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LMH6559: Right value for noise calculation

Miriam Mesek
Intellectual 1095 points
Part Number: LMH6559

Hi all,

I’m trying to make sense of the noise specifications in the datasheet for the LMH6559. In the table on page 3, the noise for +/-5V power supplies is reported as 5.7nv/rtHz@1MHz. But, in Figure 17 on page 11, it is much lower than that, more like 2.5 nV/rtHz@1MHz. What’s the right value to calculate with, the one in the table or the one in the figure?

Thanks and best,

Miri