AnsweredAssumed Answered

How to select an Operational Amplifier?

Question asked by Boimond.Anthony Employee on Nov 18, 2011
Latest reply on Nov 29, 2011 by Boimond.Anthony

Dear Forum Members,

I’d like to share a few tips on the usual process I use to select an Op Amp based on pre-defined technical requirement.

The tool I use more often is the product selector, which can be accessed by clicking on the following icon from ST home page:
Clipboard01.bmp
Then select in the product tree: “Amplifiers and Comparators” > “Amplifiers”.

Here is also direct link to the product selector:
http://www.st.com/stonline/stappl/productcatalog/app?page=productSelector

The next step is then to use the “Filter Panel” in order to refine the technical requirements.
 Clipboard02.jpg

Tip1: use the arrows Clipboard03.bmp  to see all the filtering parameters.

Tip2: use the Clipboard04.bmp  icon close to the parameter name to toggle the filter type between “tick case” and “slider”.

In my typical Op Amp selection, I would firstly apply filter on the more obvious (and restrictive) parameters, like voltage rating “Vcc”, “number of channel” or “automotive grade”.
Then once the selection is narrowed to a limited number of components, I would use the sorting option, by clicking on the parameter. A red arrow indicated if the list is sorted by ascending or descending order.
For instance sorting by maximum supply current: Clipboard05.bmp
In this case, the sorting option helps to address the Icc / GBW trade off.

Don’t hesitate to let us know your comments about the product selector and if there are additional features you would like to see implemented.

Best regards.

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