Re: Horrid Serial Dacs

From: John Larkin (jjlarkin_at_highlandSNIPtechTHISnologyPLEASE.com)
Date: 09/06/04 

Date: Mon, 06 Sep 2004 16:57:10 -0700

On Tue, 07 Sep 2004 01:07:04 +0200, Andreas Hadler
<Andreas.Hadler@t-online.de> wrote:

>John Larkin <jjlarkin@highlandSNIPtechTHISnologyPLEASE.com> wrote:
>
>>Gosh but I hate serial DACs. Every one seems to have an apparently
>>random set of commands, chip-select timings, clock edge polarities,
>>powerdown rules, data formats, and justifications. The only thing they
>>seem to have in common is barely-readable timing diagrams and
>>gibberish instead of clear explanations of how the logic works.
>
>You're wellcome.
>
>What's the storey behind this rant?
>
>Andreas

Oh, I'm just coding up an embedded processor for an instrument that
has three different kinds of serial DACs (Burr PCM56 and Maxim 5742s
and 5205s) and they are all their own sort of mess. A few weeks ago I
had to persuade some Analog Devices parts to work. One Max chip uses
rising edge clock, the other is falling-edge. The 5742 has 35
different serial commands.

Bizarre.

John