[sdiy] Best AVAILABLE OTA for building new designs?

[Joan Touzet]

On 2024-08-08 14:08, Dan Snazelle via Synth-diy wrote:
> imagine someone asked you to make some new synth modules.
> then imagine that the last time you did so in any quantity above 
> one---  it was 2017.
>
>
> I am trying to get a handle on what the parts landscape is like now 
> for cost-effective CV control. Back in 2017 the lm13700 was really the 
> only available OTA . I was just starting to work with the ssm2164 at 
> the time but never used it extensively.


It may just be my opinion, but...why /not/ go with what you know?


LM13700(M) is still in production by TI and not expensive in quantity -- 
cheaper than the other options you mention. TI themselves will even sell 
them to you, e.g. 100 @ US$0.741 each. Coolaudio (Behringer)'s V13700 is 
about about the same price, ~US$0.92. Compare with SSI2140 at e.g. $2.79 
each in that quantity.


Since this is DFM, I'm going to assume SOIC / SSOP / etc. vs. DIP is not 
an obstruction for you.


Can't go wrong with the SSI2140 though, or the V2044A, or even the 
AS2164/33x0 devices -- assuming the increased BOM cost is justified by 
the advantages of the new devices, and you're not trying to colour 
outside the lines that they draw.
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