ATA signal integrity over dual PCBs

  • Thread starter Thread starter galapogos
  • Start date Start date
G

galapogos

Hi,

I'm wondering if there will be severe signal integrity issues if I use
a 2mm pitch 2x22 socket and header combination to connect 2 PCBs
together, assuming I still adhere to the impedance of the ATA signals
on the PCB and keeping the trace lengths within ATA specs? In total
there will be 3 connectors - a pin header on the ATA host side PCB, a
pin socket on the ATA device side PCB, and another pin socket on the
ATA device side PCB that connects to the actual HDD.
 
galapogos said:
Hi,

I'm wondering if there will be severe signal integrity issues if I use
a 2mm pitch 2x22 socket and header combination to connect 2 PCBs
together, assuming I still adhere to the impedance of the ATA signals
on the PCB and keeping the trace lengths within ATA specs? In total
there will be 3 connectors - a pin header on the ATA host side PCB, a
pin socket on the ATA device side PCB, and another pin socket on the
ATA device side PCB that connects to the actual HDD.
Click to expand...

What do you need specs for if you can't expect them to "work".

Ever heard of laptops and laptop harddrives?
 
What do you need specs for if you can't expect them to "work".

Ever heard of laptops and laptop harddrives?
Click to expand...

Well, I just just worried that the extra connectors would cause
undesirable reflections/ringing and other related SI issues.
 
Well, I just just worried that the extra connectors would cause
undesirable reflections/ringing and other related SI issues.
Click to expand...

I agree that that could be an issue. But typically, if
this is an 3.5" to 2.5" adapter, it works. In fact these
things work when connected to an ata cable, so there should be
some margin.

Arno
 
I agree that that could be an issue. But typically, if
this is an 3.5" to 2.5" adapter, it works. In fact these
things work when connected to an ata cable, so there should be
some margin.

Arno
Click to expand...

You make a good point. I hadn't thought about the adapters. My
application wouldn't have a cable, but will add a 2 connectors, so I
guess it should work. I wonder how "clean" the ATA signals are after
the adapter...
 
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