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Texas Instruments MSP430FR2355 | Demoboard TIDA-010019 REV
RTD replacement for cold junction compensation reference design in a temperature sensor
Overview
| Topology | Other Topology |
| IC revision | E2 |
Description
The cold-junction compensation is essential in temperature sensing using thermocouples. Every metal junction of different materials gives the thermo voltage. In the termocouple itself, but also where the thermo couple wires connect to the board a voltage is generated. The junction from the wires to the board is the so called cold-junction. The absolute temperature at this point has to be measured correctly to compensate the voltage developed here. The process of this compensation is the cold-junctioncompensation. This reference design shows different implementations for cold-junction compensation.The standard approach, using an RTD, is compared to different analog sensors, and integrated digital sensors. The design of a low-power front end for the thermocouple is also shown. The resulting performance of the different solutions are compared to each other. To compare different solutions, three boards are built using a different approach for CJC.
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.
Typical applications
- Temperature transmitter / Temperature controller / Analog input module
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | Pins | PCB/Cable/Panel | Modularity | Type | Wire Section | λDom typ.(nm) | Emitting Color | λPeak typ.(nm) | IV typ.(mcd) | VF typ.(V) | Chip Technology | 2θ50% typ.(°) | C | Tol. C | VR(V (DC)) | Size | Operating Temperature | Q(%) | DF(%) | RISO | Ceramic Type | L(mm) | W(mm) | Fl(mm) | Packaging | Mount | IR(A) | Working Voltage(V (AC)) | Color | Gender | H(mm) | Operation Force(g) | Electrical Life(Cycles) | Actuator Color | Washable | Vaporphase process | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WR-PHD Jumper, 1, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Jumper | Pins1 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +125 °C | – | – | Insulation Resistance1000 MΩ | – | Length2.44 mm | – | – | PackagingBag | – | Rated Current3 A | Working Voltage250 V (AC) | ColorBlack | GenderJumper | – | – | – | – | – | – | |||
 | WR-TBL Series 2109 - 2.54 mm Horiz. Entry, 2, Rising Cage Clamp | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-TBL Series 2109 - 2.54 mm Horiz. Entry | Pins2 | PCB/Cable/PanelPCB | ModularityNo | TypeHorizontal | Wire Section 30 to 18 (AWG) 0.2 to 0.75 (mm²) | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | – | – | – | Length5.48 mm | – | – | PackagingBox | MountTHT | Rated Current6 A | Working Voltage150 V (AC) | – | – | – | – | – | – | – | – | |||
 | WR-PHD Pin Header - Single, 4, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | Pins4 | – | – | TypeStraight | – | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | – | Insulation Resistance1000 MΩ | – | Length10.16 mm | – | – | PackagingBag | MountTHT | Rated Current3 A | Working Voltage250 V (AC) | – | GenderPin Header | – | – | – | – | – | – | |||
 | WR-PHD Pin Header - Single, 5, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | Pins5 | – | – | TypeStraight | – | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | – | Insulation Resistance1000 MΩ | – | Length12.7 mm | – | – | PackagingBag | MountTHT | Rated Current3 A | Working Voltage250 V (AC) | – | GenderPin Header | – | – | – | – | – | – | |||
 | WR-PHD Pin Header - Single, 6, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | Pins6 | – | – | TypeStraight | – | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | – | Insulation Resistance1000 MΩ | – | Length15.24 mm | – | – | PackagingBag | MountTHT | Rated Current3 A | Working Voltage250 V (AC) | – | GenderPin Header | – | – | – | – | – | – | |||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | Capacitance10 pF | Capacitance±5% | Rated Voltage50 V (DC) | Size0402 | Operating Temperature -55 °C up to +125 °C | Q-Factor600 % | – | Insulation Resistance10 GΩ | Ceramic TypeNP0 Class I | Length1 mm | Width0.5 mm | Pad Dimension0.25 mm | Packaging7" Tape & Reel | – | – | – | – | – | Height0.5 mm | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 10 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 10 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | Capacitance100 nF | Capacitance±10% | Rated Voltage10 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor5 % | Insulation Resistance5 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Pad Dimension0.4 mm | Packaging7" Tape & Reel | – | – | – | – | – | Height0.8 mm | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 16 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 16 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | Capacitance1 µF | Capacitance±20% | Rated Voltage16 V (DC) | Size0603 | Operating Temperature -55 °C up to +85 °C | – | Dissipation Factor10 % | Insulation Resistance0.1 GΩ | Ceramic TypeX5R Class II | Length1.6 mm | Width0.8 mm | Pad Dimension0.4 mm | Packaging7" Tape & Reel | – | – | – | – | – | Height0.8 mm | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 10 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 10 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | Capacitance10 µF | Capacitance±10% | Rated Voltage10 V (DC) | Size0805 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor10 % | Insulation Resistance0.01 GΩ | Ceramic TypeX7R Class II | Length2 mm | Width1.25 mm | Pad Dimension0.5 mm | Packaging7" Tape & Reel | – | – | – | – | – | Height1.25 mm | – | – | – | – | – | |||||
 | WS-TASV SMT Tact Switch 6.0x3.8 mm, –, – | Simulation– | Downloads6 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWS-TASV SMT Tact Switch 6.0x3.8 mm | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage12 V (DC) | – | Operating Temperature -40 °C up to +85 °C | – | – | Insulation Resistance100 MΩ | – | – | – | – | PackagingTape and Reel | – | Rated Current0.05 A | – | – | – | Height2.5 mm | Operation Force160 g | Electrical Life50000 Cycles | Actuator ColorBlack | WashableNo | Vaporphase processnot specified | ||
 | WL-SMCC SMT Mono-color Chip LED Compact, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SMCC SMT Mono-color Chip LED Compact | – | – | – | – | – | Dominant Wavelength [typ.]525 nm | Emitting ColorGreen | Peak Wavelength [typ.]515 nm | Luminous Intensity [typ.]800 mcd | Forward Voltage [typ.]3.2 V | Chip TechnologyInGaN | Viewing Angle Phi 0° [typ.]120 ° | – | – | – | Size0402 | Operating Temperature -40 °C up to +85 °C | – | – | – | – | Length1 mm | Width0.5 mm | – | PackagingTape and Reel | MountSMT | – | – | – | – | Height0.4 mm | – | – | – | – | – |