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Subject: Re: opamp offset compensation?

Date: 12/07/00 at 6:01 AM
Posted by: John Dunn - Consultant
E-mail: ambertec@ieee.org
Message Posted:

In Reply to: opamp offset compensation? posted by I.T. on 12/07/00 at 2:42 AM:

The 741 op-amp has two pins devoted to offset null, pin 1 and pin 5. There is a sketch near the end of a posting at http://www.ibiblio.org/kuphaldt/Semi/opamp.htm which shows an offset nulling 10K potentiometer connected between pins 1 and 5 with the slider connected to the negative rail. You adjust the potentiomter for minimum offset.

A question however: The 741 is a thirty-two year old product and better devices are available, especially regarding input offset bias currents which can cause difficulty. Have you considered a different device choice?

Good luck.

John Dunn - President
Ambertec, Inc.
ambertec@ieee.org


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