AnsweredAssumed Answered

Offset voltage on dual amp.

Question asked by Tarzan on Jun 21, 2011
Latest reply on Jun 24, 2011 by Tarzan

Hi, everyone.

I'd like to have advice about the offset voltage on plural amps.
I made a test circuit and observed the offset voltage on each amp of ADP8602(Agrade), Dual Precision CMOS, Single-Supply, Rail-to-Rail amp.
But the outcome was different from what I expected before doing it.

Both of the offset voltage were below the max value on the electric specification of the datasheet.
But there is a big gap between channle 1 and 2 as below.
・Offset voltage of channel 1 is 5uV
・Offset voltage of channel 2 is 193uV

Is it common that pularl amps in a package has a gap on the offset voltage like that?

 

offset.bmp

Outcomes