Re: MAX195

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#884

From: JW
Date: Thu, 26 Feb 2004 11:51

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On Wed, 25 Feb 2004 20:09:20 +0100 "Gerhard Glatte"
<gerhard.glatte@world4you.com> wrote in Message id:
<c1irvj$sal$1@newsreader1.utanet.at>:

>Hello Newsgroup,
>
>my name is Gerry and I currently work with a group on our diploma project
>(that's the final exam period of my school type). In this project we use the
>MAX195 16bit analogue digital converter.
>
>We have now the following problem:
>We made a printed circuit board and control the MAX195 directly with a PIC
>microcontroller (PIC16F877). The MAX195 converts the analogue signal
>correctly, but nearly every 3 seconds (it seems to be a periodic process)
>the converted voltage "jumps"(e.g. from 1,12568 to 1,13568), but the
>analogue signal (which has to be converted) does not.

Due to the fact that the incorrect result is off by only one bit, as a
guess, I'd say that either your clock is not properly synchronized to
your data (Try shifting the clock a bit) or your design has a dropout on
the serial clock - because it seems to occur on a regular basis, perhaps
the PIC is busy running some subroutine or something?

Technical Details

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From: JW <none@dev.nul>
Newsgroups: be.science.electronics,comp.publish.electronic.developer,japan.handmade.electronics,sci.electronics.components
Subject: Re: MAX195
Date: Thu, 26 Feb 2004 06:51:41 -0500
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