Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!jarthur!uunet!optilink!elliott
From: elliott@optilink.UUCP (Paul Elliott x225)
Newsgroups: sci.electronics
Subject: Re: fast A/D for video
Summary: Fujitsu, Brooktree
Message-ID: <6298@optilink.UUCP>
Date: 23 Apr 91 18:14:27 GMT
References: <1991Apr22.100053.1486@cs.ruu.nl>
Organization: Optilink Corporation, Petaluma, CA
Lines: 39

In article <1991Apr22.100053.1486@cs.ruu.nl>, clldomps@cs.ruu.nl (Louis van Dompselaar) writes:

> Can anyone help me with my quest for a fast A/D for video
> purposes. I now work with a A/D which only is 3 bit.
> It uses the ordinary 8 comparators, combiner etc.

> I want at least 5 bits (to get 32 grey shades) and might
> even consider 3 x 5 bit for a lot of colours.


Fujitsu makes 6 and 8-bit video A/D converters that convert at
20 M samples/sec (min, 30 M samples/sec typ), and they are pretty
cheap (around $10).

6-bit : MB 40576
8-bit : MB 40578

I've only seen these in the catalog, so don't know if they are really
available.


Brooktree makes lots of video conversion chips; they tend to be slower
than the above Fujitsu parts, but more highly integrated.  They have a
triple-ADC for color applications that looks interesting, and they will
gladly mail you lots of spec sheets and app notes.  They had a regular
media blitz going on a few months ago, but *now*, I can't find their
address in the stack of magazines on my desk.

There was a survey article on the subject in _EDN_ magazine (or it may
have been _Electronic Design_) a few months ago.  Perhaps a dozen
manufacturers were mentioned.

Fujitsu Microelectronics, Inc:
(408) 562-1000

-- 
Paul Elliott - DSC Optilink - {uunet, pyramid, tekbspa}!optilink!elliott
"...We spread out over all levels of all governments.  The threat of wars,
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