What is the difference between 0.1% and 1% metal film resistors ? Are the higher precision parts made from a different process ? Or cherry picked from a big batch of 1% ? Just curious.
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Different process looking at some here. They are physically different in construction and finish.
We use 1% or 2% MFR generally, having ditched CFR a few years back. We have a few stock 1% for special needs.
Peter
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I think most are laser etch trimmed to .1%.
Different process, at least in most cases. Compare tempco, load life and other stability figures to see. A 1% resistor that happens to be within 0.1% will usually not have the stability that many designers are looking for.
Best regards, Spehro Pefhany
Thanks everyone that was informative. I had noticed the lower tempcos but not the other parameters.
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