Communication Module Reference Design for Functional Isolated RS-485, CAN and I2C Data Transmission


Design files


The TIDA-01281 reference design is low cost, high efficiency, isolated RS-485, I2C & CAN communication module solution intended for use in industrial systems such as Uninterruptable Power Supplies (UPS) and energy storage banks that require isolated communication and isolated power for RS-485/I2C/CAN transceivers.  The design has on-board C2000-Piccolo microcontroller for handling the communications protocol for each of interfaces. The board has in-built, low component count, high efficiency, primary side controlled isolated power supply to generate secondary power for communication transceivers eliminating the need for opto-coupler feedback circuits.

The TIDA-01281 design is tested for data transmission under various conditions and under EFT and ESD environment, highlighting the performance of TI devices for robust data transmission in harsh environments.

  • Simple, efficient, and flexible isolated communication module for RS-485, CAN and I2C interface
  • Robust isolation performance for reliable operation in harsh environments meeting  functional Isolation and Immunity of 4000-VPK & 2500-VRMS, 560VPK working voltage
  • Common Mode Transient Immunity (CMTI) of  50 kV/us, for high immunity in noisy environments
  • Meets IEC-61000-4-2: ESD ±8kV contact discharge and indirect discharge by HCP and VCP , and IEC-61000-4-4: EFT ± 2kV for RS485 and ±1kV for CAN
  • A standalone control card with analog and digital interface of C2000 device for test and validation of power stages used in UPS, telecom rectifier, server PSU and battery management system
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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.


Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement

TIDRPC4.ZIP (2046 K)

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

TIDCD19.ZIP (1316 K)

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

TIDRPC3.PDF (1648 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

C2000 real-time microcontrollers

TMS320F28033C2000™ 32-bit MCU with 60 MHz, 64 KB flash, 4.6 MSPS ADC, CLA

Data sheet: PDF | HTML
C2000 real-time microcontrollers

TMS320F28033-Q1Automotive C2000™ 32-bit MCU with 60 MHz, 64 KB flash, 4.6 MSPS ADC, CLA

Data sheet: PDF | HTML
I2C isolators

ISO15412.5-kVrms, isolated unidirectional clock, bidirectional I2C isolator

Data sheet: PDF | HTML
Isolated CAN transceivers

ISO1050Isolated 5-V CAN transceiver

Data sheet: PDF | HTML
Isolated RS-485 transceivers

ISO3082200-Kbps, half-duplex, 2.5-kVrms isolated RS-485 & RS-422 transceiver

Data sheet: PDF | HTML
Transformer drivers

SN6505BLow-noise, 1-A, 420-kHz transformer driver with soft start for isolated power supplies

Data sheet: PDF | HTML

Technical documentation

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* Design guide Communication Module for Functional Isolated RS-485, CAN, and I2C Design Guide (Rev. A) Jan. 27, 2016

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