[sdiy] SSI2164 datasheet updated

Tim Ressel timr at circuitabbey.com
Wed Aug 8 04:24:00 CEST 2018


I think that is what I was trying to say but the heat wave in Portland 
is melting by brain...


On 8/7/2018 7:20 PM, Quincas Moreira wrote:
> I say keep the diode in case somebody drops in an SSM as a replacement...
>
> On Tue, Aug 7, 2018 at 7:53 PM Tim Ressel <timr at circuitabbey.com 
> <mailto:timr at circuitabbey.com>> wrote:
>
>     Yeah, upon further study I realize it is moot. 0 Volts = unity
>     gain and
>     higher voltages reduce the gain i.e. attenuate. The SSM2164 sez max
>     voltage on the control port is -V to +V while the SSI2164 data sheet
>     doesn't seem to say anything about range so I assume it is the same.
>
>     So I dropped my flag in error. Sorry about that.
>
>     Apparently the protection diode is not needed with the SSI2164 but
>     maybe
>     use it anyway. They is cheap.
>
>     All in all a good chip. Glad it is available.
>       --tr
>
>     On 8/7/2018 3:15 PM, Tom Wiltshire wrote:
>     > No, it means the original datasheet was full of nonsense. That
>     0-5V input was never correct, and didn’t make sense even with the
>     rest of the stuff they said.
>     >
>     >> On 7 Aug 2018, at 22:35, Tim Ressel <timr at circuitabbey.com
>     <mailto:timr at circuitabbey.com>> wrote:
>     >>
>     >> Flag on the play
>     >>
>     >> The SSI2164 is saying 0 to 3.3 volts on the control port for
>     attenuation whereas the SSM2164 says 0 to 5 volts. Does this mean
>     it is not a direct replacement for the SSM2164?
>     >>
>     >> --TimR
>     >>
>     >>
>     >> On 8/7/2018 1:41 PM, Neil Johnson wrote:
>     >>> Hi all,
>     >>>
>     >>> Anyone with more than a passing interest in the 2164 quad VCA
>     might be
>     >>> interested in the latest version of the SSI2164 datasheet just
>     >>> published online by Sound Semiconductor.
>     >>>
>     >>> While specifically for the SSI2164 there is a lot of useful
>     info there
>     >>> that also relates to the earlier SSM2164 (and the
>     Behringer/CoolAudio
>     >>> V2164 clone).
>     >>>
>     >>> Highlights for me:
>     >>> * Explanation and formula for working out the compensation network
>     >>> (confirms my earlier hand-wavey analysis)
>     >>> * A superior expo converter by Dave Rossum
>     >>> * More details on the internal workings
>     >>>
>     >>> Direct link:
>     http://www.soundsemiconductor.com/downloads/ssi2164datasheet.pdf
>     >>>
>     >>> Cheers
>     >>> Neil
>     >> --
>     >> --Tim Ressel
>     >> Circuit Abbey
>     >> timr at circuitabbey.com <mailto:timr at circuitabbey.com>
>     >>
>     >> _______________________________________________
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>     -- 
>     --Tim Ressel
>     Circuit Abbey
>     timr at circuitabbey.com <mailto:timr at circuitabbey.com>
>
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>
>
> -- 
> Quincas Moreira
> Synth Diy Guy
>
>
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-- 
--Tim Ressel
Circuit Abbey
timr at circuitabbey.com

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