SBAA631 January   2025 DAC80508 , INA592 , XTR111 , XTR300 , XTR305

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Analog Output Module Specification
  6. 3Analog Output Module Structure
  7. 4Multi-Channel Output Architectures
    1. 4.1 Fully Integrated DAC Architecture
    2. 4.2 Low Voltage DAC Plus an Output Buffer
    3. 4.3 Track and Hold Multiplexed Output
  8. 5Single-Channel Output Architectures
    1. 5.1 Fully Integrated DAC
    2. 5.2 Low-Voltage DAC Plus an Output Buffer
    3. 5.3 Pulse-Width Modulation Plus a Buffer
  9. 6Output Buffers
    1. 6.1 Unidirectional Current Buffer
    2. 6.2 Bidirectional Current Buffer
    3. 6.3 Voltage Buffer
    4. 6.4 Combined Voltage or Current Buffer
  10. 7Summary
  11. 8References

7 Summary

Understanding the design goals is crucial in selecting the correct architecture for PLC AOUT module. Generally higher integration provides higher accuracy and comes at higher cost, while less integrated architecture provides less cost and more flexibility in device selection. Starting from specifying the targeted number of channels, the resolution, and the conversion time (or speed) the designer can come quickly to the right DAC. Then by specifying the output type, range, and drive strength, the output buffer is selected. When the application demands higher precision or safety features, integrated designs have advantage. When application has special requirements, like high output voltage, high current drive, or high slew rate, the non-integrated design is typically necessary.