Isolated RS-232 to UART Converter Reference Design TIDA-00163 (ACTIVE)

Description & Features

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Key Document

Description

This design implements an isolated data converter that utilizes residual power from the interface to power itself. This removes the requirement for expensive power transmission across the isolation boundary. By easily enabling the ubiquitous RS-232 connection on an electric meter, features like factory configuration and calibration can be performed by a wide range of test station hardware.

The 2.5kVRMS isolation boundary ensures that field technicians can safely connect to an e-meter, even after it is installed, to perform diagnostics, data retrieval, and field firmware updates.

The robust interface is installed, to perform diagnostics, data retrieval and field firmware updates. The robust interface is designed for data rates well beyond the RS-232 standard, to ensure that isolation will never be the limiting factor in a design.

Features
  • High voltage RS-232 isolation
  • Bit rates up to 1Mbps
  • 2.5kVRMS operating isolation boundary per UL
  • Integrated power harvesting for isolation and RS-232 transceiver
  • Operates with 5V to 12V RS-232 drivers

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Schematic/Block Diagram

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Test Data

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Design Files

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TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ISO7421  Dual Channel, 1/1, 1Mbps Digital Isolator   Isolation  Sample & Buy View Design Kits & Evaluation Modules
TPS763  Low Iq, 150-mA, Low-Dropout Linear Regulators  Power management  Sample & Buy View Design Kits & Evaluation Modules
TRS3232  3-V to 5.5-V Multichannel RS-232 Line Driver/Receiver With +/-15-kV ESD Protection  Interface  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ISO7421 Download -
TRS3232 Download -
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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 3607 23 Apr 2014
Design files (5)
Title Type Size (KB) Date
ZIP 41 22 May 2014
ZIP 32 22 May 2014
PDF 60 22 May 2014
PDF 72 22 May 2014
PDF 23 22 May 2014

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