Small Form Factor, 2-Wire 4 to 20mA Current Loop RTD Temperature Transmitter Reference Design

(ACTIVE) TIDA-00165

Description & Features

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Key Document

Description

This is a reference design for a robust, low power, precise and long-term stable 2-wire loop powered 4 to 20mA current output temperature transmitter. It uses RTD temperature sensor with 4 to 20mA current loop transmitter. It also explains sensor signal conditioning, ratiometric measurement technique, recommended software flow, calibration, sensor linearization, PCB layout and other practical design considerations. Furthermore, external protection circuitry is deployed in-place for compliance with regulatory IEC61000-4 standards – EFT, ESD and Surge requirements. EMC compliance to IEC61000-4 is necessary to ensure that the design not only survives but also performs as intended in the harsh/noisy industrial environment. All the relevant design files like Schematics, BOM, Layer plots, Altium files, Gerber and MSP430 MCU software have also been provided to the users.

Features
  • Small form factor (L X W): 71.12mm X 6mm
  • Sensor input compatible with 2-, 3- or 4-wire RTD probes
  • Connects to any RTD from PT100 to PT1000
  • Maximum measured error: 0.2°C
  • Output resolution: 0.76µA
  • Input power supply range: 10V to 33V DC

 


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TI Devices (4)

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
ADS1220  24-Bit, 2kSPS, 4-Ch, Low-Power Delta-Sigma ADC with PGA & VREF for Small Signal Sensors  Analog-to-Digital Converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
DAC161S997  SPI 16-bit Precision DAC for 4-20mA Loops  Digital-to-Analog Converters (DACs)  Sample & Buy View Design Kits & Evaluation Modules
MSP430FR5738  MSP430FR5738 24 MHz ULP microcontroller with 16 KB FRAM, 1 KB SRAM, 21 IO, 10-bit ADC and comparator  MSP430 ultra-low-power MCUs  Sample & Buy View Design Kits & Evaluation Modules
TPS7A16  60V, 5-µA Iq, 100-mA, Low-Dropout Voltage Regulator with Enable and Power Good  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 16567 11 Nov 2014 601
Solution guides (1)
Title Abstract Type Size (KB) Date Views
PDF 1318 31 Oct 2014 2,363
White papers (1)
Title Abstract Type Size (KB) Date Views
PDF 1238 12 Feb 2015 39
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 359 30 Jul 2014 60
ZIP 1880 30 Jul 2014 58
PDF 957 30 Jul 2014 121
ZIP 140 30 Jul 2014 31
PDF 208 30 Jul 2014 63
PDF 7610 30 Jul 2014 502
Related Tools & Software

Reference Designs (5)

Software (1)




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