[sdiy] MIDM-CV DACs, Part #3 (last)

[Theo]

> e.g. DAC714P.  The datasheet also gives another parameter "monotonicity"
as 14bits.

This just means you don't want to listen to this DAC ;)

Don't know if I put it "technically" right, but you could think of this as:
The 15th bit step is smaller than the error.
As a result the output voltage is no longer guaranteed to increase
"monotonically".
This is math geek speak for: the output voltage might even get lower with
the next step up!

As example on a 4 bit DAC with  3 bit monotonicity
the output for 0110 might by _larger_ than that for 0111.


Theo


----- Original Message -----
From: Seb Francis <seb at is-uk.com>


> Paul Schreiber wrote:
>
> > The rule is: for every 1/2LSB of INL error, you effectively give up 1
'perfect' bit. A 12-bit
> > +-1LSB INL DAC has the same accuracy as a 'perfect' 10-bit DAC.
>
> Now I'm confused.  Are you saying that a 16 bit +-4LSB DAC is the same as
a perfect 8-bit DAC?
>
> e.g. DAC714P.  The datasheet also gives another parameter "monotonicity"
as 14bits.
>
>
> Seb
>
>