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

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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 (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)  Sample & Buy 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  Microcontrollers (MCU)  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  Single 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 (LDO) regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
DAC8740H 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
Download -

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Technical Documents

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Datasheet (2)
Title Type Size (KB) Date
PDF 3039 02 May 2019
PDF 1709 07 Dec 2018
User guides (1)
Title Type Size (KB) Date
PDF 900 20 Dec 2017
Design files (6)
Title Type Size (KB) Date
ZIP 598 19 Dec 2017
ZIP 868 19 Dec 2017
PDF 834 19 Dec 2017
PDF 139 19 Dec 2017
PDF 200 19 Dec 2017
PDF 747 19 Dec 2017

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