Investigate the connection between the L1-L2 pins
From the AX5043 datasheet, page 16, "The carrier frequency range can be extended to 54 –525 MHz and 27 – 262 MHz by using an appropriateexternal inductor between device pins L1 and L2". But when the above option isn't needed the L1 and L2 pins are not connected?
From AX5043 datasheet, page 38, Figure 15., short between pins L2 and L1. Also the same from AP AND9315/D.
Edited by Agis Zisimatos