18F4520 A/D working weird

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  1. - 7th April 2005, 14:22 #15
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    First of all about the frequency, this CCD is being run very slow... approximately 3.6kHz and as such, the frequency of the vout signal is also 3.6khz.

    I will definitely take a look at the adcon 2 register to see if maybe that will fix the problem.

    We were using a simple buffer with a negative feedback loop and powered with positive 18V and negative 18V.

    I also read in the manual that the maximum input impedance for an analog signal is 2.5kohms. Does anyone know what the minimum or recommended impedance is>?

    Thanks for everyone's help. Hopefully I can figure out a way to get the PIC to work with this setup.
    Last edited by TurboLS; - 7th April 2005 at 15:35.
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