Hello I recently got an ADC0800LCN-DIP16. I couldn’t find the Datasheet for this specific chip. I only found Datasheets for ADC0800-DIP18. So how can i know which pin in what on my chip without Datasheet?

 

http://www.ti.com/lit/ds/symlink/dac0800.pdf

 

http://www.ti.com/lit/ds/symlink/dac0800.pdf

This is for DAC0800. I’m looking for ADC0800LCN

 

This is for DAC0800. I’m looking for ADC0800LCN

Well, that is interesting because the original National part was always an 18 pin dip as far as I can see. The later TI part, is the ONLY 16 pin DIP that I can find. If you look at the Addendum-Page 1 in the document that I linked to, you will see the LCN package as an option and I believe that the pin out would be the same for all of the 16 pin 0800 devices. But, I could be wrong.

Maybe @bertus or someone else can offer another opinion.

Why do you think it is not the correct pin out (the linked datasheet) and have you contacted the folks that you purchased it from for a datasheet?

LOL, you mean they are different? Sorry, a mind is a terrible thing to waste

 

https://cdn.datasheetspdf.com/pdf-down/A/D/C/ADC0800_NationalSemiconductor.pdf
That is a very old part.
Good luck!

 

https://cdn.datasheetspdf.com/pdf-down/A/D/C/ADC0800_NationalSemiconductor.pdf
That is a very old part.
Good luck!

That is the 18 pin NS legitimate legacy part - the OP wants the data sheet for the 16 pin version ADC0800LCN

It is bugging me (probably because of that earlier dac mistake) but the part does exist as some kind of afterthought/knockoff/new NS
see https://zh.utsource.net/itm/p/8365522.html

But their datasheet link is a file not found.

Gee, I never saw a national semiconductor logo like that

 

@Attishaki I know that you have been looking diligently as I see your inquiry here:

All I can think of is that you visit and write each of the possible suppliers and request one. I like puzzles, but I can't find a datasheet for this obscure part.

Some vendors are listed here:
https://www.digipart.com/part/adc0800lcn
https://www.digchip.com/datasheets/quote.php?action=search&pn=ADC0800LCN

This may be your best bet, but there link to the datasheet is fictitious.
https://www.jotrin.com/product/parts/ADC0800LCN

Please do come back and let us know where you found the datasheet (if you do).

 

Given the lack of info found by the ever-diligent @Raymond Genovese and a less-so myself, I'd scrap that thing and just buy an up to date part (this 18 pin one is PMOS). It would perform better, use fewer power supplies and you'd have a better chance of getting help with any problems you have.

Just my .02

 

Hello,

All databooks I got from National only mention the 18 pins ADC0800.
I also can not find any info on the 16 pins.

Bertus

 

Just to follow up, I did write a company and asked for the datasheet. The only way they had to contact them was through an online form to request a quote. So, I did that and I put the datasheet request in the comments. I received a quote in a timely and professional manner, but no datasheet. I wrote back and repeated the request. Again, receiving a timely and professional response that included...

I am sorry that we can not provide the PDF datasheet of ADC0800LCN, but we confirm we supply you the original.

My conclusion is that they simply do not have a datasheet - so proprietary that apparently nobody does. Don't know how that could be, but if there was a large surplus resulting from some dedicated special order or something, I suppose it could happen.

So, without so much as a pin out, let alone specs, how could you possibly use it for anything other than making those little sculptures? Why not get adventurous and GUESS the pinout?

After looking at the original NS 18 pin part (@JohnInTX linked the datasheet in post #5), I thought...hmmm...what two pins could be removed and still have a functional chip (that is, function like the original NS part). In my view, the resistor network top and bottom pins (5 & 15) would be the best candidates. Even if, by some chance, I am right, that doesn't mean that everything else gets slid down a pin, but it could.

Yes, I know this is ridiculous - just use a chip that has a datasheet - but it could be fun to kind of reverse engineer something that has almost no value. It is the kind of stupid thing I would do.

So, @Attishaki can you tell us how it is that you came to have this chip and have you found the datasheet?

 

Just to follow up, I did write a company and asked for the datasheet. The only way they had to contact them was through an online form to request a quote. So, I did that and I put the datasheet request in the comments. I received a quote in a timely and professional manner, but no datasheet. I wrote back and repeated the request. Again, receiving a timely and professional response that included...

I am sorry that we can not provide the PDF datasheet of ADC0800LCN, but we confirm we supply you the original.

My conclusion is that they simply do not have a datasheet - so proprietary that apparently nobody does. Don't know how that could be, but if there was a large surplus resulting from some dedicated special order or something, I suppose it could happen.

So, without so much as a pin out, let alone specs, how could you possibly use it for anything other than making those little sculptures? Why not get adventurous and GUESS the pinout?

After looking at the original NS 18 pin part (@JohnInTX linked the datasheet in post #5), I thought...hmmm...what two pins could be removed and still have a functional chip (that is, function like the original NS part). In my view, the resistor network top and bottom pins (5 & 15) would be the best candidates. Even if, by some chance, I am right, that doesn't mean that everything else gets slid down a pin, but it could.

Yes, I know this is ridiculous - just use a chip that has a datasheet - but it could be fun to kind of reverse engineer something that has almost no value. It is the kind of stupid thing I would do.

So, @Attishaki can you tell us how it is that you came to have this chip and have you found the datasheet?

Yeah. I emailed them as well and i got the same response. I’m just baffled that you can order a supply of the chip but can’t get the information to use it. I got this chip thinking that is the same one from the Datasheet (DIP18). So i guess that I’ll be finding another 8 bit ADC to put in my project. It would be great of you could recommend another chip with similar characteristics to the original one.

 

I have used AD7574 in the past.

 

I would go with @MrChips recommendation or someone else as experienced. All of the ADCs that I have used in recent memory are with controller boards that have them embedded. I would have to go back to the days when Maxim would send you free samples and you could just circle the numbers on a card.

 

I am pretty sure I have that datasheet, but am remote until Friday.

If by then you still do not have it I will look for it.


Regards, Dana.

 

Here, 18 pin part in this book, download it as PDF.

https://ia800602.us.archive.org/35/...ionBook1978/NatSemiDataAquisitionBook1978.pdf

Are you using the A/D with a processor ? If so there are UP parts out there
with mux and Vref and 12 bit SAR and/or 20 bit DelSig......


Regards, Dana.

 

Here, 18 pin part in this book, download it as PDF.

https://ia800602.us.archive.org/35/...ionBook1978/NatSemiDataAquisitionBook1978.pdf

Are you using the A/D with a processor ? If so there are UP parts out there
with mux and Vref and 12 bit SAR and/or 20 bit DelSig......


Regards, Dana.

So, the 18 pin part datasheet was posted back in #5. This was some kind of custom/hybrid/??? that is currently available for purchase, but without a datasheet. I speculated on which 2 pins were eliminated but there is no way of knowing.