How is accuracy specified?

[John Smith]

"Spehro Pefhany" <speffSNIP@interlogDOTyou.knowwhat> wrote in message
newss9fp0t7e3228n594r9s0shvkb32f8j9f7@4ax.com...

On Sun, 14 Nov 2004 17:55:01 GMT, the renowned legg
legg@nospam.magma.ca> wrote:

On Sat, 13 Nov 2004 18:15:49 -0600, "John Smith"
kd5yikes@mindspring.com> wrote:



Is there any trouble ( question for John Smith ) improving the
linearity /
offset
?


No. I know how to improve it (technically). If I didn't, I could look in
AoE. The purpose of the question was to learn whether my knowledge of
accuracy (measurements) was screwed up or not. I now know (from the posts
in
this group) that there are several different definitions of accuracy, and
the definition of interest depends on agreements and circumstances. A
redesign of the circuit and board will allow it to meet their specs.

Is there no method of trimming manually? For 100 pieces, it might pay.

RL

If you trim zero and span you'd have to try pretty hard (oscillation?
discrete parts?) to make it worse than so-called "0.1% accuracy" under
"reference conditions", even with carbon film resistors, an LM741 and
a zener reference.


Best regards,
Spehro Pefhany

That's true. No sense in doing this unless I do it right.

Thanks for your opinions.

John