... | @@ -59,6 +59,7 @@ |
... | @@ -59,6 +59,7 @@ |
|
|
|
|
|
- [The voltage characteristics of electrostatic capacitance](https://article.murata.com/en-eu/article/voltage-characteristics-of-electrostatic-capacitance)
|
|
- [The voltage characteristics of electrostatic capacitance](https://article.murata.com/en-eu/article/voltage-characteristics-of-electrostatic-capacitance)
|
|
- shows that ceramic capacitors may have much less capacitance than you think: a Y5V type may have only 10% of its rated value when it would have been used at its rated voltage. Also an X5R, when used at 30% of its rated voltage may have 10% less capacitance than you expect. And yes, we have seen an LDO oscillating because of this effect (see [report](https://ohwr.org/project/fmc-adc-100m14b4cha-hw/wikis/fmc-adc-100m-adc_power_noise_measurements)).
|
|
- shows that ceramic capacitors may have much less capacitance than you think: a Y5V type may have only 10% of its rated value when it would have been used at its rated voltage. Also an X5R, when used at 30% of its rated voltage may have 10% less capacitance than you expect. And yes, we have seen an LDO oscillating because of this effect (see [report](https://ohwr.org/project/fmc-adc-100m14b4cha-hw/wikis/fmc-adc-100m-adc_power_noise_measurements)).
|
|
|
|
As a general rule for ceramic capacitors it can be stated that the higher the applied [derating](https://ohwr.org/project/ed/wikis/Capacitor-voltage-rating-analysis-script), the lower is the effect of capacitance degradation.
|
|
- see also this [Ceramic Capacitors FAQ entry](https://www.murata.com/en-eu/support/faqs/capacitor/ceramiccapacitor/char/0005) for a link to a tool from Murata that may help you.
|
|
- see also this [Ceramic Capacitors FAQ entry](https://www.murata.com/en-eu/support/faqs/capacitor/ceramiccapacitor/char/0005) for a link to a tool from Murata that may help you.
|
|
- [Using Decoupling
|
|
- [Using Decoupling
|
|
Capacitors](http://hsi.web.cern.ch/HSI/s-link/devices/g-ldc/decouple.pdf),
|
|
Capacitors](http://hsi.web.cern.ch/HSI/s-link/devices/g-ldc/decouple.pdf),
|
... | | ... | |