• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 46 subscribers
  • Views 134 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AMC7932: vs the AMC7834 vs the AMC7836: are any of these appropriate for TDD?

Ryan Guerra
Prodigy 85 points
Part Number: AMC7932
Other Parts Discussed in Thread: AMC7834, AMC7908, AMC7836

Tool/software:

Hello, I am selecting a Bias controller for the NXP A5M36TG240. My application is TDD. I was looking at the AMC7908, but interested in a bias controller with more channels so that I can use 1 Bias Controller per 2 or more PAs. Do the any of these parts: AMC7932, AMC7834, or AMC7836 have a track record of being used for TDD?

  • 0
    TI__Genius 11520 points

    Hi Ryan,

    The AMC7908 can bias up to 8 gates, so you could bias 2 of these PAs. The main limiting factor here would be the lack of current monitors, you would need to add multiple current monitors for this PA. The other AMCs don't have internal switches, so you would require an external switch to implement TDD. 

    Thanks,
    Erin 

  • 0 in reply to Erin Bowrie
    Prodigy 85 points

    Hi Erin, am I understanding this correctly that if I want to use all 8 DACs on the AMC7908, only 4 of them will be capable of fast turn on and off, and the other 4 will be able to fast turn off, but not on? 
     

    Any idea if there's a typical convention which transistor to turn on and off fast? The carrier vs the peaking?

  • 0 in reply to Ryan Guerra
    TI__Genius 11520 points

    Hi Ryan,

    You are correct. You will probably want to talk with the PA engineers for more specific application use, but in general we see people using the fast turn off/on for the carrier, and the peaking stays stable.

    Thanks,
    Erin