inexpensive Frequency Generator DDS IC needed

Discussion in 'Electronics Resources' started by bassplayer142, Jul 26, 2010.

  1. bassplayer142

    Thread Starter Active Member

    Jan 2, 2007
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    Does anyone know of a good alternative dip chip that I could use to create a function generator with a micro. I'm looking for some kind of through hole package and all the old ones like MAX038 and others are out of date and very very expensive. Thanks
     
  2. sceadwian

    New Member

    Jun 1, 2009
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    What's your frequency range?
     
  3. bassplayer142

    Thread Starter Active Member

    Jan 2, 2007
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    I guess I should have been more specific. I would like to have a good range or maybe 1hz to 1mhz but if you have any ideas of lower then I welcome you to post them anyway. The output voltage and current I will deal with in another external circuit also.
     
  4. tom66

    Senior Member

    May 9, 2009
    2,613
    214
    Is through hole critical? You can get a SMD to DIP adapter on eBay for about US$3.

    Also, what waveforms? Arbitrary, sine, square, pulse, rectangle, ramp, triangle, etc.?

    Investigate using some memory with an external address bus as a DDS. You load the data in and just clock it out. Bytes go in and bytes come out, however fast it will go at. Really, there are very few simpler ways to do this.
     
  5. bassplayer142

    Thread Starter Active Member

    Jan 2, 2007
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    I'm going with the dip converter method. It never occured to me that something like that existed! :( Thanks a lot though, I found more then enough smd devices for the job.
     
  6. hgmjr

    Moderator

    Jan 28, 2005
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    When determining the clock speed that you use to clock the DDS, keep in mind that the clocking frequency input to the DDS should be at least ten times the maximum frequency you intend to generate.

    hgmjr
     
  7. ELECTRONERD

    Senior Member

    May 26, 2009
    1,146
    16
    Hey hgmjr,

    I haven't had any experience with DDS, why is that so?

    Thanks,

    Austin
     
  8. Papabravo

    Expert

    Feb 24, 2006
    10,138
    1,789
    Google and Wikipedia are your friends. They are good places to start, but as President Reagan said "Trust, but verify"

    http://en.wikipedia.org/wiki/Direct_digital_synthesizer
     
  9. bassplayer142

    Thread Starter Active Member

    Jan 2, 2007
    89
    0
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