Hello,
INA2133 from TI has an offset voltage of 450uV. Its a 14 pin Chip. I am looking for its pin compatible lower offset voltage chip. Ideally, I need something lower than 15uV offset voltage.
You can find INA 2133 data sheet at the following link
I will really appreciate any help!
Thanks John
Redesign to tolerate higher offset voltage.
20 uV per degree Celsius is a typical thermocouple voltage, and ALL the wiring, including on-chip wiring, is made of dissimilar metals. Unless there's a stirred liquid bath, your circuit won't have 15 uV accuracy regardless of the amplifier spec.The amplifier manufacturers don't have time to test their chips in a stirred liquid bath, either.
Commutating auto-zero amplifiers can offer very nice inside-the-amplifier DC errors, but they have other issues.
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