Can SOIC components be used with DIP?

sagarverma · 23rd June 2006, 12:19 PM

Hello
I have SMT opamps which i would like to use.
but i have only opamps in SMT packages and all other components like bypass caps,res. and other caps etc are all the classic thru hole.
can i use the other components with the SMT ICs?
Even the 100nf cap for supply bypass is bigger than the SMT IC.

Sagar

cetoole · 23rd June 2006, 12:34 PM

Probably the easiest way is using Brown Dog adapters. I have used them a few times, and they are pretty good. You could also bend the leads out and solder them to a dip socket, or airwire it.

jackinnj · 23rd June 2006, 12:42 PM

you can also use copper foil -- the adhesive variety from 3M -- with a hobbyist knife cut the foil into a thin strip -- apply just as the doctor ordered.

i use SMT ceramic caps in DIP designs for bypass caps -- just tack to the solder pad of the DUT, other end to the ground plane.

sagarverma · 23rd June 2006, 12:49 PM

what i exactly want to know is.....the opamp will need bypassing,since i dont have SOIP caps so can i use the regular caps for that?

Sagar

jackinnj · 23rd June 2006, 12:55 PM

100nF and 10nF ceramic bypass caps are on 100 mil lead spacing -- no reason that they can't be used -- here's a hint from Analog Devices -- the ground connection for the bypass cap should be as short as possible -- elsewise it's a radiator --

paulb · 23rd June 2006, 12:56 PM

Quote:

Originally posted by sagarverma
what i exactly want to know is.....the opamp will need bypassing,since i dont have SOIP caps so can i use the regular caps for that?

Sagar

Yes.

Wynand · 23rd June 2006, 01:02 PM

You can mix them as you want/need to.

Take the Mute resistor on the LM3886/876 chips as an example.
Most use a 1206 size SMD resistor.

Wynand · 23rd June 2006, 01:05 PM

The only problem I've found is that if you use for example a SMD opamp and push-through caps and you design your own PCB. The soldering of the caps is a problem, unless you have the options of having the PCB professionally made, or if you don't mind soldering the caps/opamp on the bottom side of the pcb

Wynand · 23rd June 2006, 01:07 PM

On the topic, does anyone know how to make diy vias?

It's easy to make pads on both sides of the pcb and joining them with a peice of wire, but my problem is having vias under, for example, an SMD opamp. The height of the solder will lift the chip too high.

sagarverma · 23rd June 2006, 01:10 PM

i dont have any probs with soldering the SMT ,i can make adapters etc etc and all that, but what i fear is that the normal big bulky 100nf cap(as compared to SOIP very small opamp)
,,can it have a damaging effect on the IC,,like destruction due to static on the leads of cap,or other factors(the bypass cap is placed close to IC,so its worrying me)

Sagar

23rd June 2006, 12:19 PM	#1
sagarverma diyAudio Member Join Date: Feb 2005 Location: NEW DELHI	Can SOIC components be used with DIP? Hello I have SMT opamps which i would like to use. but i have only opamps in SMT packages and all other components like bypass caps,res. and other caps etc are all the classic thru hole. can i use the other components with the SMT ICs? Even the 100nf cap for supply bypass is bigger than the SMT IC. Sagar __________________ Never Underestimate The Bandwidth of A Station Wagon Full Of Magnetic Tapes Hurtling Down The Highway...................Andrew S Tanenbaum

23rd June 2006, 12:49 PM	#4
sagarverma diyAudio Member Join Date: Feb 2005 Location: NEW DELHI	what i exactly want to know is.....the opamp will need bypassing,since i dont have SOIP caps so can i use the regular caps for that? Sagar __________________ Never Underestimate The Bandwidth of A Station Wagon Full Of Magnetic Tapes Hurtling Down The Highway...................Andrew S Tanenbaum

23rd June 2006, 01:10 PM	#10
sagarverma diyAudio Member Join Date: Feb 2005 Location: NEW DELHI	i dont have any probs with soldering the SMT ,i can make adapters etc etc and all that, but what i fear is that the normal big bulky 100nf cap(as compared to SOIP very small opamp) ,,can it have a damaging effect on the IC,,like destruction due to static on the leads of cap,or other factors(the bypass cap is placed close to IC,so its worrying me) Sagar __________________ Never Underestimate The Bandwidth of A Station Wagon Full Of Magnetic Tapes Hurtling Down The Highway...................Andrew S Tanenbaum

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23rd June 2006, 12:34 PM	#2
cetoole diyAudio Member Join Date: Mar 2005 Location: Maryland, USA	Probably the easiest way is using Brown Dog adapters. I have used them a few times, and they are pretty good. You could also bend the leads out and solder them to a dip socket, or airwire it.

23rd June 2006, 12:42 PM	#3
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	you can also use copper foil -- the adhesive variety from 3M -- with a hobbyist knife cut the foil into a thin strip -- apply just as the doctor ordered. i use SMT ceramic caps in DIP designs for bypass caps -- just tack to the solder pad of the DUT, other end to the ground plane.

23rd June 2006, 12:55 PM	#5
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	100nF and 10nF ceramic bypass caps are on 100 mil lead spacing -- no reason that they can't be used -- here's a hint from Analog Devices -- the ground connection for the bypass cap should be as short as possible -- elsewise it's a radiator --

23rd June 2006, 01:02 PM	#7
Wynand diyAudio Member Join Date: Mar 2005 Location: Cape Town	You can mix them as you want/need to. Take the Mute resistor on the LM3886/876 chips as an example. Most use a 1206 size SMD resistor.

23rd June 2006, 01:05 PM	#8
Wynand diyAudio Member Join Date: Mar 2005 Location: Cape Town	The only problem I've found is that if you use for example a SMD opamp and push-through caps and you design your own PCB. The soldering of the caps is a problem, unless you have the options of having the PCB professionally made, or if you don't mind soldering the caps/opamp on the bottom side of the pcb

23rd June 2006, 01:07 PM	#9
Wynand diyAudio Member Join Date: Mar 2005 Location: Cape Town	On the topic, does anyone know how to make diy vias? It's easy to make pads on both sides of the pcb and joining them with a peice of wire, but my problem is having vias under, for example, an SMD opamp. The height of the solder will lift the chip too high.

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