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ADS42JB69: The Sysref signal input must be DC coupled?

Intellectual 390 points

Replies: 1

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Part Number: ADS42JB69

hello,Jim

    I found that the sysref signal of evm board ads42jb69EVM and dac38j84EVM are all DC coupled, Does sysref signal have to be DC-coupled?

1 Reply

  • Guru 54030 points

    Xiao,

    It does not. It can be AC coupled. The problem with AC coupling is that most users will turn off SYSREF once the link is established. With the source disabled, the signal could float and possibly cause a false trigger. Care must be taken when using this approach.

    Regards,

    Jim

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