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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 | Product series | Application | PCB/Cable/Panel | Modularity | 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) | H (mm) | Operation Force (Value) (g) | Electrical Life (Cycles) | Actuator Color | Vaporphase process | Pins | Rows | Gender | Type | IR (A) | Packaging | Color | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 691210910002 | SPEC | – | 6 files | WR-TBL Series 2109 - 2.54 mm Horiz. Entry | Rising Cage Clamp | PCB | No | 30 to 18 (AWG) 0.2 to 0.75 (mm²) | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +105 °C | – | – | – | – | 5.48 | – | – | – | – | – | – | – | 2 | – | – | Horizontal | 6 | Box | – | |
 | 885012005055 | SPEC | 8 files | WCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | – | – | – | – | 10 pF | ±5% | 50 | 0402 | -55 °C up to +125 °C | 600 | – | 10 GΩ | NP0 Class I | 1 | 0.5 | 0.25 | 0.5 | – | – | – | – | – | – | – | – | – | 7" Tape & Reel | – | ||
| 885012206020 | SPEC | 8 files | WCAP-CSGP MLCCs 10 V(DC) | – | – | – | – | – | – | – | – | – | – | – | 100 nF | ±10% | 10 | 0603 | -55 °C up to +125 °C | – | 5 | 5 GΩ | X7R Class II | 1.6 | 0.8 | 0.4 | 0.8 | – | – | – | – | – | – | – | – | – | 7" Tape & Reel | – | ||
| 885012106017 | SPEC | 8 files | WCAP-CSGP MLCCs 16 V(DC) | – | – | – | – | – | – | – | – | – | – | – | 1 µF | ±20% | 16 | 0603 | -55 °C up to +85 °C | – | 10 | 0.1 GΩ | X5R Class II | 1.6 | 0.8 | 0.4 | 0.8 | – | – | – | – | – | – | – | – | – | 7" Tape & Reel | – | ||
| 885012207026 | SPEC | 8 files | WCAP-CSGP MLCCs 10 V(DC) | – | – | – | – | – | – | – | – | – | – | – | 10 µF | ±10% | 10 | 0805 | -55 °C up to +125 °C | – | 10 | 0.01 GΩ | X7R Class II | 2 | 1.25 | 0.5 | 1.25 | – | – | – | – | – | – | – | – | – | 7" Tape & Reel | – | ||
 | 434121025816 | SPEC | – | 5 files | WS-TASV SMT Tact Switch 6.0x3.8 mm | – | – | – | – | – | – | – | – | – | – | – | – | – | 12 | – | -40 °C up to +85 °C | – | – | 100 MΩ | – | – | – | – | 2.5 | 160 | 50000 | Black | not specified | – | – | – | – | 0.05 | Tape and Reel | – | |
 | 60900213421 | SPEC | – | 3 files | WR-PHD 2.54 mm Multi-Jumper Jumper with Test Point | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +125 °C | – | – | 1000 MΩ | – | 2.44 | – | – | – | – | – | – | – | 1 | – | Jumper | – | 3 | Bag | Black | |
 | 61300411121 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Pin Header | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +105 °C | – | – | 1000 MΩ | – | 10.16 | – | – | – | – | – | – | – | 4 | Single | Pin Header | Straight | 3 | Bag | – | |
| 61300511121 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Pin Header | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +105 °C | – | – | 1000 MΩ | – | 12.7 | – | – | – | – | – | – | – | 5 | Single | Pin Header | Straight | 3 | Bag | – | |
| 61300611121 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Pin Header | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +105 °C | – | – | 1000 MΩ | – | 15.24 | – | – | – | – | – | – | – | 6 | Single | Pin Header | Straight | 3 | Bag | – | |
 | 150040GS73240 | SPEC | 6 files | WL-SMCC SMT Mono-color Chip LED Compact | – | – | – | – | 525 | Green | 515 | 800 | 3.2 | InGaN | 120 | – | – | – | 0402 | -40 °C up to +85 °C | – | – | – | – | 1 | 0.5 | – | 0.4 | – | – | – | – | – | – | – | – | – | Tape and Reel | – |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Product series | Application | PCB/Cable/Panel | Modularity | 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) | H (mm) | Operation Force (Value) (g) | Electrical Life (Cycles) | Actuator Color | Vaporphase process | Pins | Rows | Gender | Type | IR (A) | Packaging | Color | Samples |
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