256Fs from 384Fs - How To

[machinow]

Hello, dear all,
while I'm drinking my coffe I'm thinking about how to make clock generation 256Fs from 384 Fs or 512 Fs from 768Fs etc.
I suppose I should use a PLL, but do not know which one exactly - I would like something simple.
I need 384Fs because :
most DF give higher BitClock to Word Clock ratio with 384Fs - DF170x series, which are the only aviable ones. They are for my ultimate design with 2 AD1862s I have got for 5 years now. I just want to make something usefull, although never repeateble, with them.
- 384 Fs is the necessary Sync if synchronisation to the CD is to be used
I need 256Fs because:
Some SR converters will need it /AD 1896, AD 1892/ to work properly. Iwant to design a DAC that can be suitable for most of equipment, not CD-only

PLL1705 may do the job from single 27MHz, but the 384Fs jitter won't be quite low /50pS/
What to do?

[machinow]

So now I'm going to ask a friend for a PLD for this function

[machinow]

Isn't there any suitable PLL??

[rfbrw]

Originally posted by machinow
Isn't there any suitable PLL??

http://www.standardics.philips.com/products/plls/

http://www.analog.com/en/prod/0,,770...DF4001,00.html

http://www.analog.com/en/prod/0,,770...9850%2C00.html

[gmarsh]

For the lowest jitter possible, a PLL/VCXO combination is the way to go.

My usual "recipe" for these projects is a National LMX2306 or Analog ADF4116 PLL, a VCXO, a well-designed loop filter (google for "Dean's Book") and a PIC12C508A to blast configuration data into the PLL on startup.

I've also used a MC145151 PLL in the past for this, the N and R counters on these are programmed via pin strapping which means you won't need to program a microcontroller. They've got a voltage output PFD though, which complicates loop filter design a little.

[DragonMaster]

384fs is 16.??MHz ?

I hope I will not have to use all of this to put DEM on my 1541A. My CDP controller works off 384fs I think.

[machinow]

Thanks for your suggestions,
I need low jitter only on 384Fs /16.9344MHz/
The jitter of the 256 Fs is not a problem, as it will be used for a few things.
I'm not clear about the overall design, though, it will be very hard one....... I'm thinking for a 4-layer PCB as well and a suitable DF