1

1

1

1

1

1

1

1

1

0.00002%

1

1

1

0.00002%

-1

-21

-31

-41

-51

-61

+1

+21

+31

+41

+51

+61

34.13% 13.59%

34.13%

13.59%

2.145%

2.145% 0.13185%

0.13185%

0.00312%

0.00312%

Figure 7-4. Ideal Gaussian Distribution

Depending on the specification, values listed in the typical column of the Electrical Characteristics table are

represented in different ways. Generally, if a specification naturally has a nonzero mean (for example, gain

bandwidth), then the typical value is equal to the mean (µ). Some specifications (such as offset voltage) have

a mean near zero. In this case, the typical value equals the mean plus one standard deviation (µ + σ) to most

accurately represent the typical value.

Use this chart to calculate the approximate probability of a specification in a unit. For example, the INA600A

typical offset voltage is 1100µV. Thus, 68.2% of all INA600A devices are expected to have an offset from

–1100µV to +1100µV. At 4σ (±4400µV), 99.9937% of the distribution has an offset voltage less than ±4400µV.

Therefore, 0.0063% of the population is outside of these limits, which corresponds to approximately 1 in 15,873

units.

Specifications with a value in the minimum or maximum column are verified by TI, and units outside these limits

are removed from production material. For example, the INA600A family has a maximum gain error of ±0.05%

at 25°C. Even though this error corresponds to 5σ, TI verifies that any units with gain error larger than ±0.05%

are removed from production material. This error equals approximately 1 in 3.5 million units, which is extremely

unlikely.

For specifications with no value in the minimum or maximum column, consider selecting a sigma value of

sufficient guard band for the application. Design worst-case conditions using this value. A 6σ value corresponds

to approximately 1 in 500 million units, which is extremely unlikely. This 6σ value is an option as a wide guard

band for designing a system around. Histograms for some of the important specifications (such as offset, offset

drift, CMRR, and gain error) are shown in the Typical Characteristics section.

For gain error drift, the INA600 family does not specify a maximum value based on final test. Instead, this value

is based on characterization, as mentioned in the Electrical Characteristics table. The corresponding distribution

mentioned in Figure 6-4 has a mean of –0.00216% and sigma of 0.0047%. Thus, the mean plus 6σ value for

gain error is calculated to be approximately 0.025%. When designing for system conditions with 6σ guard band,

use this method and value to estimate the worst possible gain error. However, process variation and adjustments

over time potentially shift typical means and standard deviations. Unless there is a value in the minimum or

maximum specification column that is specified based on final test, TI cannot verify device performance.

www.ti.com

INA600

SBOSAM3A – JULY 2025 – REVISED AUGUST 2025

Copyright © 2025 Texas Instruments Incorporated

Submit Document Feedback

23

Product Folder Links: INA600