[sdiy] Crosspoint Switch [was: Which programable chip?]

[John Luciani]

On Fri, Apr 17, 2009 at 9:28 AM, Ian Smith <taciturn_unquiet at hotmail.com> wrote:
>
> Hey all,
> I ordered a sample of HA456 8x8 Analog crosspoint switch from Intersil to see how well that works. Yes, it's >technically a video switcher but I don't see why it wouldn't work for audio as well. At least that's what I plan on >finding out. It does have a max voltage supply of +/-6V but it shouldn't be too hard to regulate things down to >that. Am I right to assume that most audio runs +/-5V, or is that just Thomas Henry's stuff?

You may not get +-5V swing out of that device. In the datasheet
the gain is specified as 0.99 to 1.00 for a +-1.5V range. The
output voltage swing is specified for a +-2.5V range. Also the
min range spec for +-2.5V is +-2.2V which is a gain of about
0.88. Maybe raising the supply voltage and reducing the output
load would help.

(* jcl *)

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