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# INA240-Q1: INA240A1-Q1

Part Number: INA240-Q1

Hello Team,

I am using INA240A1-Q1 (Gain=20) CSA amplifier in my project.

For calculating output voltage of INA240A1.

What error rate i need to consider for GAIN??

a). Gain error -> 0.05% (max -> 0.2%) ===> For this option, in datasheet they given temperature vs Gain error graph

b). Gain error --> 0.5 ppm/c (max -> 2.5ppm/C)

In the above two option which one i need to consider for calculating CSA output voltage

• Hello,

This depends in what temperature condition you are using the amplifier. If you are using the amplifier at 25C then the typ and max from point a will be best (this is called out at the top of the table under the header 7.5). If you are using the amplifier in a different ambient temperature you will need to find the delta between your ambient temp and 25C and add the temp coefficient factor to the error.

Keep in mind this is only for gain error without non-linearity.

For example:

Gain error at 50C typ = .05%+.5ppm*(50-25)

There is a TIPL video on gain error and a video series that explains the error calculation in more depth found here:

https://training.ti.com/error-sources?context=1139747-1139745-1138708-1139852

Regards,

Cas