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Re: Si570 vs AD9851

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  • Goose
    I found this link helpful. I found it after reading the link you posted
    Message 1 of 13 , Dec 26, 2011
    • 0 Attachment
      I found this link helpful. I found it after reading the link you posted

      http://www.radio-electronics.com/info/rf-technology-design/pll-synthesizers/frequency-synthesiser-tutorial-basics.php

      Steve

      --- In softrock40@yahoogroups.com, Graham <planophore@...> wrote:
      >
      > the si570 and the AD9851 are very different devices.
      >
      > One, the si570 is a programmable osciallator, the other the AD985x
      > devices are DDS's. Each have their strengths and weaknessess.
      >
      > see here for a good discussion:
      >
      > http://www.hanssummers.com/ddssi570.html
      >
      > I have projects that I have worked on that have one or the other types
      > of devices mentioned. Given a choice, my preference is for the DDS type
      > device. But in the end, whatever gets the job done and properly is as
      > good a device as any other.
      >
      > cheers, Graham ve3gtc
      >
      >
      >
      > On Sun, 2011-12-25 at 15:49 -1100, rein0zn@... wrote:
      > > http://www.sdr-kits.net/USB/USB_Description.html
      > >
      > > 73 Rein W6SZ
      > >
      > >
      > > -----Original Message-----
      > > >From: Goose <bigoose@...>
      > > >Sent: Dec 25, 2011 3:43 PM
      > > >To: softrock40@yahoogroups.com
      > > >Subject: [softrock40] Re: Si570 vs AD9851
      > > >
      > > >It's $75 bucks on eBay.
      > > >
      > > >
      > > >--- In softrock40@yahoogroups.com, MIKE DURKIN <Patriot121@> wrote:
      > > >>
      > > >> I see one on ebay ....
      > > >>
      > > >> I think the Si570 will go 5x+ higher in frequency ... than 9851.
      > > >>
      > > >> To: softrock40@yahoogroups.com
      > > >> From: bigoose@
      > > >> Date: Mon, 26 Dec 2011 01:38:27 +0000
      > > >> Subject: [softrock40] Si570 vs AD9851
      > > >>
      > > >>
      > > >>
      > > >>
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      > > >>
      > > >> I am mucking around with my SoftRock, Arduino and attiny85's trying to learn by experimenting. Most of this stuff is new to me and I am having a ball.
      > > >>
      > > >>
      > > >>
      > > >> Since Si570 aren't all that easy to get online and buy, I came across the AD985x chips. I ordered an AD9850 board for less than $9. On EBay. There seems to be a lot of resources for the AD chips.
      > > >>
      > > >>
      > > >>
      > > >> Is there any significant performance differences between Si and AD chips?
      > > >>
      > > >>
      > > >>
      > > >> Steve
      > > >>
      > > >> n0SR
      > > >>
      > > >
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      > >
      > > ------------------------------------
      > >
      > > Yahoo! Groups Links
      > >
      > >
      > >
      > >
      >
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