NB4N855SMEVB ON Semiconductor

NB4N855SMEVB Evaluation Board User s Manual for NB4N855S NB4N855SMEVB Figure 2. Evaluation Board Layup Connecting Power and Ground Planes The side launch 9 pin power supply connector is wired as the PCB to accommodated easier connections. Exact values shown in Figure 3. Test points can be soldered on the top of that need to be applied can be found in Table 1. Table 1. Power Supply Levels V V / GND DUT GND CC EE (Pin 10) (Pin 5) (PCB SMA Ground)) Power Supply Span 3.0 V 1.75 V 1.25 V 0 V 3.3 V 2.05 V 1.25 V 0 V 3.6 V 2.35 V 1.25 V 0 V DUT GND NC NC V V CC CC V DUT GND V /GND CC EE V /GND EE Figure 3. Power Supply Connector 9 Pin Side View (Left) and PCB Top View (Right) Stimulus (Generator) Termination All ECL outputs need to be terminated to V (V = V bottom side of the evaluation board. Solder the chip resistors TT TT CC 2.0 V = GND) via a 50 resistor. The current board design to the bottom side of the board between the appropriate input utilizes the space for placement of the external termination of the device pin pads and the ground pads as shown in resistors. (More information on termination is provided in Figure 4 (for split power supply setup, PCB is assembled in AN8020). The 0402 chip resistor pads are provided on the this configuration).