits operation.
Selectable sampling rate by rear switch to : 48kHz/96kHz/192kHz
Selectable input type by rear switch to : Single-ended of differential
Selectable input coupling by rear switch to : AC of DC.
Digital offset cancellation to remove any offset in DC coupling by rear switch.
Input sensitivity of 7.07Vrms (20V peak to peak), with resolution of 420nVrms.
Low jitter master clock.
Ultra-low input bias current.(depends on input buffer used).
4 layers PCB with massive ground plane and power plane.
optical and coaxial digital outputs.
Need only +/-15V DC supply.
If DIYers are interested to build it, i will help them with pleasure.
Then I will sell circuit boards if enough DIYers want to build it.
For more facility, the PCB will be sale with the pre-programmed PLD.
Each buyer will receive all design files.
All DIYer really intersted to build one can just send me PM or answer in the thread to encourage me to create a new wiki to make a group buy for it...😛
Any others questions about the design and it's specs and more areof course welcomed ! 😉
Frex.
Did I meet something wrong with the setting?
This is the noise floor of ADC AK5393
and this is my R-2R VCS volume contorl module noise floor
they are nearly the same!
then, I put my PCM1702 DAC to the test system: PCM1702 DAC - R-2R VCS attenuator - AK5393 - SOUNDCARD
I got the noise floor of the DAC:
When I change the DAC to another TDA1541, the result is:
Attachments
Well, if you measure an open input ADC, you should get some 50Hz pickup at ca. -140dB.
Plot 3 & 4 look ok.
BR
Gary
Plot 3 & 4 look ok.
BR
Gary
Hi,
I was wondering if there was a change to have a similarly stellar DAC to complete the measurment set up. I am into analog measurment (acoustic)
Anyone have some schematics?
Cheers
Mickael
I was wondering if there was a change to have a similarly stellar DAC to complete the measurment set up. I am into analog measurment (acoustic)
Anyone have some schematics?
Cheers
Mickael
Oscillators pcb arrived!
Hello,
Some news for the group buy of oscillator PCB.
I have receive today PCBs by Fedex.
Again a very good job of pcbcart.
Unfortunatly, i had need to pay little customs fees..
Fortunately, it's only 15.96€ to be divised by the number of board
giving 1.3€ for each board ~1.63$ (today 😀).
I'm sorry for that..
(Despite many worldwide buy, i really don't know yet how French customs work !....)
Each buyers will receive very soon (this week-end) a e-mail with
a zip file wich include all needed files to build the oscillator.
I'll send also a copy of the Fedex invoice for customs.
I hope to ship all circuit-board in the next week, as soon as you
will paid this little extra cost.
For finished this post, a little picture 😉
Frex.
Hello,
Some news for the group buy of oscillator PCB.
I have receive today PCBs by Fedex.
Again a very good job of pcbcart.
Unfortunatly, i had need to pay little customs fees..
Fortunately, it's only 15.96€ to be divised by the number of board
giving 1.3€ for each board ~1.63$ (today 😀).
I'm sorry for that..
(Despite many worldwide buy, i really don't know yet how French customs work !....)
Each buyers will receive very soon (this week-end) a e-mail with
a zip file wich include all needed files to build the oscillator.
I'll send also a copy of the Fedex invoice for customs.
I hope to ship all circuit-board in the next week, as soon as you
will paid this little extra cost.
For finished this post, a little picture 😉
Frex.
Nice looking boards! Frex, I will pay my share of customs fee as agreed. Are you going to send an invoice or should I just issue a ppal payment?
Thank you Carpin and ikoflexer,
For the fee i don't send invoice, just send directly 1.3€ for each board you have
ask to my paypal e-mail.
I will update the wiki for buyers who have done the payment and also when shipping where done.
Frex.
For the fee i don't send invoice, just send directly 1.3€ for each board you have
ask to my paypal e-mail.
I will update the wiki for buyers who have done the payment and also when shipping where done.
Frex.
Adc
Hi
Yes I ame interested.
Even without enclosure and with TentLab clock.
What is your price?
Joost Kist
Holand
futura.nova@wxs.nl
Hi
Yes I ame interested.
Even without enclosure and with TentLab clock.
What is your price?
Joost Kist
Holand
futura.nova@wxs.nl
Oscillator PCB
Hi Frex
Is there any left Oscillator PCB?
If so i'd be interested in one.
Thx
Zsolt
Hi Frex
Is there any left Oscillator PCB?
If so i'd be interested in one.
Thx
Zsolt
Hello everybody,
zsaudio, i have answered you by PM.
cocolino, sorry, but i have no more PCB available. 🙁
Kist, for the AA5381 ADC, i don't sell anything.
I had just ask if DIYers would be interested to get a bare circuit board (PCB).
If at least 10 DIYers are interested i could organize a group buy for them,
with a very good price.
At this time you are alone in the list. 🙂
Thank you very much for your interest !
Frex.
zsaudio, i have answered you by PM.
cocolino, sorry, but i have no more PCB available. 🙁
Kist, for the AA5381 ADC, i don't sell anything.
I had just ask if DIYers would be interested to get a bare circuit board (PCB).
If at least 10 DIYers are interested i could organize a group buy for them,
with a very good price.
At this time you are alone in the list. 🙂
Thank you very much for your interest !
Frex.
ooops
Hi Frex
Sorry for that but i have not received any e-mail.
I hope there will be enough interest to organize a new group buy.
This PCB looks awesome.
Zsolt
Hi Frex
Sorry for that but i have not received any e-mail.
I hope there will be enough interest to organize a new group buy.
This PCB looks awesome.
Zsolt
zsaudio,
i have send you a Private Message at DIYaudio yesterday.
Not at your personnal mail.
Frex.
i have send you a Private Message at DIYaudio yesterday.
Not at your personnal mail.
Frex.
Frex,
Since there seems to be quite some interest in your oscillator (me including as in earlier PM), I wonder if you would be so kind to make the information (Gerber, schematics, etc.) available so that maybe one of the late comers can organise a 2nd round ?
Patrick
Since there seems to be quite some interest in your oscillator (me including as in earlier PM), I wonder if you would be so kind to make the information (Gerber, schematics, etc.) available so that maybe one of the late comers can organise a 2nd round ?
Patrick
If the list is ready to start for additional PCBs please add me to the list.
Thank you
AR2