Re: [CAD_CAM_EDM_DRO] tantalum caps

Mariss Freimanis wrote:

>
> I should know; originally the G201 and G320 were specified with 1206
> case size tantalums (4.7uF/16V). When the price rose from $0.15 to
> $1.25 per cap in 10K quantities, something had to be done. We tested
> and qualified multilayer ceramic caps, same case size and ratings.
> The price in similar quantities is less the what the tantalums
> originally cost.
>
> Their only drawback is the +80% -20% tolerance over temperature for
> the Y5V dielectric, making them unsuitable for precision timing
> circuits.

Well, you have the choice of C0G for tightest temperature coefficient,
but only in small capacitance values, Z5U for a pretty low temp coeff
on larger values, and the Y5V for the greatest capacitance for decoupling
use only.

Jon