Hi,
In one of the projects on Polish DIY audio forum (DAC project WM8804-SM5813-AD1865) we tray to replace old digital filter SM5813 to newer DF1704.
Because we want to play 24/96.
Ready to buy adapters are expensive, so we decided to build your own.
I designed PCB for adapter (all funcion of DF1704 are configured by solder jumpers). Additionally, there is place for 2 capacitors and reset chip MCP100.
PCB cost will be about 3$-4$ + shipping.
If anybody interested the spreadsheet is here:
https://docs.google.com/spreadsheet/ccc?key=0AkQmfvyUXkeXdEVIOXYxc1VaazdrR3NNMUVsUWZudWc
GB for PCB is worldwide, for DF1704 only for Poland.
GB will be closed 30.11.2012
Best regards
JarekC
In one of the projects on Polish DIY audio forum (DAC project WM8804-SM5813-AD1865) we tray to replace old digital filter SM5813 to newer DF1704.
Because we want to play 24/96.
Ready to buy adapters are expensive, so we decided to build your own.
I designed PCB for adapter (all funcion of DF1704 are configured by solder jumpers). Additionally, there is place for 2 capacitors and reset chip MCP100.
PCB cost will be about 3$-4$ + shipping.
If anybody interested the spreadsheet is here:
https://docs.google.com/spreadsheet/ccc?key=0AkQmfvyUXkeXdEVIOXYxc1VaazdrR3NNMUVsUWZudWc
GB for PCB is worldwide, for DF1704 only for Poland.
GB will be closed 30.11.2012
Best regards
JarekC
Attachments
Hi JarekC,
Did you or others from the Polish DIY forum managed to test AD1865 with DF1704 at higher sample rates: 88.2/96KHz? and maybe did some measurements?
I'm asking this because I'm concerned about timing constraints of AD1865 that I'm facing in another project.
Let me briefly explain my concerns:
According to AD1865 datasheet page-7, figure-9 the clock period timing should be >74.1ns which means <13.5MHz, while DF1704 datasheet page-8 says that BCKO is fixed at 256fs or 192fs which is 24.576MHz or 18.432MHz for 96KHz - both much higher then what AD1865 timing diagram asks for.
On the other hand in AD1865 datasheet same page-7 says: "The minimum clock rate of the AD1865 is at least 13.5 MHz" which is in contrast with the timing diagram of CLK period >74.1ns.
I myself can run AD1865 with CLK up to 24.576MHz but don't have measuring instruments to test whether it's working correctly or it's missing some bits.
Thanks,
Zsolt
Did you or others from the Polish DIY forum managed to test AD1865 with DF1704 at higher sample rates: 88.2/96KHz? and maybe did some measurements?
I'm asking this because I'm concerned about timing constraints of AD1865 that I'm facing in another project.
Let me briefly explain my concerns:
According to AD1865 datasheet page-7, figure-9 the clock period timing should be >74.1ns which means <13.5MHz, while DF1704 datasheet page-8 says that BCKO is fixed at 256fs or 192fs which is 24.576MHz or 18.432MHz for 96KHz - both much higher then what AD1865 timing diagram asks for.
On the other hand in AD1865 datasheet same page-7 says: "The minimum clock rate of the AD1865 is at least 13.5 MHz" which is in contrast with the timing diagram of CLK period >74.1ns.
I myself can run AD1865 with CLK up to 24.576MHz but don't have measuring instruments to test whether it's working correctly or it's missing some bits.
Thanks,
Zsolt
DF1704 adapter
Hi Jarek,
May I ask you about the DF1704 adapter availability? I would need 1pc.
Brg, Janos Redai
Hi Jarek,
May I ask you about the DF1704 adapter availability? I would need 1pc.
Brg, Janos Redai
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