Hi Matt (and maybe Tom who started this thread last June), Further to Kim's note, we are also using the ASIAA e2v based board on ROACH 2, and we have already demonstrated 8 bit 5 GS/s quad interleaved operation on ROACH 2. It has two IF inputs, and can run in a dual channel 2.5 GS/s mode. The inputs have about 2 GHz analog bandwidth.
We're still measuring characteristics (passband shape, distortion, dynamic range, etc) and are still in the process of qualifying the board for our application. These cautionary remarks aside, it would seem to be a reasonably close approximation to (and in some respects a super-set of) the KAT-ADC. We have not hit sourcing problems so far with the e2v EV8AQ160 ADC on which it is based, and I have quotes from Digicom to produce it. Might this board serve your interests too? Be good to have more CASPERites on board. Jonathan On Feb 28, 2012, at 11:11 PM, Matt Dexter wrote: > 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<[email protected]> 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 >>>>>> >>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> >>>> >>>> >>> >> >> >
