SBOS516G September   2010  – May 2020 OPA171 , OPA2171 , OPA4171

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Offset Voltage vs Common-Mode Voltage
      2.      Offset Voltage vs Power Supply
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions: OPA171
    2.     Pin Functions: OPA2171
    3.     Pin Functions: OPA4171
  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: OPA171
    5. 6.5 Thermal Information: OPA2171
    6. 6.6 Thermal Information: OPA4171
    7. 6.7 Electrical Characteristics
    8. 6.8 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 Operating Characteristics
      2. 7.3.2 Common-Mode Voltage Range
      3. 7.3.3 Phase-Reversal Protection
      4. 7.3.4 Capacitive Load and Stability
    4. 7.4 Device Functional Modes
      1. 7.4.1 Common-Mode Voltage Range
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Electrical Overstress
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Capacitive Load and Stability
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Related Links
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

8.2.2.1 Capacitive Load and Stability

The dynamic characteristics of the OPAx171 are optimized for commonly encountered operating conditions. The combination of low closed-loop gain and high capacitive loads decreases the phase margin of the amplifier and can lead to gain peaking or oscillations. As a result, heavier capacitive loads must be isolated from the output. The simplest way to achieve this isolation is to add a small resistor (for example, ROUT equal to 50 Ω) in series with the output. Figure 38 and Figure 39 illustrate graphs of small-signal overshoot versus capacitive load for several values of ROUT. See Applications Bulletin AB-028, available for download from the TI website for details of analysis techniques and application circuits.

OPA171 OPA2171 OPA4171 tc_sm_oshoot-cl_pos_bos516.gifFigure 43. Small-Signal Overshoot vs Capacitive Load (100-mV Output Step)
OPA171 OPA2171 OPA4171 tc_sm_oshoot-cl_neg_bos516.gifFigure 44. Small-Signal Overshoot vs Capacitive Load (100-mV Output Step)