LMP90100EB/NOPB National Semiconductor, LMP90100EB/NOPB Datasheet - Page 13

• Manufacturer Part Number: LMP90100EB/NOPB
• Description: EVAL BOARD FOR LMP90100
• Manufacturer: National Semiconductor

Specifications of LMP90100EB/NOPB

• Main Purpose: Interface, Analog Front End (AFE)
• Embedded: No
• Utilized Ic / Part: LMP90100
• Primary Attributes: 8 Programmable Output Data Rates Per Channel
• Secondary Attributes: SPI Interface
• Silicon Manufacturer: National
• Silicon Core Number: LMP90100
• Kit Application Type: Data Converter
• Application Sub Type: ADC
• Kit Contents: LMP90100 Evaluation Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5.0. Example #3 - 3-wire RTD Application
© 2009 National Semiconductor Corporation
A 3-wire RTD has a typical configuration shown in Figure 11. This section will explain how to configure the
LMP90100EB and software tool to evaluate a 3-wire RTD.
A. LMP90100EB Jumper Connections
1.
2.
3.
Jumper
JP11
JP1
JP2
JP4
JP6
JP7
Figure 20
The jumpers not mentioned in this table have to be left unconnected for this exercise.
SPIO-4 board is properly setup out of the box (no assembly required).
shows the schematic.
RTD from Omega
P/N: PRTF-10-2-100-1/4-6-E
WHITE
RED
RED
PT-100
RTD
Figure 11 - 3-Wire RTD Configuration
RLINE1
RLINE2
RLINE3
Jumper Connections
RREF = 1 kOhm
Pins 2 & 3
Pins 2 & 3
Pins 1 & 2
Pins 1 & 2
Pins 1 & 2
Pins 1 & 2
J10
4
1
2
3
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= 0 Ohm
RRTD2
with Sensor AFE Software User’s Guide
VIN1
IB2
VIN0
IB1
VIN6 / VREFP2
VIN7 / VREFN2
LMP90100
VA
lmp90100eb_usersguide_20101227_v23.doc
VA
1000 uA
LMP90100 Evaluation Board
VA = SPIO4_PWR
VIO = SPIO4_PWR
SPIO4_PWR = 3.3V
Connect VA to LMP90100
Connect VIO to LMP90100
Connect IB1 to VIN0
1000 uA
Purpose