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(AD8418)Which is faster device between AD8418 and AD8418A?

Question asked by donadona999s on Oct 20, 2015
Latest reply on Nov 5, 2015 by donadona999s

Hi !

 

I want to know which Tr/Tf is faster between AD8418 & AD8418A?

 

(1)===================================================================

At Figure.11 , it look like AD8418A is faster.

TR_TF.JPG

 

But at Figure.15 & 17 , it look like AD8418 is faste.

TR_TF.JPG

 

Would you explain about this?

AD8418A is faster at small input signal, AD8418 is faster at large input signal?

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(2)===================================================================

And also I want to know which is better device for common-mode signal.

I saw the discussion attached below.

https://ez.analog.com/message/141493#141493

And also at datasheet , it look AD8418A is better.

COMMON.JPG

But at application note look like AD8418 is better.

COMMON.JPG

 

So, which is good to choice?

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Can you give me an advise with explaining with how to chose AD8418 or AD8418A ?

 

Best regards.

Kawa

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