Texas Instruments LMP90100 - Page 6

6 LMP90100 EVB User’s Guide August 2012
JP2: VIO_EXT
P1-P2
Source VIO externally
JP6
P1-P2
Connect VA supply to the LMP90100
JP7
P1-P2
Connect VIO supply to the LMP90100
JP10: VIN_JMP
P5-P6
Connect a DC input to VIN2
JP10: VIN_JMP
P7-P8
Connect a DC input to VIN3
JP13: VREF_JMP1
P3-P4
VREFP1 = 4.1V from U4 (LM4140)
JP13: VREF_JMP1
P9-P10
VREFN1 = ground
JP14: VREF_JMP2
P1-P2
Connect VREFP1 source to the LMP90100
JP14: VREF_JMP2
P3-P4
Connect VREFN1 source to the LMP90100
Table 1 - Jumpers for DC Measurement
B. Installing/Opening the Software - follow section 9.0 to install and open the LMP90100 Sensor
AFE software.
C. Connecting and Powering the Boards – these steps have to be done in this order.
1. Connect a 5.0V power supply to J1 (VA_EXT) and GND (J2). Don’t turn on the power
supply yet.
2. Connect a 5.0V power supply to J3 (VIO_EXT) and GND (J2). Don’t turn on the power
supply yet.
3. Turn on the power supply that is sourcing VA (J1), and then turn on the power supply that is
sourcing VIO (J3).
4. Connect the LMP90100EB’s JP12 to SPIO-4 Board’s J6 (pins 1-16). See Figure 4.
Figure 4 – LMP90100EB-to-SPIO-4 Board Connection
5. Connect SPIO-4 board to a PC via USB.
6. Use a multimeter to measure LMP90100EB’s JP6, JP7; they should all be approximately 5V.
If they are not, check your power supplies and jumpers. Measure JP14.P2; it should be
approximately 4.1V. If it’s not, check your jumpers and U4.
D. Configuring the LMP90100 Using the Sensor AFE Software