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AN1306

Download Application Note
Title
Title
Thermocouple Circuit Using MCP6V01 and PIC18F2550
Name
Name
AN1306
Date
Date
08/18/2020
Description
Description
This application note shows how to use a difference amplifier system to measure EMF voltage at the Cold Junction of thermocouple in order to accurately measure temperature at the Hot Junction. This can be done by using the MCP6V01 auto-zeroed op amp because of its extremely low input offset voltage (VOS) and very high Common-mode rejection ratio (CMRR). This solution minimizes cost by using resources internal to the PIC18F2550, such as 10-bit ADC and 4-bit adjustable reference, to achieve less than 0.1°C resolution from a measurement range of -100°C to 1000°C.

Development Tools

Title Part Number Title
MCP6V01RD-TCPL
MCP6V01 THERMOCOUPLE AUTO-ZEROED REFERENCE DESIGN
 MCP6V01RD-TCPL MCP6V01RD-TCPL MCP6V01 THERMOCOUPLE AUTO-ZEROED REFERENCE DESIGN

Silicon Products

Title Product Title
PIC18F2550
PIC18F2550
MCP6V01
300 µA, Auto-Zeroed Op Amps
 MCP6V01 300 µA, Auto-Zeroed Op Amps
MCP6V27
620 µA, 2 MHz Auto-Zeroed Op Amps
 MCP6V27 620 µA, 2 MHz Auto-Zeroed Op Amps