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Topic: Converting a signals voltage range (Read 4402 times) previous topic - next topic

contecavour

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

i see only 31 pages.
have you a link of yours datasheet?
N

contecavour


contecavour

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

N

contecavour

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...

N




Constantin


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.

contecavour

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

N

wanderson


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

N


The LM358 does not support rail to rail voltage swings.  The LMV358 does...
New true random number library available at: http://code.google.com/p/avr-hardware-random-number-generation/

Current version 1.0.1

contecavour

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

N

wanderson

#38
Aug 02, 2012, 04:33 pm Last Edit: Aug 02, 2012, 05:17 pm by wanderson Reason: 1

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.
New true random number library available at: http://code.google.com/p/avr-hardware-random-number-generation/

Current version 1.0.1

contecavour

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

N

wanderson


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

N


Sorry, I meant OpAmp.  But I did already give you a list of options...
New true random number library available at: http://code.google.com/p/avr-hardware-random-number-generation/

Current version 1.0.1

contecavour

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

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