Texas Instruments RHA0040B | Demoboard TIDA-00168

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

REMARK: Schematic and BOM is added

Typical applications

• Level Transmitter

More information

• Datasheet