NB4N507ADEVB ON Semiconductor

NB4N507ADEVB NB4N507ADEVB Evaluation Board User s Manual NB4N507ADEVB LAB SETUP PROCEDURE Power Supply Connections and Output Termination Use high impedance probes of the oscilloscope or The NB4N507A has a positive supply pin, V , and a frequency counter to monitor the (LV)PECL CLKOUT DD negative supply pin, DUTGND. SMAGND is the ground outputs. plane for the SMA connectors. Spilt Power Supply (Optional) Power supply banana plug connectors for V , DD For some tests, an optional split or dual power supply DUTGND and SMAGND are provided in the corners of the technique can be used, however, doing so will double board. The (LV)PECL CLKOUT outputs have terminate the (LV)PECL outputs into 50 s of an nonstandard, open collector outputs and must be externally oscilloscope or a frequency counter, and will therefore, DC loaded and terminated. Thevenin equivalent load and appear to halve the output amplitude. Since V = V TT DD termination resistors are provided onboard at the outputs 2.0 V, off setting V by +2.0 V yields V = 0 V or DD TT SMA connector. Ground. The V terminal connects to the isolated TT Single Supply (Recommended) SMAGND connector ground plane, and is not to be Connect a single power supply to the evaluation board. confused with the device ground pin or DUTGND. (see Figure 2) Connect V to +3.3 V, Connect GND to DD 0 V. Table 1. POWER SUPPLY CONFIGURATIONS Device Pin Power Supply Single Supply Spilt Power Supply (Optional) V RED +3.3 V or +5.0 V V = +2.0 V DD DD SMAGND BLACK 0 V V = V 2.0 V = 0 V TT DD DUTGND BLACK 0 V DUTGND = 1.3 V (or 3.0 V) Power Supplies Dual Power Supplies +3.3 V +2.0 V +1.3 V + + + GND V V GND CC DD V TT +3.3 V +3.3 V Figure 3. Split Power Supply Connections Figure 2. Single Power Supply Configuration