For the ASIAA designed 8-bit ADC using e2v EV8AQ160 at 5GS/s we at CfA (chiefly Bob Wilson, Nimesh Patel and Rurik Primiani) have done a fair amount of testing using both swept sine waves and wideband noise as input. There are measurements of frequency response, SFDR, THD, noise power ratio, and the impact of core alignment (on a single board) on these quantities posted here (there is more detail under the links):
https://www.cfa.harvard.edu/twiki/bin/view/SMAwideband/AnalogToDigital We have no restriction on sharing codes, if there is interest get in touch for a pointed. Jonathan On May 29, 2012, at 9:44 AM, Paul Demorest wrote: > Hi Ryan, > > We'd be interested in learning more about your interleave-fixing technique as > well. If JPL will let you tell us about it that would be great. If you > can't release detailed code/etc, even a high-level description of the > approach would be nice. > > Cheers, > Paul > > On Mon, 28 May 2012, Ryan Monroe wrote: > >> I've used the ADC083000s before and the interleave can be pretty bad-- as >> much as 15% difference across their 3GHz spectrum! You should expect better >> performance because you only need to tune for 1GHz of bandwidth however. I >> can't speak for the other parts. >> >> I have a technique I've developed which cancels out all cross-board ADC >> interleaving issues. I've been trying to get JPL to let me release it to >> the public domain: I'll see what I can do, and please tell me if you have >> issues. >> >> --Ryan Monroe >> >> >> >> >> On 5/28/2012 5:47 PM, Dan Werthimer wrote: >>> hi bill, >>> i think all the boards you mention have analog bandwidth out to 2 GHz, >>> so they should work well for your 1-2 GHz band. >>> the asiaa board is the least expensive, but this board does not have >>> programmable attenuators like the Kat-ADC. the asiaa board can be used as >>> a single 5 Gsps ADC, or as a dual 2.5 GHz ADC. we have used the asiaa board >>> as a single 5 gsps adc, and it works quite well. but we have never tested >>> it as a dual adc - perhaps others reading this email can give you advice >>> about using it in dual mode. if you are using roach I, you can't get the 8 >>> bit version of the asiaa board working at the full 5 gsps. if you are using >>> roach II, you can use it at 5 Gsps. >>> best wishes, >>> dan >>> On Thu, May 24, 2012 at 11:30 AM, Bill Petrachenko<[email protected]> wrote: >>>> I'm designing a digital data acquisition system using a ROACH1 board. I >>>> need >>>> to sample two Nyquist zones at 1024-2048 MHz. It appears that in the Casper >>>> group of products, a pair of ASIAA, ADC1x3000-8, or KatADC boards would >>>> work >>>> well and nicely interfaced to a single ROACH1 board (although the ASIAA >>>> board is not mention explicitly on the web-site). Is there any reason to >>>> choose one board over another? The gain adjustment stage is attractive on >>>> the KatADC but the performance of the ADC1x3000-8 chip seems marginally >>>> better at 2-GHz input frequency. The e2v chip seems less established than >>>> the National chips. Is interleaving or calibration an issue for any of the >>>> chips? >>>> I'd be grateful for any opinions on this. >>>> Thanks, -Bill. >> >> >
