Datasheet

March 2009 SNAU028A 11
Jumpers
Pin
Purpose
JP14: VREF_JMP2
P1-P2
Connect VREFP1 source to the LMP90100
JP14: VREF_JMP2
P3-P4
Connect VREFN1 source to the LMP90100
Table 2 - Jumpers for the Shorted Input Measurement
B. Installing/Opening the Software – skip this step if it’s already done. If not, follow section 9.0
to install and open the LMP90100 Sensor AFE software.
C. Connecting and Powering the Boards
1. Connect the LMP90100EB to the SPIO-4 board as seen in Figure 4.
2. Connect SPIO-4 board to a PC via USB.
3. Use a multimeter to measure LMP90100EB’s JP6 and JP7; they should all be approximately
5V, and JP14.P2 should be 4.1V. If they are not, check your power supplies and jumpers.
D. Configuring the LMP90100 Using the Sensor AFE Software
Follow the step-by-step instructions under the “HelpBar” mini-tab (left hand side of the GUI) to
configure the LMP90100 for this example. These step-by-step instructions are discussed in
details below, and the recommended configuration should look similar to figure 9.
Figure 9 - Recommended LMP90100 Configuration for the Shorted Input and Calibration Test
1. Step 1: Select a Sensor - select “DC”  “DC” since the input source is a DC voltage