I checked the datasheet for the 10µF 0805 MLCC I'm using, and there is nothing about capacitance vs. voltage
This is a very important point, so I will repeat it. A vendor can call a capacitor X7R (or X5R or any other type) as long as it meets the temperature coefficient specs, regardless of how bad the voltage coefficient is.The larger lesson here, as you may have surmised, is "read the data sheet," every time, no exceptions. Ask for detailed data when the data sheet does not contain sufficient information. Remember too that the ceramic capacitor type designations, such as X7R X5R, and Y5V, imply nothing about voltage coefficients. Engineers must check the data to know, really know, how a specific capacitor will perform under voltage.
Quote from: Jack Christensen on Dec 16, 2012, 02:01 amI checked the datasheet for the 10µF 0805 MLCC I'm using, and there is nothing about capacitance vs. voltage That why the article stated you must seek out the 'detailed information' that would contain information on voltage variation.
Yeah, saw that, thought I'd check a few. Didn't find any capacitance vs. voltage info in datasheets from several manufacturers. Sounds like information that is only divulged on request. I'd say this is a dirty little secret of the MLCC manufacturers.
I'd say this is a dirty little secret of the MLCC manufacturers.