SLAAED5A June   2023  – September 2025 AFE11612-SEP , OPA4H199-SEP

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 LDMOS and GaN Power Amplifier FET PA Basics
  5. 2 VGS Compensation
  6. 3 Sequencing
  7. 4 An Integrated PA Biasing Solution
  8. 5 Negative Biasing for GaN PAs
  9. 6 Fast Switching for TDD Applications
  10. 7 VDRAIN Switching Circuit
  11. 8 Controlled Gate-Sequencing Circuit
  12. 9 VDRAIN Monitoring
  13. 10External Negative Power Supply Monitoring
  14. 11PA Temperature Monitoring
  15. 12Summary
  16. 13References
  17. 14Revision History

4 An Integrated PA Biasing Solution


AFE11612-SEP Typical Application

Figure 4-1 AFE11612-SEP Typical Application

The AFE11612-SEP is an integrated power-amplifier biasing solution that features twelve 12-bit precision Digital-to-Analog Converters (DACs), a sixteen-input 12-bit Analog-to-Digital Converter (ADC), and two pairs of remote temperature sensor inputs. The DAC outputs enable VGS control of up to twelve LDMOS PAs. GaN PAs can be supported with additional circuitry. The device also features robust PA monitoring and protection with programmable thresholds for the two remote temperature sensors and four of the ADC inputs.