[time-nuts] GC-1000 Clock Cap Choice?
Dr. Frank Stellmach
drfrank.stellmach at freenet.de
Sun Jan 16 17:57:27 EST 2011
>Can you clarify one thing for me: When I studied datasheets for these
> it looked like they drop 50% of their capacitance at a DC voltage
> of 10-20V.
> Doesn't that make them a so-so bargain for power supply bulk capacitance ?
Pls. check the spec for dielectric material.
X5R is automotive grade, interior applications (up to 85°C) ; X7R would be engine applications (>= 125°C).
Those ceramics don't have such high detoriation of cap vs. T and V.
For example, Y5V is commercial application range and might have such problems.
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