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[Reply #30 on:]

http://www.wvshare.com/datasheet/AD_PDF/AD7715.PDF

i see only 31 pages.
have you a link of yours datasheet?
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[Reply #31 on:]

Could be page 27 of mine pdf?

[Reply #32 on:]

May be this?
http://www.analog.com/static/imported-files/data_sheets/AD7715.pdf

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[Reply #33 on:]

Restart from here.

One rail to rail that should work is the TI LMV358 (dual) or the TI LMV358 (quad).  Personally I would go with the quad and have three stages each with an amplification of 10... (using the values mentioned above).
In general the higher the amplification one attempts in a single stage, the more likely problems will be encountered--about a 100 amplification per stage is a good max for rule of thumb

I'll lookin for LMV358 or LMV358 or analog...

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[Reply #34 on:]

May be this?
http://www.analog.com/static/imported-files/data_sheets/AD7715.pdf

Yes. The PDIP version of the AD7715 can be installed in a breadboard, you can make the necessary connections before coming up with a PCB, corrections, etc. But my recommendation is that you first learn how to amplify the signal, then use a pre-mounted ADC like the one I linked to. Less risk than jumping into the deep end from the beginning, trying to set up a sophisticated ADC. Just my opinion.

[Reply #35 on:]

I'll use LM358 on breadboard.
What do you think?

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[Reply #36 on:]

I'll use LM358 on breadboard.
What do you think?

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The LM358 does not support rail to rail voltage swings.  The LMV358 does...

[Reply #37 on:]

But it's only SMD .
io must use a Breadboard.

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[Reply #38 on:]

But it's only SMD .
io must use a Breadboard.

N

The you will need to find an opamp that is rail to rail, can operate from a single 5V supply, and comes in a DIP package.  I believe I gave you a list of devices a few pages back, but if none of those suit your needs then Digikey has a very good parametrized parts search function.

[Reply #39 on:]

no, none A2D.
I want to try with opAmp.

Then opAmp, DIP package 5V supply are mandatory.
rail to rail  if it's possible

I try with Digikey

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[Reply #40 on:]

no, none A2D.
I want to try with opAmp.

Then opAmp, DIP package 5V supply are mandatory.
rail to rail  if it's possible

I try with Digikey

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Sorry, I meant OpAmp.  But I did already give you a list of options...

[Reply #41 on:]

Ok, i check the list, i hope to find all the options possible