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[FAQ] TIDA-01434: How does ISOW7841 help achieve high channel density in PLC analog input modules?

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Part Number: TIDA-01434

How does ISOW7841 (quad-channel reinforced digital isolator with integrated high-efficiency power converter) help achieve high channel density in PLC analog input modules as shown in reference design TIDA-01434?

  • TIDA-01434 is an isolated, 3.65-mm thin TI Reference Design that enables highly-integrated, bipolar input and high-performance solutions with a 24-bit delta-sigma analog-to-digital converter (ADC). Modern analog input modules need high performance in different aspects such as higher channel density at the same room size, which requires lower power consumption, and a wider operating temperature range at the same time. The ISOW7841 is a high-performance, quad-channel reinforced digital isolator with an integrated high-efficiency power converter. The integrated DC-DC converter provides up to 650 mW of isolated power at high efficiency and can be configured for various input and output voltage configurations. Therefore these devices eliminate the need for a separate isolated power supply in space-constrained isolated designs.

    The ISOW7841 is a high-performance, quad-channel reinforced digital isolator with an integrated high-efficiency power converter. The integrated DC-DC converter provides up to 650 mW of isolated power at high efficiency and can be configured for various input and output voltage configurations. Therefore these devices eliminate the need for a separate isolated power supply in space-constrained isolated designs.

    TIDA-01434 makes use of ISOW7841s integration of data as well as highly efficient DC-DC isolation into a single chip. Thus SPI (serial peripheral interface) line and power isolation is achieved by using only a single isolation device and a couple of passive components. This minimizes size, component count, board complexity and consequently high channel density of the PLC analog input module.

    For additional information about this topic, please refer to section 2.1.1 "Design Considerations" of the User Guide for TIDA-01434.

    You can also download the design files (BOM, Schematic, Gerber) for this reference design from the TIDA-01434 folder.

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