OPA992 datasheet(26/50 Pages) TI

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This chart can be used to calculate approximate probability of a specification in a unit; for example, for

OPAx992-Q1, the typical input voltage offset is 210 µV. So 68.2% of all OPAx992-Q1 devices are expected

to have an offset from –210 µV to +210 µV. At 4 σ (±840 µV), 99.9937% of the distribution has an offset voltage

less than ±840 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 specified by TI, and units outside these

limits are removed from production material. For example, the OPAx992-Q1 family has a maximum offset

voltage of 1 mV at 25°C, and even though this corresponds to slightly less than 5 σ (

≅1 in 1.7 million units),

which is extremely unlikely, TI maintains that any unit with larger offset than 1 mV is removed from production

material.

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

sufficient guardband for the 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 can be an option as

a wide guardband to design a system around. In this case, the OPAx992-Q1 family does not have a maximum

or minimum for offset voltage drift. But based on the typical value of 0.25 µV/°C in the Section 6.7 table, the

6-σ value for offset voltage drift is about 1.5 µV/°C when calculated. 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.

Note that 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 verify the performance of a

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

7.4 Device Functional Modes

The OPAx992-Q1 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-Q1 is 40 V (±20 V).

OPA992-Q1, OPA2992-Q1, OPA4992-Q1

SBOSAC9D – AUGUST 2022 – REVISED APRIL 2023

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Product Folder Links: OPA992-Q1 OPA2992-Q1 OPA4992-Q1

OPA992 Datasheet(PDF) 26 Page - Texas Instruments