8 channel AD converter idea/discussion

[Andy Peters]

[quote author="TobWen"][quote author="jdbakker"]I also said that the faster the logic family (more precisely: the faster the rise/fall times), the more noise it will generate. You want logic that is just fast enough (within the full operating rate, naturally), but no faster. I have not seen any evidence that LVC hits that spot.[/quote]

I've read this again:
Aren't good fast rise/fall times important for clocking-signals?[/quote]

Yes, but you don't want "too fast" because you'll have EMI problems as well as signal-integrity problems (ringing/overshoot leading to double-clocking and worse).

Also, a series termination resistor at the driver and matching the driver output impedance to the PCB trace goes a long way towards mitigating transmission-line effects.

A friend of mine also added:
When choosing full synchronisation, it might happen that meta-stability appears between SCKL and LRCK. The flank-direction of SCKL is important.

"Flank-direction" ??? What is that?

-a

 

[TobWen]

[quote author="Andy Peters"]"Flank-direction" ??? What is that?-a[/quote]

Sorry, I mean edge-direction (as "edge" in "edge steepness"; slew rate).

 

[living sounds]

The upcoming Aphex 142 converter uses the CS5368.

I had one on order but decided to get a Lynx for various reasons. Still, the 141/142 might prove good value for the money.

 

[Di_Sousa]

Any news on this project?