Thank You TI

[Cmoyamphelp]

okay i got my samples 5 in total
1 opa637au
1 opa2107ap
1 opa134pa
1 opa627ap
1 opa2132pa

SO ya happy 35.90 of free stuff

what the best amp out of these for the cmoy

 

[bg4533]

I see lots of angry posts very soon.

So what do you plan on doing with single OPA134, OPA627 and OPA637s?

 

[ub312g0d]

that is a very odd set of parts considering you got 1 of each. last order I scooped up 3 627's, 3 637's and 3 tle2426's. All free and all good.

 

[Cmoyamphelp]

hey when your 16 and you don't realy what you can ask for and still get the free stuff,so im i guess you would call it testing the water

 

[bg4533]

Well, I personally don't care what you do with samples, but at least order things you can use.

The OPA637AU is a single channel soic chip. It needs a gain of 5 and will need a browndog to use in most amps here. You will need 2 OPA637s to use for a stereo amp. This can't be used for a Pimeta ground either.

The OPA627AP and OPA134pa are also single channel. Again, 2 to use for signal channels. I guess you could use the OPA134 as a ground buffer or something.

The OPA2107 and OPA2132 are all that is really useful to you right now.

 

[Garbz]

Funny I would call it abusing the system.

 

[av98m2]

Next time read the datasheets before choosing opamps, it'll help a lot. (at least you'll know whether opamps are single or dual channel, DIP or surface mount, suggested applications, that sort of thing)

 

[Cmoyamphelp]

okay im sorry i will use the otheres i will just order the others from the local TI distributer

I was also going by tangent's opa amp page,

 

[Edwood]

Is this his first time requesting those particular parts?

If so, how is that abuse?

He's trying them out.

If he likes them, he can buy them from a distributer like Digikey (who incidentally ships TI's samples).

Samples are very much like samples at a grocery store. Have a taste. Like it? Buy some more. Now if you keep going back and eat all the samples, then that would be abuse.

Unless I missed something, samples are not only meant for big corporations with an engineering staff. If that were so, they wouldn't have bothered shipping anything to small fry like us.

-Ed

 

[n_maher]

Quote:

Originally Posted by Edwood Is this his first time requesting those particular parts? If so, how is that abuse? -Ed

I'm not really trying to stir up poop here Ed, you're obviously a well respected member of these forums, but your response is based on the assumption that he was honest in his request for the samples. Now in an effort to find out a little bit more about TI's sample program I went to their site and filled out the necessary forms. I do not see how a 16 year old could do this without lying or at least misleading the folks at TI. What "occupation" did he use, other perhaps? What "company" does he work for that is some how related to the use of their chips?

Do I think that he necessarily abused the system, no not really, but the basic idea as I see it is for the samples to be used in products that are in development or to modify a product that is already in production. The sample program is certainly not setup to provide the audio DIY'er with free parts, do you think? Now I freely admit that when I first got started with this stuff a couple of months ago I thought about getting some free samples and I'm glad I didn't. Most of these amps and such that we build are incredibly cheap for what we're getting. Now that I'm actually building amps and selling them (for little profit) I may take TI and AD up on their respective samples, but it'll be to develop a better amp, not to make one for myself. But to be honest, with the limited production that I plan (no more than 12 amps a year) I'd feel a little guilty about.

That's my 0.02.

Nate

 

[tangent]

Quote:

Samples are very much like samples at a grocery store. Have a taste. Like it? Buy some more

The analogy is weak. A grocery store sample doesn't satiate you. You end up buying a box of the stuff that day if you want more, and the profit from that pays for the samples. The program isn't a big risk.

A single samples order from TI can populate all required active parts on a PIMETA, which is enough to "satiate" most people. For your analogy to hold, most DIYers would have to have the deep sickness that those of us with more amps than headphones and sources combined have.

Quote:

they wouldn't have bothered shipping anything to small fry like us.

They ship to small fry because it's more effort than it's worth to try and verify the end use of the parts. It costs money to man phones, and it's not a very good filter anyway.

That doesn't mean they want to send these parts out to Joe DIYer. If that's what they wanted, they'd be taking out ads in magazines like Scientific American. But instead, they advertise in controlled-circulation magazines like Electronic Design. Its readers are who they want to have the samples, in an ideal world.

 

[Edwood]

I'm certainly not satiated.

I've been buying parts left and right.

-Ed

 

[aos]

Actually, if you look around modern grocery stores, especially in the bulk foods area, you'll find a notice that tells you that sampling is not allowed. Then they proceed to tell you that if you want to try, you are welcome to buy as little as you want (and hence pay only a little).

Actually, TI does man the phones. I've received phone calls several times from TI asking me what I will do with their chips. Perhaps that's because I tend to sample chips fresh off the presses like SRC4192 or PCM1791A which are of basically no use to most hobbyists.

 

[Edwood]

Quote:

Originally Posted by tangent A single samples order from TI can populate all required active parts on a PIMETA, which is enough to "satiate" most people. For your analogy to hold, most DIYers would have to have the deep sickness that those of us with more amps than headphones and sources combined have.

I'm very sick.

Quote:

Originally Posted by tangent That doesn't mean they want to send these parts out to Joe DIYer. If that's what they wanted, they'd be taking out ads in magazines like Scientific American. But instead, they advertise in controlled-circulation magazines like Electronic Design. Its readers are who they want to have the samples, in an ideal world.

That doesn't mean that they don't want to send these parts out to Joe DIYer.
They are trying to get publicity and exposure for their products. One Joe DIYer could end up starting a company, or working for one, in which just maybe they may have a use for previously used samples. Guess who they are going to remember?

-Ed

 

[tangent]

Quote:

I'm very sick

As am I, but these few exceptions don't justify the practice.

Quote:

One Joe DIYer could end up starting a company, or working for one, in which just maybe they may have a use for previously used samples. Guess who they are going to remember?

That's backwards. While Joe is a DIYer, he should buy his parts. If he starts or joins a company producing things that use these sort of parts, he can then morally justify getting samples.

I consider myself in a gray area. I only sample parts when I'm prototyping something where specific parts need to be evaluated. When prototyping, say, PPAv2, I did not sample any parts, because I already knew the sort of parts that would work. In something brand new, where I'm not even sure what parts work, I will sample parts. And even then, I'll only do it when making boards for sale to others. If it's a personal project, I'll buy my own parts, even if I'm not sure they'll work.

For me, it all comes down a very simple razor: is there a reasonable chance that the company providing me samples will quickly make up the cost of sending me the samples?