[sdiy] Re: Inexpensive 16 bit DAC?

[Tim Parkhurst]

That's not a bad idea. :-) The DAC312HP is a 12-bit parallel interface MDAC,
good specs, and it's available from Digi-Key in DIP or SOIC for under eight
bucks. Looks like a good DIY part.

Tim (available for slightly more than eight bucks) Servo

"Imagination is more important than knowledge." - Albert Einstein

**************************************

> -----Original Message-----
> From: Luís Marka [mailto:luis.marka at terra.com.br]
> Sent: Thursday, April 28, 2005 11:14 AM
> To: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] Re: Inexpensive 16 bit DAC?
> 
> Or why not go with the Analog Devices DAC312HP (or HS, for the surface
mount
> option)? It is a 12-bit DAC, equivalent to the AM6012, used in the
> Memorymoog and Jupiter 8.
> 
> ----- Original Message -----
> From: "Tim Parkhurst" <tparkhurst at siliconbandwidth.com>
> To: <synth-diy at dropmix.xs4all.nl>
> Sent: Thursday, April 28, 2005 2:45 PM
> Subject: RE: [sdiy] Re: Inexpensive 16 bit DAC?
> 
> 
> > What about the trick Oberheim used on the Matrix 12? Or was it the OB
> > series? Anyway, they used an 8 bit DAC, but in places where they need
> higher
> > resolution (VCO fine tune, fer example), they used a fairly simple trick
> to
> > get (approx) 12 to 13 bit resolution:
> >
> > Set DAC Vref to its 'normal' level. Say +10V
> > Convert 8 MSB, store analog result in S/H
> > Set DAC Vref to lower level. Say 1V
> > Convert 8 LSB, add analog result to MSB conversion.
> >
> > Basically, you take two 8-bit samples, but you change the Vref for the
LSB
> > sample and add the two results. The voltage levels I have listed above
are
> > only examples, but you get the basic idea.
> >
> >
> > Tim (lots of basic ideas) Servo
> >
> > "Imagination is more important than knowledge." - Albert Einstein
> >
> > **********************************
> 
> --
> No virus found in this incoming message.
> Checked by AVG Anti-Virus.
> Version: 7.0.308 / Virus Database: 266.10.4 - Release Date: 4/27/2005
> 

-- 
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.308 / Virus Database: 266.10.4 - Release Date: 4/27/2005
 



***************************************************************************
This message is confidential.  The information contained in
this e-mail message is intended only for confidential use of the
recipient(s) named above. If the reader of this message is not the intended
recipient or an agent responsible for delivering it to the intended
recipient, you are hereby notified that you have received this document in
error and that any review, dissemination, distribution, or copying of this
message is strictly prohibited.  If you have received this communication in
error, please notify us immediately by e-mail, and delete the original
message.
***************************************************************************