Thermocouple AFE Using RTD or Integrated Temperature Sensor for Cold Junction Compensation (CJC)

(ACTIVE) TIDA-00168

Description & Features

Technical Documents

Support & Training

Order Now


View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

Key Document

Description

The sole objective of this reference design is to provide comprehensive details on how to design a simple, robust, and accurate analog front end (AFE) circuit for making precision temperature measurements with thermocouple sensors. TIDA-00168 explains the theory, operation, and complications involved in a step-by-step manner. Additionally, this reference design emphasizes topics like error analysis, the necessity of an anti-aliasing filter, biasing resistors for sensor diagnostics, CJC, linearization technique for sensor data, and the design challenges of printed circuit boards.

Features
  •  Sensor input: K-Type thermocouple
  •  Thermocouple Temperature range of –200°C to 1372°C
  •  Noise free resolution: 0.02ºC
  •  Cold Junction Compensation (CJC) using
  •  Resistance Temperature Detector (RTD) or the internal temperature sensor of the ADS1220
  •  Designed to meet IEC61000-4 Standards:
    • Electrical Fast Transients (EFTs), Electrostatic Discharge (ESD), and Surge
    • Field Transmitter operating temperature range of –40°C to 85°C

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  



Schematic/Block Diagram

Quickly understand overall system functionality.

Download Schematic

Test Data

Get results faster with test and simulation data that's been verified.

Download Test Data

Design Files

Download ready-to-use system files to speed your design process. Get Viewer.

Download Design Files


Bill of Materials (BOM)

Find the complete list of components in this reference design.

Download BOM

TI Devices (4)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS1220  24-Bit, 2kSPS, 4-Ch, Low-Power Delta-Sigma ADC With PGA and VREF for Small Signal Sensors  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
MSP430FR5949  MSP430FR5949 16 MHz Ultra-Low-Power Microcontroller featuring 64 KB FRAM, 2 KB SRAM, 33 IO  MSP430 ultra-low-power MCUs  Sample & Buy View Design Kits & Evaluation Modules
REF5020  Low Noise, Very Low Drift, Precision Series VOLTAGE REFERENCE  Voltage references  Sample & Buy Not Available
TCA9535  Remote 16-Bit I2C and SMBus, Low-Power I/O Expander With Interrupt Output and Config Registers  I2C  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ADS1220 Download Download
Download Download
MSP430FR5949 Download
REF5020 Download Download
Download Download
TCA9535 Download
Download Download
Download
Download -

Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.

Step 1: Download and install the free download.

Step 2: Download the Symbol and Footprint from the CAD.bxl file table.


Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 10770 16 Nov 2014 64
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 1690 24 Nov 2014 5
ZIP 10039 24 Nov 2014 11
PDF 1685 24 Nov 2014 6
PDF 331 24 Nov 2014 6
PDF 196 24 Nov 2014 8
PDF 559 24 Nov 2014 44
Related Tools & Software

Reference Designs  ( 5 )

Software (1)



Support & Training

Try our support forums.
Search expert answers for this part Ask a new question

Content is provided 'AS IS' by the respective TI and Community contributors and does not constitute TI specifications.
See terms of use.

Blogs