Questions tagged [ceramic]
A kind of capacitor where ceramic material acts as a dielectric. They have less volumetric efficiency than electrolytic capacitors.
26
questions
19
votes
4
answers
7k
views
Will a 0402 0.01 µF ceramic capacitor next to a 0402 0.1 µF ceramic capacitor have any power decoupling benefits?
I always understood that the point of using smaller capacitors in parallel was to provide low impedance at higher frequencies than the bigger capacitors, because the higher capacitance capacitors '...
- 8,519
13
votes
2
answers
51k
views
Ceramic capacitors: how to read 3-digit plus 1-letter markings?
It seems that reading a ceramic capacitor value out of its written values is harder than decoding an Enigma machine.
I wonder if experienced users here does have a trick to quickly figure out these ...
- 3,284
9
votes
1
answer
15k
views
How to derate a ceramic capacitor for DC bias
I understand that the capacitance of a ceramic cap is very dependent on the DC bias applied to the terminals. At rated voltage, I've measured a decrease of up to 70%, and I've heard it can go higher. ...
- 739
7
votes
2
answers
19k
views
Capacitance vs. Frequency Graph of ceramic capacitors
I'm looking at ceramic capacitors on TDK and I see this graph
Does this mean above several hundred kiloHertz - or wherever the graph stops - that the capacitor no longer functions probably ?
- 1,197
12
votes
2
answers
9k
views
Tantalum capacitors vs. ceramic capacitors
I have a negative LDO (-5V from -5.5V to -10V) which requires a tantalum or aluminum capacitor. I'm wondering why it can't use a ceramic capacitor? Is there any specific reason for this?
Regulator is ...
- 31.9k
2
votes
2
answers
2k
views
Capacitors: voltage-dependent capacitance?
While playing around with a capacitive power supplies, I observed some very weird behavior when passing a 60Hz sinusoidal current through a 1000V disk ceramic capacitor. The voltage curve was very ...
- 1,563
34
votes
4
answers
121k
views
Ceramic capacitors: how to read 2-digit markings?
Related question: Ceramic capacitors: how to read 3-digit markings?
I have some ceramic capacitors with a 2-digit marking. How to read them? Do the colored markings at the top mean anything?
Image ...
- 783
17
votes
4
answers
13k
views
Ceramic (MLCC) versus Tantalum capacitors
From the perspective of an electronics designer, but also taking into account price/cost and social considerations (see Coltan mining and ethics link below), I tend to avoid Tantalum capacitors under ...
- 2,102
16
votes
1
answer
12k
views
Why do ceramic insulators have a stacked disc structure?
I've seen these stacked-disc structures on high voltage power lines everywhere. I could not find any information regarding this particular shape, though.
From what I've noticed, high voltage ceramic ...
8
votes
1
answer
601
views
Ceramic caps and applied voltage
I'm using a 22u 6.3V X5R 0805 ceramic capacitor to filter out a 3.3V supply (for a buck converter.) I've heard that applied voltage has an effect on the capacitance of certain ceramic caps; a higher ...
- 31.9k
22
votes
6
answers
6k
views
Why recommend tantalum over ceramic capacitor for voltage regulator? [duplicate]
The LM1117 voltage regulator datasheet recommends using tantalum capacitors on the input and output. What is the reason for this? What advantage does tantalum have over a ceramic capacitor?
A 10μF ...
- 863
14
votes
4
answers
8k
views
SMD ceramic capacitor 0805 vs 1206
I don't know what size to choose. Does SMD capacitor package matter in my case, Is it wrong to choose 0805 package?
8
votes
2
answers
4k
views
How to be sure that a ceramic capacitor can manage a RMS current?
I'm in the middle of a design and I need a capacitor of:
10µF
Rated at 10V
Has to handle a ripple current of 250mA RMS, at 400kHz
Most electrolytic capacitor data sheets give a maximum RMS value for ...
- 1,133
8
votes
2
answers
6k
views
Which type of 100nF capacitor is best for 78xx regulator output?
I use 78L12 or similar voltage regulators in a few power supplies. I use them in their basic setup, see the picture:
This diagram is common for all 78xx and 78Lxx regulators. It says that output ...
- 3,001
6
votes
1
answer
1k
views
SMD ceramic capacitors producing ticking sound?
I've soldered a couple of SMD capacitors to pads which were not intended to host them. As a result there's a bit of space between the PCB and the capacitors. I have a signal on the capacitors as shown ...
- 23.5k