AD7657-1: How to improve noise of CH1?

Hello,

Our customer has a trouble about AD7657-1. Only CH 1 is noisy as compared to other CHs. Do you have any idea about causes ans/or countermeasures?

Best regards,

Akira

Parents
  • 0
    •  Analog Employees 
    on Jan 10, 2016 7:27 PM

    Hi Akira,

           The layout and schematic for the AD7657 and AD7657-1 are the same.  I am sending the schematic and layout of the board on your personal email. But please take note on the schematic diagram, there is a note regarding using capacitor for AD765x and AD765x-1.

    "

    Note 1

    For the Eval-AD765xSDZ boards use the following cap for C11, C30-C32, 34,35,38,39 JOHANSON DIELCTERIC - 6R3R15X476MV4E - MLCC, 0805, X5R, 6.3V, 47UF FEC 1886100"

    Regards,

    Jonathan

Reply
  • 0
    •  Analog Employees 
    on Jan 10, 2016 7:27 PM

    Hi Akira,

           The layout and schematic for the AD7657 and AD7657-1 are the same.  I am sending the schematic and layout of the board on your personal email. But please take note on the schematic diagram, there is a note regarding using capacitor for AD765x and AD765x-1.

    "

    Note 1

    For the Eval-AD765xSDZ boards use the following cap for C11, C30-C32, 34,35,38,39 JOHANSON DIELCTERIC - 6R3R15X476MV4E - MLCC, 0805, X5R, 6.3V, 47UF FEC 1886100"

    Regards,

    Jonathan

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