Digital Isolator for SPI Interface

Hi,

For our new project, we are planning to isolate the digital signal ( SPI Interface ) used in between a Micro controller & an ADC. Our isolation requirement is 1.5kV.

Supply voltage will be 3.3V or 5V.

  1. Could you please suggest us the best Digital Isolator  part number from Analog Device, which is being used for the SPI Interface isolation.
  2. Also please let me know, whether you have any Digital Isolator which isolates both data & power

Best Regards

Sharvy

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  • 0
    •  Analog Employees 
    on Apr 25, 2016 5:42 PM

    Hi Sharvy,

    A  nominal supply voltage of 3.3V or 5.0V will power all SPIsolator Digital Isolators. The ADuM3150/ADuM3151/ADuM3152/ADuM3153 SPIsolator devices will cover your isolation requirement. The ADuM3150 device will support a SPI clock rate up to 40MHz and has 2 independent low speed data channels. The ADuM3151/ADuM3152/ADuM3153 devices support SPI clock rates up to 17MHz and have 3 independent low speed data channels in different directional configurations.

    isoPower would be the product line for isolated power and data. The isoPower product selection guide is here:

    http://www.analog.com/en/products/interface-isolation/isolation/isopower.html

    There are isoPower devices with data channels included in the same package. They are available with 2 or 4 data channels in different forward/reverse  directional configurations. The isoPower devices are available for 150mW and 500mW isolated output power. What are the power and data channel counts needed? I can help narrow down the selection.

    Thanks,

    Jason

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  • 0
    •  Analog Employees 
    on Apr 25, 2016 5:42 PM

    Hi Sharvy,

    A  nominal supply voltage of 3.3V or 5.0V will power all SPIsolator Digital Isolators. The ADuM3150/ADuM3151/ADuM3152/ADuM3153 SPIsolator devices will cover your isolation requirement. The ADuM3150 device will support a SPI clock rate up to 40MHz and has 2 independent low speed data channels. The ADuM3151/ADuM3152/ADuM3153 devices support SPI clock rates up to 17MHz and have 3 independent low speed data channels in different directional configurations.

    isoPower would be the product line for isolated power and data. The isoPower product selection guide is here:

    http://www.analog.com/en/products/interface-isolation/isolation/isopower.html

    There are isoPower devices with data channels included in the same package. They are available with 2 or 4 data channels in different forward/reverse  directional configurations. The isoPower devices are available for 150mW and 500mW isolated output power. What are the power and data channel counts needed? I can help narrow down the selection.

    Thanks,

    Jason

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