[sdiy] SSI2164

[Mattias Rickardsson]

I'm already seeing some lower noise and lower THD with the SSI compared to
the Coolaudio part. I'm also having a misbehaving SVF, but as I managed to
ruin some solder pads when switching ICs, I think I'm the failing bit here.
Something must have ended up wrong... I hope. The quest continues.

/mr


On 14 March 2018 at 20:27, Michael Grossman <mgrossm1 at yahoo.com> wrote:

> Beyond analyzing the datasheet has anyone done an evaluation of the
> SSI2164 chip?
>
> Thanks,
> Mike
>
>
> On Wednesday, February 14, 2018 6:15 AM, Mattias Rickardsson <
> mr at analogue.org> wrote:
>
>
> On 14 February 2018 at 00:59, electronicpresskit <
> electronicpresskit at gmail.com> wrote:
>
> > On Feb 14, 2018, at 12:25 AM, Neil Johnson <neil.johnson71 at gmail.com>
> wrote:
> >
> >> I saw their CEO claim this in a NAMM video and the datasheet claims it,
> but
> >> then specs .025% THD which is .005% worse than the ssm2164 and V2164. I
> also
> >> compared a few of the graphs to see if there was a particular context in
> >> which it was improved but I did not find one.
> >>
> >> That has me wondering how it works!
> >
> > And you believe the ADI datasheet because.....?
> >
> > See if you can make sense of Figure 6 in the ADI datasheet.
>
> So we’ve got datasheet errors from both manufacturers right?
>
>
> All tree manufacturers.
> ADI happened to put a 20-20k axis in their diagram, and Coolaudio just
> copied all the diagrams including the obvious error... :-)
>
>
> The reason I asked the question is because I don’t know what to believe.
>
>
> Understandable. But the THD curves differs a lot from unit to unit, so I
> wouldn't compare those numbers very much. I'm not even sure how I would
> choose a number to publish, are there any engineering "rules" for this or
> is it up to the marketing departments? :-)
> Anyway, the THD statistics I've seen so far from SSI (not in the
> datasheet) indicate that most SSI chips are indeed performing better in
> this regard than most SSM and V chips. So far I have found exactly zero
> reasons to keep using the Coolaudio part.
>
> /mr
>
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