0°C – 100°C, Hardware-Compensated Ratiometric 3-Wire RTD System Reference Design

(ACTIVE) TIPD152

Description & Features

Technical Documents

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Key Document

Description

This TI Precision Verified Design implements a hardware compensated 3-wire RTD acquisition system that accurately measures temperature from  0°C - 100°C.  The voltage input and reference voltage are placed in a ratiometric configuration in order to reduce the errors from noise and drift and improve overall system accuracy. The ADS1247 simplifies the front-end solution through integration of the required current sources, programmable gain amplifier, and digitally-controlled multiplexer in to one chip. The current sources are chopped to minimize any mismatch between the two sources. The TPS7A4901 adjustable-output, high-PSRR LDO is suggested as a clean power alternative versus the existing USB supply to further improve system accuracy.

Features
  • Measures temperature from 0°C - 100°C from 3-wire RTD
  • Single-Supply Solution
  • Ratiometric configuration
  • Utilizes ADS1247, 24-bit ΔΣ ADC

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


  




TI Devices (2)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS1247  24-bit, 2kSPS, 4-Ch ADC With PGA, Reference and IDAC for Precision Sensor Measurement  Analog-to-Digital Converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
TPS7A49  Vin 3V to 36V, 150mA, Ultra-Low Noise, High PSRR, Low-Dropout Linear Regulator  Linear Regulator (LDO)  Sample & Buy View Design Kits & Evaluation Modules

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 1141 12 Dec 2013 736
Design files (3)
Title Abstract Type Size (KB) Date Views
ZIP 321 10 Jan 2014 187
PDF 68 10 Jan 2014 29
PDF 100 10 Jan 2014 308
Related Tools & Software

Software (2)




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