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LMP92066EVM: request guidance to use LMP92066 EVM dual channel switch in hybrid LDMOS / Gan mode

Part Number: LMP92066EVM
Other Parts Discussed in Thread: LMP92066, AMC7832

I am an RF engineer using LMP92066 EVM to bias LDMOS and Gan Power amplifiers (PA).
I like to use it to drive an hybrid PA composed of one stage LDMOS and a second stage Gan, meaning I like to control on channel 1 a voltage between 0 & 5V and on channel 2 a voltage between -2.5 & -5V, is it doable with this EVM board please ?
I tried but both channel of LMP92066 switch have the same VSSB reference voltage, this common voltage prevent me to perform such hybrid mode bias control. beside when a negative voltage is detected on supply input the full switch move to Gan mode, this mode doesn't seems to be selected per channel.
Does TI offer another dual channel temperature controlled DAC which may enable this hybrid LDMOS / Gan mode  control please ?

  • Hi Pierre,

    The LMP92066 can only support one output range (GaN or LDMOS), and we do not have any other devices that support dual ranges AND have integrated switches.  We do have devices that can support two ranges, such as the AMC7832, but it does not integrate the switches. How many channels are you implementing in your system? It might be worthwhile to use a device like the AMC7832 and implement external switches.

    Thanks,

    Paul

  • Thanks for this answer,

    The PA device I am switching have 2 stages: one LDMOS one GAN and then does require 2 channels.

    It is in TI's roadmap to introduces such hybrid mode dual channel switch in the future please ?