Highly-Accurate, Loop-Powered, 4mA to 20mA Field Transmitter With HART® Modem Reference Design

(ACTIVE) TIDA-01504

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Key Document

Description

This reference design provides a solution for a loop-powered, highly-accurate, field (sensor) transmitter with a HART® modem. The design uses a partially-discrete 4-mA to 20-mA current transmitter, HART modem, microcontroller, and power conditioning blocks in realizing a smart field transmitter design. The design is compliant with the HART FSK Physical Layer Specification and has been registered with FieldComm Group™.

Features
  • Loop-powered, 4-mA to 20-mA current transmitter with DAC8740H HART modem and onboard power conditioning blocks
  • Less than 0.1% FSR total unadjusted error at room temperature
  • External protection circuitry with reverse polarity protection
  • Compliant with HART FSK Physical Layer Specification and registered HART device

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


  



Schematic/Block Diagram

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Design Guide

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Design Files

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Bill of Materials (BOM)

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TI Devices (8)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
DAC8740H  HART®, FOUNDATION Fieldbus™, and PROFIBUS PA-compliant modem with UART interface  Digital-to-analog converters (DACs)  Not Available View Design Kits & Evaluation Modules
DAC8830  16-bit, single-channel, ultra-low power, voltage output DAC  Digital-to-analog converters (DACs)  Sample & Buy Not Available
LM4132  0.05% 20ppm/°C Drift Precision Series Voltage Reference with Shutdown Enable”  Voltage references  Sample & Buy Not Available
MSP430FR5969  MSP430FR5969 16 MHz Ultra-Low-Power Microcontroller featuring 64 KB FRAM, 2 KB SRAM, 40 IO  MSP430 ultra-low-power MCUs  Sample & Buy View Design Kits & Evaluation Modules
OPA333  1.8V, 17µA, microPower, Precision, Zero-Drift CMOS Op Amp   Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
OPA335  0.05uV/C max, Single-Supply CMOS Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TPS7A4101  50V Input, 50mA, Single Output Low-Dropout Linear Regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS7B69-Q1  Automotive High-Voltage Ultra-Low-Iq Low-Dropout Regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
DAC8740H Download Download
DAC8830 Download Download
LM4132 Download Download
MSP430FR5969 Download Download
OPA333 Download Download
Download Download
Download Download
OPA335 Download Download
Download Download
TPS7A4101 Download Download
TPS7B69-Q1 Download
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Technical Documents

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

Datasheet (1)
Title Abstract Type Size (KB) Date Views
PDF 1838 18 Jun 2018
User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 900 20 Dec 2017 27
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 598 19 Dec 2017 12
ZIP 868 19 Dec 2017 13
PDF 834 19 Dec 2017 15
PDF 139 19 Dec 2017 10
PDF 200 19 Dec 2017 15
PDF 747 19 Dec 2017 55

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