I am currently building an RF amplifier PCB for around ~2.4 GHz using the MAX2616, which is a broadband RF amplifier for 40 MHz to 4000 MHz.

Looking at the datasheet, I am confused about the purpose of the 220nH inductor that lies between VCC and RFOUT.

Typically, I am accustomed to seeing an inductor connected to RFOUT to act as a choke, supplying DC to the amplifier to power it. However, in this case, the MAX2616 has a VCC input.

The evaluation board uses the Coilcraft 0603HP-R22XJLU that has an SRF of 1.1 GHz. The instructions specify measuring the output power of this board at 1000 MHz, so I am wondering if it was selected for this frequency?

Does this inductance value need to change for different frequencies, e.g. to have an SRF at the frequency I plan to operate the amplifier? Or is it fixed?

Many thanks in advance.

I am currently building an RF amplifier PCB for around ~2.4 GHz using the MAX2616, which is a broadband RF amplifier for 40 MHz to 4000 MHz.

Looking at the datasheet, I am confused about the purpose of the 220 nH inductor that lies between VCC and RFOUT.

Typically, I am accustomed to seeing an inductor connected to RFOUT to act as a choke, supplying DC to the amplifier to power it. However, in this case, the MAX2616 has a VCC input.

The evaluation board uses the Coilcraft 0603HP-R22XJLU that has an SRF of 1.1 GHz. The instructions specify measuring the output power of this board at 1000 MHz, so I am wondering if it was selected for this frequency?

Does this inductance value need to change for different frequencies, e.g. to have an SRF at the frequency I plan to operate the amplifier? Or is it fixed?