ADRF5250-EVALZ is a 4-layer, Rogers 4350B based evaluation board. For normal operation, it requires a 3.3V or 5V VDD supply. There is also an incorporated negative supply generator which is enabled or disabled depending on applied VSS supply voltage. When VSS is 0V or -3.3V, negative supply generator is enabled or disabled respectively. The ADRF5250 has 3-bit 1.8V logic compatible control interface which is controlled through V1, V2, V3 test points, TP1, TP2 and TP4. V1 and V3 test points correspond to least significant bit (LSB) and most significant bit (MSB) of digital control interface of ADRF5250.
The modes of RF paths are determined per Digital Control Voltage Truth Table which can be found in the ADRF5250 data sheet. Further details can be found in the Applications Information section of the ADRF5250 data sheet.