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Replacement part needed

J

john

Jan 1, 1970
0
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
http://focus.ti.com/lit/ds/symlink/ina2133.pdf


I will really appreciate any help!


Thanks
John
 
W

whit3rd

Jan 1, 1970
0
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.

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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