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

(ACTIVE) TIDA-00168

Description & Features

Technical Documents

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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.


  




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 & 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 Reference  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

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 1,135
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 1690 24 Nov 2014 71
ZIP 10039 24 Nov 2014 48
PDF 1685 24 Nov 2014 73
PDF 331 24 Nov 2014 21
PDF 196 24 Nov 2014 38
PDF 559 24 Nov 2014 273
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Reference Designs (5)

Software (1)




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