SLOS196B October   1987  – June 2025 TLV2711

PRODUCTION DATA  

  1.   1
  2. 1Features
  3. 2Description
  4. 3Pin Configuration and Functions
  5. 4Specifications
    1. 4.1 Absolute Maximum Ratings
    2. 4.2 Dissipation Rating Table
    3. 4.3 Recommended Operating Conditions
    4. 4.4 Electrical Characteristics, VDD = 3 V
    5. 4.5 Operating Characteristics, VDD = 3 V
    6. 4.6 Electrical Characteristics, VDD = 5 V
    7. 4.7 Operating Characteristics, VDD = 5 V
  6. 5Typical Characteristics
  7. 6Application and Implementation
    1. 6.1 Application Information
      1. 6.1.1 Driving Large Capacitive Loads
      2. 6.1.2 Driving Heavy DC Loads
  8. 7Device and Documentation Support
    1. 7.1 Receiving Notification of Documentation Updates
    2. 7.2 Support Resources
    3. 7.3 Trademarks
    4. 7.4 Electrostatic Discharge Caution
    5. 7.5 Glossary
  9. 8Revision History
  10. 9Mechanical, Packaging, and Orderable Information

6.1.1 Driving Large Capacitive Loads

The TLV2711 is designed to drive larger capacitive loads than most CMOS operational amplifiers. Figure 5-31 illustrate the ability to drive loads up to 600 pF while maintaining good phase margins (Rnull = 0 Ω).

A smaller series resistor (Rnull) at the output of the device (see Figure 6-1) improves the gain and phase margins when driving large capacitive loads. The addition of this series resistor has two effects. The first effect is that the series resistor adds a zero to the transfer function. The second effect is that the series resistor reduces the frequency of the pole associated with the output load in the transfer function.

The zero introduced to the transfer function is equal to the series resistance times the load capacitance. To calculate the improvement in phase margin, use Equation 1.

Equation 1. Δϕm1 = tan–1 (2 × π × UGBW × Rnull × CL)

where

  • Δϕm1 = Improvement in phase margin
  • UGBW = Unity-gain bandwidth frequency
  • Rnull = Output series resistance
  • CL = Load capacitance
TLV2711 Series-Resistance Circuit Figure 6-1 Series-Resistance Circuit