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PGA460: Ferrite bead recommendation for PGA460.

Oscar Gomez Fuente
Expert 2066 points
Part Number: PGA460

Hi everyone,

Does anyone a recommendation part number for the ferrite bead on page 104 of the PGA460 datasheet?

Best regards.

  • 0
    TI__Mastermind 27950 points
    Hi Oscar,
    The ferrite bead is optional. If grounding/system noise is not a major concern, then you can use a 0-Ohm resistor to bridge the analog and digital grounds. We can not recommend a specific ferrite bead value since it is a system dependent process based on the frequency of the unwanted noise. Refer to"Filtering Techniques: Isolating Analog and Digital Power Supplies" on examples to calculate a filter specific values: www.ti.com/.../scaa048.pdf
  • 0 in reply to Akeem Whitehead
    Expert 2066 points

    Hi,

    Thank you very much for your help. The Application note is very useful. But I have a question, I was trying to see this link:

    Because I'm very interested in how to measure the ESR fo a capacitor, but it doesn't work. Could you check if the link is right?

    Best regards.

  • 0 in reply to Oscar Gomez Fuente
    TI__Mastermind 27950 points

    Hi Oscar,

    It looks like this URL no longer exists. This app note was written in the year 2001, so you will need to perform a web search to find a more recent/alternative instructional on measuring a capacitor's ESR. I will send a note to our technical writers to remove and/or update this app note's broken links.