SLOS018I May   1988  – July 2016 LT1013 , LT1013AM , LT1013D , LT1013M

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics: LT1013C, ±15 V
    6. 6.6  Electrical Characteristics: LT1013C, 5 V
    7. 6.7  Electrical Characteristics: LT1013D, ±15 V
    8. 6.8  Electrical Characteristics: LT1013D, 5 V
    9. 6.9  Electrical Characteristics: LT1013DI, ±15 V
    10. 6.10 Electrical Characteristics: LT1013DI, 5 V
    11. 6.11 Electrical Characteristics: LT1013M, ±15 V
    12. 6.12 Electrical Characteristics: LT1013M, 5 V
    13. 6.13 Electrical Characteristics: LT1013AM, ±15 V
    14. 6.14 Electrical Characteristics: LT1013AM, 5 V
    15. 6.15 Electrical Characteristics: LT1013DM, ±15 V
    16. 6.16 Electrical Characteristics: LT1013DM, 5 V
    17. 6.17 Operating Characteristics
    18. 6.18 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Input Resistors
      2. 7.3.2 Output Stage
      3. 7.3.3 Low-Supply Operation
      4. 7.3.4 Output Phase Reversal Protection
        1. 7.3.4.1 Comparator Applications
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Developmental Support
    2. 11.2 Related Links
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

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8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

8.1 Application Information

The LT1013x operational amplifiers are useful in a wide range of signal conditioning applications where high DC accuracy is needed.

8.2 Typical Application

A typical application for an operational amplifier in an inverting amplifier. This amplifier takes a positive voltage on the input and makes it a negative voltage of the same magnitude. In the same manner, it also makes negative voltages positive.

LT1013 LT1013D LT1013M LT1013AM app_sch.gif Figure 27. Application Schematic

8.2.1 Design Requirements

The supply voltage must be chosen such that it is larger than the input voltage range and output range. For instance, this application scales a signal of ±0.5 V to ±1.8 V. Setting the supply at ±12 V is sufficient to accommodate this application.

8.2.2 Detailed Design Procedure

Determine the gain required by the inverting amplifier using Equation 1 and Equation 2:

Equation 1. LT1013 LT1013D LT1013M LT1013AM app_eq1.gif
Equation 2. LT1013 LT1013D LT1013M LT1013AM app_eq2.gif

Once the desired gain is determined, choose a value for RI or RF. Choosing a value in the kΩ range is desirable because the amplifier circuit will use currents in the milliamp range. This ensures the part does not draw too much current. This example chooses 10 kΩ for RI, which means 36 kΩ is used for RF. This was determined by Equation 3.

Equation 3. LT1013 LT1013D LT1013M LT1013AM app_eq3.gif

8.2.3 Application Curve

LT1013 LT1013D LT1013M LT1013AM app_graph.gif Figure 28. Input and Output Voltages of the Inverting Amplifier