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MSP430F6775A: which design considerations we should make to pass surge test for measuring section/analog input section of energy meter?

Hemangi Nale
Prodigy 30 points
Part Number: MSP430F6775A

When we carry out the surge test we give surge on auxiliary supply side, in which for protection we have MOV but on measuring side we don't use that kind of protection for surge.

So what design considerations we must make for measuring section or analog input section of our circuit?

Can you please help?

  • 0
    TI__Genius 17960 points

    Hello,

    beside following good practices on the HW design, means layout, you can refer to e.g. the reference design www.ti.com/.../slaa577g.pdf

    please see specifically Figure 32. Schematics (2 of 4)

    Best regards

    Peter

  • 0 in reply to Peter Spevak
    Prodigy 30 points

    Yes, studied the figure you suggested.

    Thank you very much.

    Are there any specific consideration should be made for surge (for measuring section only) depending upon ADC which is been used?

    if yes, then what should we prefer for single ended ADC?

  • 0 in reply to Hemangi Nale
    TI__Genius 17960 points

    Hello,

    I am not sure if I understand your intentions perfectly. In principle the protection for a single ended ADC would be similar. Of course due to the single ended input you would have just the protectionexternals for just one input.

    In case of the MSP430F6775A the integrated SAR ADC is mainly intended to measure temperature with the integrated temperature sensor on chip, or measuring the voltage of the backup battery, where for both no special protection devices should be required.

    If you're considering other use cases, then please let me know in more detail your intentions.

    Best regards

    Peter

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