Amanero Isolator/Reclocker GB

[KlipschKid]

Acko - how about filling the uinused vias with solder - what dya think ?

For mkii, it'd be cool to add routing + pads for a 5x7 xo for rclk, and routing + pads for adp151 on the input side to allow 5v input. This'd make it more suitable for a wide range of DACs.

I'll be hoping to find time to test this next week - got 3 different isos - adum3440, iso7240 and NVE 715 to try, and 3 different xo's - 100 and 125 fox and 150 saw. Just too busy these days.

Anyone got theirs up and running yet ?

[SCompRacer]

Got my boards today! Gotta dust off the lighted magnifier.... Thanks Acko!

[acko]

Originally Posted by KlipschKid

Acko - how about filling the uinused vias with solder - what dya think ?

The layout is such that the currents circulate mainly on the top gnd plane (as the IC pins) and returns to power gnd on the top side. The bottom ground plane acts more like a shield, stitched with vias to the top gnd plane-all for HF performance. So I am not sure if you would get any further benefits in solder linking the vias but no harm doing so.

Originally Posted by KlipschKid

For mkii, it'd be cool to add routing + pads for a 5x7 xo for rclk, and routing + pads for adp151 on the input side to allow 5v input. This'd make it more suitable for a wide range of DACs.

Will consider... added to wishlist

[palmito]

My board arrived yesterday. Thanks much.

[DQ828]

Thanks for the answers on the FST3257G

[hochopeper]

Mine arrived today I think mine nearly spent a week in my work's internal mail system

Thanks Acko!

[shoom]

Hi Acko
My board arrived safely this morning.
Great work
Thanks

[bertchai]

Hi Acko,

Can i still get 1 PCB? Shipping options?

Many Thanks

[acko]

Originally Posted by acko

Yes, RCK is the reference clock for the flip-flop. The quality of the regenerated output signals depend on this clock and also how cleanly the flip-flops switch. If you skimp on these the overall SQ may not be up to expectations.

RCK can be from a separate clock or tied to DAC MCLK. When used separately RCK is async w.r.t to the audio signals (I2S/DSD) and actually modulates the pulse width of the signals if you look at the timing/switching carefully. To minimize the effects RCK should be running higher that the max Fs, higher the better accuracy of the outputs. e.g. for 24.576MHz of typical transport clock, we are looking at ~50MHz minimum. 100MHz even better. Of course you could go higher if the Flip-flops can take it. The S01 ~200Mhz max but the PotatoChip version (S02) can be fried up to 600MHz! If also appears that XOs have better stability and lower phase noise at higher freqs and also there are some discussions on this SAW technology being better? ..

More App Notes ...

[acko]

Originally Posted by bertchai

Hi Acko,

Can i still get 1 PCB? Shipping options?

Many Thanks

Unfortunately the current batch is all sold out. But you can add your details to the waiting list for the next batch here...