SBOSA11A March   2020  – March 2021 OPA2206


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information: OPA2206
    5. 6.5 Electrical Characteristics: VS = ±5 V
    6. 6.6 Electrical Characteristics: VS = ±15 V
    7. 6.7 Typical Characteristics
  7. Parameter Measurement Information
    1. 7.1 Typical Specifications and Distributions
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Input Overvoltage Protection
      2. 8.3.2 Input Offset Trimming
      3. 8.3.3 Lower Input Bias With Super-Beta Inputs
      4. 8.3.4 Overload Power Limiter
      5. 8.3.5 EMI Rejection
    4. 8.4 Device Functional Modes
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Voltage Attenuator
        1. Design Requirements
        2. Detailed Design Procedure
        3. Application Curves
      2. 9.2.2 Discrete, Two-Op-Amp Instrumentation Amplifier
      3. 9.2.3 Input Buffer and Protection for ADC Driver
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Typical Specifications and Distributions

Designers often have questions about a typical specification of an amplifier in order to design a more robust circuit. As a result of natural variations in process technology and manufacturing procedures, every specification of an amplifier exhibits some amount of deviation from the ideal value, such as the input bias current of an amplifier. These deviations often follow Gaussian (bell curve), or normal distributions. Circuit designers can leverage this information to guardband their system, even when there is no minimum or maximum specification in the Electrical Characteristics.

GUID-67C0DD7A-7206-4D09-B3B2-BC381262906C-low.gif Figure 7-1 Ideal Gaussian Distribution

Figure 7-1 shows an example distribution, where µ, is the mean of the distribution, and where σ, or sigma, is the standard deviation of a system. For a specification that exhibits this kind of distribution, approximately two-thirds (68.26%) of all units can be expected to have a value within one standard deviation, or one sigma, of the mean (from µ–σ to µ+σ).

Depending on the specification, values listed in the typical column of Electrical Characteristics are represented in different ways. As a general guideline, if a specification naturally has a nonzero mean (for example, gain bandwidth), then the typical value is equal to the mean (µ). However, if a specification naturally has a mean near zero (for example, input bias current), then the typical value is equal to 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 OPA2206 typical input bias current is ±0.1 nA; therefore, 68.2% of all devices are expected to have an input bias from ±0.1 nA. At 4σ, 99.9937% of the distribution has an input bias less than ±0.28 nA, which means that 0.0063% of the population is outside of these limits, and corresponds to approximately 1 in 15,873 units.

Units that are found to exceed any tested minimum or maximum specifications are removed from production material. For example, the OPA2206 has a maximum input bias of ±0.4 nA at 25°C, and although this value corresponds to approximately 6σ (~1 in 500 million units), TI removes any unit with a larger input bias 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. This information should only be used to estimate the performance of a device.