SLAA946 April   2021 AFE10004

 

  1.   Trademarks
  2. 1LDMOS and GaN Power Amplifier FET Basics
  3. 2VGS Compensation
  4. 3Sequencing
  5. 4An Integrated PA Biasing Solution
  6. 5Temperature Compensation
  7. 6Fast Output Switching
  8. 7Controlled Sequencing With the AFE10004
  9. 8Conclusion

4 An Integrated PA Biasing Solution


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Figure 4-1 AFE10004 Typical Application

The AFE10004 is an integrated power amplifier biasing solution that integrates precision DACs with a temperature sensor to allow for closed-loop temperature compensation of four individual GaN or LDMOS FETs. The device features start-up and shutdown logic to control the input sequencing of the PA for safe power-up and power-down control. Also, it integrates low on-resistance (RON) switches to allow for fast switching between the VGS-on voltage and the pinch-off voltage.