[sdiy] SSI2164 datasheet updated

[Tim Ressel]

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> 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
>>
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-- 
--Tim Ressel
Circuit Abbey
timr at circuitabbey.com