JAJSDN8C March 2017 – April 2019 LMX2594
If fractional spurs are a large concern, using a ferrite bead to each of these power supply pins can reduce spurs to a small degree. This device has integrated LDOs, which improves the resistance to power supply noise. However, the pullup components on the RFoutA and RFoutB pins on the outputs have a direct connection to the power supply, take extra care to ensure that the voltage is clean for these pins. Figure 54 is a typical application example.
This device can be powered by an external DC-DC buck converter, such as the TPS62150. Note that although Rtps, Rtps1, and Rtps2 are 0 Ω in the schematic, they could be potentially replaced with a larger resistor value or inductor value for better power supply filtering.