Getting Started - Microchip Technology PT100 RTD User Manual

PT100 RTD Evaluation Board User's Guide
2.3

GETTING STARTED

This section describes how to quickly configure the PT100 RTD Evaluation Board. A
simplified block diagram of the configuration is provided in Figure 2-1.
USB
PC
FIGURE 2-1: PT100 RTD Evaluation Board Simplified Block Diagram.
2.3.1
1. Connect the USB cable to PC.
2. To measure PCB temperature, connect JP1 to Local RTD position and JP2 to
RTD position.
+
SPI
ADC
3
–
MCP3301
FIGURE 2-2: Simplified PT100 RTD Evaluation Board Schematic.
DS51607A-page 8
PT100 RTD Evaluation Board
ADC
Hardware Setup
SPI
3
SPI
3
+
–
Differential
Amplifier
CH0
CH1
Diff Amp
V
REF
SPI
CH0
CH1
PGA
MCP6S26
V
REF
JP1
RTD
RTD
V V
DD DD
SPI
3
3
RTDs
© 2006 Microchip Technology Inc.