[sdiy] non-mechanical switching solutions

[Vladimir Pantelic]

On 27.06.2016 16:15, Pete Hartman wrote:

> First thought: CD4052, but that doesn't work well in practice at all.
> 
> Second thought: DG409, better characteristics, but that still doesn't
> work sufficiently well.  
> 
> Dig around a while for why.... aha, the on resistance for both is
> significant, especially for the capacitive stages of a ladder filter. 
> The DG409 has on the order of 100R - 120R.  Too much, and confirmed to
> be the issue by comparing physical connections with wire to physical
> connections with 100R resistors.

ADG1414, R_on = 9.5R and 8 switches inside one package - but needs SPI
so you need to add a 50¢ uC to control it