TIDA-010019
RTD replacement for cold junction compensation reference design in a temperature sensor
TIDA-010019
Overview
Temperature-sensing applications that use a thermocouple (TC) require an accurate local temperature sensor to achieve high accuracy. Solutions for design challenges such as cold-junction compensation (CJC) or including an ultra-low power TC analog front-end are highlighted and addressed in this reference design. Performance in terms of power consumption and accuracy is optimized for accurate 4 to 20 mA sensors while also demonstrating the performance of different CJC and TC front-end implementations.
Features
- Ultra-low power TC front end: < 200 µA
- RTD type performance with silicon temperature sensors
- 16-bit ADC for 0.05 °C resolution
- Comparing different CJC solutions
- TC temperature from -270 °C to 1200 °C
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Design files & products
Design files
Download ready-to-use system files to speed your design process.
TIDUEE1A.PDF (4160 K)
Reference design overview and verified performance test data
TIDRZC3.PDF (649 K)
Detailed schematic diagram for design layout and components
TIDRZC4.PDF (107 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDRZC5.PDF (540 K)
Detailed overview of design layout for component placement
TIDRZC7.ZIP (1712 K)
Files used for 3D models or 2D drawings of IC components
TIDCFD4.ZIP (381 K)
Design file that contains information on physical board layer of design PCB
TIDRZC6.PDF (2097 K)
PCB layer plot file used for generating PCB design layout
Products
Includes TI products in the design and potential alternatives.
MSP430 microcontrollers
MSP430FR2355 — 24-MHz 105-C integrated analog microcontroller with 32-KB FRAM, Op-Amps/PGAs, 12-bit DACs, 12-bit AD
Data sheet: PDF | HTMLStart development
Technical documentation
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | RTD Replacement for Cold Junction Compensation Reference Design (Rev. A) | Sep. 13, 2019 | |
| Application note | RTD Class-AA Replacement With High-Accuracy Digital Temperature Sensors in Field (Rev. A) | Jul. 22, 2019 |
Related design resources
Reference designs
REFERENCE DESIGN
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