[sdiy] Thanks And Questions about digital control

[Tim Parkhurst]

You might also want to check the TLC7628

http://focus.ti.com/lit/ds/slas063a/slas063a.pdf

about the same price (actually a few cents cheaper I think), but the
difference between this one and the 7528 is "The TLC7628C operates from a
10.8V to 15.75V power supply and is TTL compatible over this range." Sounds
like it would be easier to interface to micros or 74 series TTL.



Tim (Dactrol = digitally controlled analog optosiolator?) Servo

"Home is where you hang your hat!" - Dr. Emilio Lizardo

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

> -----Original Message-----
> From: Johannes Öberg [mailto:johannes.oberg at gmail.com]
> Sent: Wednesday, March 09, 2005 10:49 AM
> To: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] Thanks And Questions about digital control
> 
> I'm looking at the multiplicating D/A solution. The only reasonably
> cheap IC I found was the dual 8-bit D/A TLC-7528 from TI. It doesn't
> cost more than 2 pots even in low quantities.
> 
> From what I could read out of the data sheet, it would fit our
> purposes perfectly - it's simple to use, doesn't require alot of
> external stuff, has a reasonable resolution, and since it's internally
> latched one wouldn't have to worry to much about the multiplexing. The
> principle drawing basicly says it is an array of resistors with
> digitally controlled switches. Have I got this right?
> 
> If I understand things correctly it will even go to 2.8 MHZ which
> should be enough for all sorts of things. So perhaps one should stock
> up on these?
> 
> However, since it is so much cheaper than the alternatives it sounds
> "too good"; I'm thinking I should smell some sort of rat...
> 
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