Thanks Kim.
On Tue, 28 Feb 2012, Kim Guzzino wrote:
Matt,
ASIAA and I have the 8bit 5Gsps E2v board made by ASIAA running at
4Gsps into a ZDOK on a ROACH1. Our ROACH1 has the SX95 chip and uses the
ddr iserdes inputs. the chip is spec'd to run the io's up at 1Gsps and
seems to work fine at that speed.
We are characterizing it now and will be running it at 5Gsps into a
Roach2. So I don't think you should have problems running the KatADC at
those speeds.
Kim Guzzino
On Tue, 2012-02-28 at 19:11 -0800, Matt Dexter wrote:
Hi all,
Is there any news w/ regard to the 4 GSPS version of the
KatADC using the uptested Natl Semi S7002396 ADC IC ?
Are people using them with Roach2 or other hosts ?
Cost ?
Thanks,
Matt
On Wed, 1 Jun 2011, Dan Werthimer wrote:
hi tom,
regarding pushing the KatADC from 2*1.5 Gsps to 4 Gsps:
it will be difficult, perhaps impossible, to
move 4 Gsps 8 bit ADC data through a single zdoc connector
into roach I. each of the 32 bit lvds lanes would
have to operate at 1 Gbit/sec, and we've never
tried that on Roach I. the most we've achieved
is 750 Gbit/sec per LVDS pair (using the 3 Gsps ADC board).
we've interleaved a pair of these 3 Gsps ADC's to
get 6 Gsps, using both ZDOC connectors on roach I.
on roach II, it should be possible to input 1Gb/sec
on each LVDS pair (you'd probably want to clock the FPGA
at 500 MHz and use DDR inputs), and then you
could get a 4 Gsps 8 bit ADC on each ZDOC connector.
best wishes,
dan
On 06/01/2011 12:11 PM, Francois Kapp wrote:
Hi Tom,
The 4GSPS version of KatADC is based on an "up-tested" version of the
ADC08D1520, which is designated S7002396. It is unclear whether this
will be released as a commercial product by National - a few inquiries
to them couldn't hurt the cause. So far we have only received the
one. The rest of the board is the same as the wide-band front-end
KatADC version, which is the standard version that Mo builds (i.e.
with BOM:
http://casper.berkeley.edu/wiki/images/7/71/KATADC1.3BOM_HF_Build.pdf).
If you can extract a chip from National it should be a simple matter
to get one built.
Regards,
Francois
On Wed, Jun 1, 2011 at 8:26 PM, Tom Kuiper<kui...@jpl.nasa.gov> wrote:
On 06/01/2011 11:19 AM, John Ford wrote:
I'd like to know more about this ADC on the hardware wiki page under
KatADC:
Dual 8-bit 2.0GSPS (or Single 8-bit 4.0GSPS), National Semiconductor
ADC08D1520/S7002396 ADC, RF Front-End
However, the KatADC page doesn't seem to have any information about it.
Can someone direct me to or send me information about this?
Hi Tom. The data sheet's linked here:
http://www.national.com/ds/DC/ADC08D1520.pdf
That's the original 3 Gsamp/s version. I was asking about the 4 Gsamp/s
version (see the /S7002396?). This data sheet probably predates the newer
version.
Cheers
Tom
From
https://casper.berkeley.edu/wiki/KatADC
John
Many thanks,
Tom
--
I or me? http://www.oxforddictionaries.com/page/145
--
I or me? http://www.oxforddictionaries.com/page/145
