(9958/59).
However, the quadruple DDS in the AD9959 is very attractive...
73,
Gérard
KD5NWA a écrit :
>< http://www.qrpradio.com/pub/Ham/SDR/SMT/SMT.html >
>
>It's not hard at all.
>
>At 02:41 AM 5/16/2006, Michael Rubitschka wrote:
>
>
>>Hi Jim
>>
>>These 9958, 9959 look verry promising but
>>I am afraid they are impossible to solder
>>without a reflow process.
>>
>>Anyone who has used this devices successfully ?
>>
>>Cheers
>>Michael
>>
>>
>>
>>>From: "mdgolfbum" <[EMAIL PROTECTED]>
>>>Reply-To: [email protected]
>>>To: [email protected]
>>>Subject: Re: Fw: [soft_radio] QSD direct to A/D
>>>Date: Mon, 15 May 2006 17:30:45 -0000
>>>
>>>This will be my first attempt using the DDS chips in my "own"
>>>design. Obviously I'm borrowing from everywhere I can. From what I
>>>understand the 9958, 9959 are better even with their 10bit vs 14bit
>>>DACs. I'm going on faith...
>>>
>>>BTW, take note of the release date of the datasheet. I was fooled by
>>>looking only at the rev level. The 9958, 9959 are from late 2005 vs
>>>2003 or so for some of the other chips.
>>>
>>>As far as soldering goes, I don't think AD will go backwards to fine
>>>pitch leads so it looks like learning to solder the LFCSP is the
>>>only way to stay up with the latest and greatest.
>>>
>>>The conductor does wrap around the side a bit. My first attempt will
>>>be to do the soldering pin by pin to that area. If necessary I'll
>>>try the paste and oven approach. I've got an oven I bought just for
>>>SMD work but haven't yet tried it.
>>>
>>>It's only money...
>>>
>>>73
>>>
>>>jim ab3cv
>>>
>>>--- In [email protected], [EMAIL PROTECTED] wrote:
>>>
>>>
>>>>Looks like the AD9951 part is gaining in popularity in a dual
>>>>configuration and I was wondering why the AD9859 part couldn't be
>>>>
>>>>
>>>used in
>>>
>>>
>>>>a dual configuration ? Does it not have the same lower spur
>>>>
>>>>
>>>level ?, it's
>>>
>>>
>>>>a 10bit DAC, cheaper, etc. I would also think the AD9958 dual part
>>>>
>>>>
>>>offers
>>>
>>>
>>>>too many package problems (for me anyway) with it's LFCSP vs the
>>>>
>>>>
>>>other
>>>
>>>
>>>>TQFP. Since my applications are digital and I look for the high
>>>>
>>>>
>>>speed
>>>
>>>
>>>>comparators like on the AD9952, what's a good external comparator
>>>>
>>>>
>>>to use
>>>
>>>
>>>>?
>>>>
>>>>73 Kees K5BCQ
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>>
>>
>>Yahoo! Groups Links
>>
>>
>>
>>
>>
>>
>
>
>Cecil Bayona
>KD5NWA
>www.qrpradio.com
>
>"Windows, the most successful software virus ever" Don Seglio Batuna
>
>
>
>
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>
>Yahoo! Groups Links
>
>
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>
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