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Is there any DDS chip in DIP package?

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neazoi

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Is there any DDS chip in DIP package? All the DDS chips I have found cannot be soldered on a poor man's lab...
 

U can use DACs in ur circuit (they r available in DIP) and then implement DDS on it using microcontrollers
 
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    neazoi

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U can use DACs in ur circuit (they r available in DIP) and then implement DDS on it using microcontrollers

Yes, or even resistor networks to do the job. But you have to find a fast micro, because these pic16fxx types are too slow for generating a good quality sine wave in higher frequencies. For square wave though, they would be fast enough..
 

Suggestions
1)PIC 18F*** series with 32 MHz xtal cost 300+
2) AVR Mega series with 20 MHz xtal cost 100+
3) AVR tiny series (have an internal PLL 64 MHz) but can be used in PWM DACs only cost 50-100
 
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    neazoi

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The sinewave output will be of much lower frequency though, since you have to write at least 16 states for a full sincewave cycle. But it is a feasible alternative to these tiny, difficult-to-solder dds chips indeed
 

I am a poor man and I am able to solder AD9851BRSZ. Perhaps, it is not correct that we cant solder. It just calles for skill levels. you might spoil few dummy chips of TSSOP package for practice purpose. later you can work with real chip

I never had any special implements other than a temperature controlled mini solder station. most times i work with a normal 35watt mains soldering iron. at the time of soldering i remove the irons from mains. the body is connected electrically to ground of the pcb to prevent static

I do realize that the issues in European countries differ from tropical. the static is perhaps a main issue with low RH.
 
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    FvM

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    neazoi

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If you're preferring conventional assemby techniques, you can use small adapter boards with DIL pins to place SMD-only chips. All you need is a fine solder tip, solder wick for rescue, and possibly new glasses.
 
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    neazoi

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This is a little bit out of topic, but I have seen a kind of paste that is fed to the chip leads and then heated with a heat gun or somehow chemically processed to create solder to solder the chip, but I do not know how this paste is called.
I have a weller temperature controled mini station with a fine tip and solder but the finest packages I am able to solder by hand are the SSOP. the pins on these dds chips are far too close to ensure no excessive solder short ciruits between the pins :(
 

Some of ADI DDS chips are SSOP (0.65 mm spacing), newer are MSOP or QFN (0.5 mm). I'm used to solder these devices by hand for prototyping, and I know several electronic companies, where even small series are soldered "pin-by-pin" (up tp 240 pin PQFP FPGAs). But for soldering complete boards, I prefer solder paste and a hot plate (e.g. in the kitchen). Also a small electrical "pizza" oven is fine. A hot air gun is good for rework, but involves a certain risk to overheat PCB and parts, and also blowing away small ones.
 

That paste is called solder paste and it's used with a hot air station. You need to learn multi-lead soldering technique for fine pitch SMDs. It's surprisingly easy and only requires a few more tips for your existing iron, most importantly a bent conical tip. I use a knife tip for J leads and a bevel (sometimes called hoof) tip for gull wing leads. You can get by with a small screwdriver tip in a pinch. Here's a couple of video tutorials to give you an idea what's involved:

YouTube - Surface Mount Soldering 101

YouTube - Lead-Free SOIC 20 Installation | B.E.S.T Corporation
 

here is another link to FT232RL ( SSOP-28 ) soldered by hand.
YouTube - Soldering SMD SSOP-28
Sure that one skill. Thus I suggested practice with DUMMY chips on proto-boards .
@FvM: Nice to your caution, that some parts might blow by the HOT air gun. We can learn form that .
 

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