RTD to Voltage Reference Design Using Instrumentation Amplifier and Current Reference

(ACTIVE) TIPD193

Description & Features

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Key Document

Description

This reference design translates resistance temperature detectors (RTD) resistance to a voltage level convenient for an ADC input. A precision current reference provides excitation and an instrumentation amplifier scales the signal. The design also uses a three wire RTD configuration to minimize errors due to wiring resistance.

Features
  •  Converts RTD resistance to voltage
  •  0 to 5V output across temperature range
  •  Eliminates lead resistance error
  •  Adjustable set with discrete resistors

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  



Schematic/Block Diagram

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Test Data

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Bill of Materials (BOM)

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
INA326  Precision, Low Drift, CMOS Instrumentation Amplifier  Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
REF200  Dual, 100-µA Current Source/Sink  Voltage references  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
INA326 Download Download
REF200 Download Download
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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 1241 28 Apr 2015 116
Design files (2)
Title Abstract Type Size (KB) Date Views
PDF 203 02 Jun 2015 2
PDF 24 02 Jun 2015 44
Related Tools & Software

Software (1)



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