4-20mA Current Loop Transmitter Reference Design
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Key Document


The TIDA-00648 TI Design is an industry standard 4-20 mA current loop transmitter. It also allows injection of FSK modulated digital data into the 4-20 mA current loop for HART communication. 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.

  • 4- to 20-mA Current-Loop Output Signal
  • 16-Bit Resolution
  • Loop-Error Detection and Reporting
  • Programmable Output-Current Error Levels
  • Simple HART Modulator Interfacing
  • Designed to meet IEC 61000 Requirements

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Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
DAC161S997  16-Bit Precision DAC With Internal Reference and 4mA-to-20mA Current Loop Drive  Digital-to-analog converters (DACs)  Sample & Buy View Design Kits & Evaluation Modules
MSP430F5172  25 MHz MCU with 32KB Flash, 2KB SRAM, 10-bit ADC, comparator, DMA, 16-bit High Resolution timer  Microcontrollers (MCUs)  Sample & Buy View Design Kits & Evaluation Modules
TPS7A16  100-mA, 60-V, ultra-low-IQ, low-dropout (LDO) voltage regulator with power good and enable  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
DAC161S997 Download
MSP430F5172 Download -
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Download Download
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TPS7A16 Download Download
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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 1159 17 Sep 2015
Design files (6)
Title Type Size (KB) Date
ZIP 316 18 Sep 2015
ZIP 865 18 Sep 2015
PDF 1423 18 Sep 2015
PDF 205 18 Sep 2015
PDF 113 18 Sep 2015
PDF 553 18 Sep 2015
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Reference Designs (2)

Software development (1)

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