Q1.According to the pin description in the data sheet, a 220nH inductor is to be connected to the RFOUT pin. According to the pin description in the data sheet, a 220nH inductor is to be connected to the RFOUT pin. Can you explain the purpose of this inductor? Also, do you have any documentation about it?
Q2.When a negative signal is input, will amplification be performed with a fixed gain without any problem?
A1: 200nH inductor placed at RFOUT and VCC is aim to provide a bias for output port, and also a filter to reject noise from power supply.
A2: No worry about the AC coupled signal. DC bias was set internal.