[sdiy] BA6110's

[Amos]

Ah-so... my original, off-list reply was correct, and then the
over-enthusiastic public reply was wrong.  So it goes!  At least I have
learned a thing or two from the subsequent replies...  thanks

On 1/6/06, Oakley Sound <tonyallgood at btinternet.com> wrote:
>
> > BA6110's are used
> > in the majority of 303 clones and were discontinued several years ago.
>
> Well I used them in the Oakley TB3030, my own clone of the sound engine,
> but this is the only one I know of. I got the tip of trying out the Rohm
> device originally from Colin Fraser.
>
> But as I have said before, the BA6110 is not a drop in replacement since
> the IC pins do different things. Also, the Iabc pin sits 1.2V above the
> negative rail unlike the BA662 which sits at 0.6V. This makes a lot of
> difference to the TB303 as it happens.
>
> The TB3030 had two different layouts to cope with the differences
> between the 662 and 6110. The xobox does something similar I believe and
> uses some current mirror thingy to do the Iabc drive correction. I
> simply used an extra resistor.
>
> I have noticed that some Analogue Solution's Roland clone stuff has the
> BA662 replaced with a BA6110.
>
> That said the BA6110 is an excellent device. Low offset, high Gm and
> optional linearisation similar to the 3280. Shame it was discontinued.
> It is, however, very easy to kill. More than a mA out of its Iabc pin
> will kill it.
>
> Tony
>
> www.oakleysound.com
>
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