TIDA-01171

AC-Coupled RS-485 Reference Design

TIDA-01171

Design files

Overview

The TIDA-01171 reference design allows for RS-485 communication over an AC-coupled link, even at very low data rates.  This allows for nodes to communicate even when large ground potential differences exist between nodes.  Using AC coupling also helps to protect transceivers from bus faults that can result in direct shorts to high-voltage power supplies.

Features
  • Provides functional isolation of RS-485 data links through series AC-coupling capacitors
  • Operates at data rates up to 1 Mbps
  • Works with existing MCU/UART interfaces
  • Uses only two wires for data transmission (no grounding wires are needed)

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUBZ8.PDF (4128 K)

Reference design overview and verified performance test data

TIDRML4.PDF (55 K)

Detailed schematic diagram for design layout and components

TIDRML5.PDF (95 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRML6.PDF (58 K)

Detailed overview of design layout for component placement

TIDRML8.ZIP (367 K)

Files used for 3D models or 2D drawings of IC components

TIDCCD7.ZIP (231 K)

Design file that contains information on physical board layer of design PCB

TIDRML7.PDF (323 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

RS-485 & RS-422 transceivers

SN65HVD3088ELow-power Half-duplex RS-485 Transceiver

Data sheet document-pdfAcrobat PDF open-in-new HTML
RS-485 & RS-422 transceivers

SN65HVD96SymPol Transceiver

Data sheet document-pdfAcrobat PDF
Inverting buffers & drivers

SN74LVC1G04Single 1.65-V to 5.5-V inverter

Data sheet document-pdfAcrobat PDF
JK flip-flops

SN74HC112Dual J-K Negative-Edge-Triggered Flip-Flops With Clear and Preset

Data sheet document-pdfAcrobat PDF

Technical documentation

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Type Title Date
* Design guide AC-Coupled RS-485 Design Guide Jun. 15, 2016

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