[sdiy] Beckman chips

[Theo]

There are also R2R networks around in this form up to12 bit usually better
than 1%.
Some times used in multimeters...
Theo


----- Original Message -----
From: John Loffink <jloffink at austin.rr.com>
To: 'harrybissell' <harrybissell at prodigy.net>; 'Peng' <peng3002 at yahoo.com>
Cc: 'SDIY' <synth-diy at dropmix.xs4all.nl>
Sent: Saturday, February 26, 2005 10:44 PM
Subject: RE: [sdiy] Beckman chips


> Typically resistor arrays were used for terminations in digital designs
> where the DIP packaging was convenient and allowed easy socketing.
>
> John Loffink
> The Microtonal Synthesis Web Site
> http://www.microtonal-synthesis.com
> The Wavemakers Synthesizer Web Site
> http://www.wavemakers-synth.com
>
>
> > -----Original Message-----
> > From: owner-synth-diy at dropmix.xs4all.nl [mailto:owner-synth-
> >
> > Back in the day they could have been machine inserted along with all the
> >
> > DIPs... just easy for layout.
> >
> > These networks are seldom any better than 5%.  Ratio matching 'may' be
> > better, thermal tracking should be much better than individual
> > resistors.
> > OTOH you don't normally need to worry about resistor temp matching...
> > 470 ohms is probably too low for almost all analog uses.
> >
> > They might be nice for seven segment LED dropping resistors...
> >
> > H^) harry
> >
> > Peng wrote:
> >
> > > I tested them with a DMM and they are eight seperate resistors in each
> > > and the resistance is 470 ohm and 220 ohm. Looks like the date is
> > > 1976. Umm... I wondered hat they were used for. Obviously I could use
> > > them instead of individual resistors, but they wouldn't save that much
> > > space. Just curious. P.v3
> > >
>
>
>