Hello, we are using AD7293 PA Bias controller for GaN PA in RU design for TDD Mode of operation.
it is 4Tx4R configuration. so we are using 1 nos of AD7293 for each GaN PA.
So overall we are using 4 nos of AD7293.
the query is, do we require all the GPIO connection to the FPGA( 7nos in total) for controlling the PA Functionality?
mean, are the GPIOs mandatory?
can we use only the SPI interface for FPGA control.
well, kindly let us know what the mandatory signals are required for the TDD mode of operation.
Regards,
Sumathi