Why do voltage references have values like 2.495V or 2.048V?

bigbat

Why do voltage references have values like 2.495V or 2.048V? [Copy link]

A few days ago, when I was looking for voltage reference source chips, I found that the voltage reference has values such as 2.495V or 2.048V, and there are also reference chips such as 2.5V. But I didn't find a chip with 2.500V. Does a chip with a nominal 2.5V mean 2.495V, or is there any special use for the value 2.495? Please answer this question, experts.

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littleshrimp

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yipyou

In fact, it is impossible for the designed and manufactured products to have absolutely uniform product data. The only data can be the actual value of the product's online testing before it leaves the factory. It depends on what aspects you choose to apply it to.

bigbat

yipyou posted on 2020-4-24 10:56 In fact, it is impossible for the designed and manufactured products to have absolutely uniform and identical product data. The only data can be the actual value of the product's online test before it leaves the factory. It depends on you...

This is the same as saying nothing! There are definitely slight differences in the products, which is a matter of manufacturing accuracy or error, but it is not a matter of product nominal accuracy. This kind of chip factory does not need to calibrate every product before it leaves the factory.