Datasheet

9 LMP91051EVM User’s Guide October 2012
3.3. Capturing Data
1. Click on the “Measurement” tab.
2. Under the “Output Format” field, select Display as “Output Voltage (V)”
3. Under the “Stop Condition” field, select Run as “1” Seconds. Alternatively, select “Run
Continuously” radio button to run continuously up to 1 hour.
4. Click on the “Run” button to view the output voltage results. A reading should be plotted as seen
in Figure . Output voltage will vary depending on input voltage across input (IN1/IN2) and CMOUT.
If J1/J2 are shorted, IN1/IN2 = CMOUT, output voltage should be about 1V. Note: Board is
provided with jumper J1/J2 open. Use provided jumper to short IN1/IN2 to CMOUT for easy
evaluation.
Figure 7: Results of DC Reading
3.4. Powering the LMP91051EVM
There are two ways in which VDD can be sourced: external supply or SPIO-4 power.
If using an external power supply to source VDD, do the following:
1. Connect an external power supply to banana jacks VDD-EXT and GND.
2. Jumper pins 2 and 3 of JP1 to connect the external power to VDD_DUT.
If using the SPIO-4 power to source VDD, then do the following:
1. Jumper pins 1 and 2 of JP1 to connect +3.3V SPIO-4 power to VDD_DUT.
The schematic for the LMP91051EVM can be seen in Figure 10.