–200 µV to +200 µV. At 4 σ (±800 µV), 99.9937% of the distribution has an offset voltage less than ±800 µV,

which means 0.0063% of the population is outside of these limits, which corresponds to about 1 in 15,873 units.

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

will be removed from production material. For example, the OPAx992 family has a maximum offset voltage of

1 mV at 25°C, and even though this corresponds to 5 σ (≈1 in 1.7 million units), which is extremely unlikely, TI

assures that any unit with larger offset than 1 mV will be removed from production material.

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

sufficient guardband for your application, and design worst-case conditions using this value. For example, the

6-σ value corresponds to about 1 in 500 million units, which is an extremely unlikely chance, and could be

an option as a wide guardband to design a system around. In this case, the OPAx992 family does not have

a maximum or minimum for offset voltage drift. But based on the typical value of 0.5 µV/°C in the Electrical

Characteristics table, it can be calculated that the 6-σ value for offset voltage drift is about 3 µV/°C. When

designing for worst-case system conditions, this value can be used to estimate the worst possible offset across

temperature without having an actual minimum or maximum value.

However, process variation and adjustments over time can shift typical means and standard deviations, and

unless there is a value in the minimum or maximum specification column, TI cannot assure the performance of a

device. This information should be used only to estimate the performance of a device.

7.4 Device Functional Modes

The OPAx992 has a single functional mode and is operational when the power-supply voltage is greater than or

equal to 2.7 V (±1.35 V). The maximum power supply voltage for the OPAx992 is 40 V (±20 V).

The OPAx992S devices feature a shutdown pin, which can be used to place the op amp into a low-power mode.

OPA992, OPA2992, OPA4992

SBOSA10 – JUNE 2021

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