Timeline for Replacing aluminum capacitor by tantalum capacitor for accelerometer bulk bypass
Current License: CC BY-SA 3.0
3 events
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| Apr 29, 2017 at 13:32 | comment | added | Olin Lathrop | @Paul: This answer is misleading in that it picks a particularly extreme part and implies it serves as a general example. Capacitance decrease with voltage certainly exists, but there are also many cheaply available parts that react much better than what is shown. This is not common to all ceramics or SMD capacitors. It is a function of the ceramic. For high-volume non-exact use, like bypassing, it can be worth the little extra savings to use cheap ceramics. Better ceramics aren't that much more money, and you can also compensate by using a higher starting capacitance in some cases. | |
| Jan 1, 2017 at 14:29 | comment | added | Paul Uszak | Your graph is absolutely horrible! I'm looking to bypass an op amp at +/- 15V. A typical by passer is 100nF. Is this bias derating common to all ceramics, or just your small SMT type? Do we just have to use 100V rated ceramics for old level voltages instead? | |
| Jun 8, 2016 at 14:11 | history | answered | user2943160 | CC BY-SA 3.0 |