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发表于 2021-6-26 02:29:00
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(1) The LSB of trim is dertermined by the spec. For example, if the spec ask 1mV offset, LSB of trim is btter to be smaller than it.
(2) The trim range is determined by "delta" or "sigma". When you run montecarlo, you will get meam, and detla. In general, big company asks to cover "5 sigma" ( which will induce CPK 1.6~1.5". So the trim ranage must be able to cover the "+/- 5 sigma" error.
From (1), you have LSB. From (2), you have total range. Now you have bit number.
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