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


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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Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (5)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ISO1050  Isolated 5-V CAN transceiver  Isolated interfaces  Sample & Buy View Design Kits & Evaluation Modules
ISO1541  2.5-kVrms isolated unidirectional clock, bidirectional I2C isolator  Isolated interfaces  Sample & Buy View Design Kits & Evaluation Modules
ISO3082  2.5 kVrms Isolated 5 V Half-Duplex RS-485 Transceiver  Isolated interfaces  Sample & Buy View Design Kits & Evaluation Modules
SN6505B  Low-noise 1-A, 420-kHz transformer driver for isolated power supplies  Isolation  Sample & Buy View Design Kits & Evaluation Modules
TMS320F28033  Piccolo™ 32-bit MCU with 60 MHz, 64 KB Flash, CLA  Microcontrollers (MCU)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ISO1050 Download -
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ISO1541 Download Download
ISO3082 Download Download
SN6505B Download Download
TMS320F28033 Download
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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 5505 27 Jan 2016
Design files (6)
Title Type Size (KB) Date
ZIP 1316 19 Dec 2016
ZIP 2046 19 Dec 2016
PDF 1648 19 Dec 2016
PDF 209 19 Dec 2016
PDF 126 19 Dec 2016
PDF 251 19 Dec 2016

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