Linked Questions

304
votes
6answers
393k views

Choosing power supply, how to get the voltage and current ratings?

Power supplies are available in a wide range of voltage and current ratings. If I have a device that has specific voltage and current ratings, how do those relate to the power ratings I need to ...
25
votes
3answers
8k views

Why do we use polarized capacitors?

I want to know if the polarized capacitor has some advantage that they are used in some circuits? For example, in a schematic of the BISS001 PIR controller IC, in some places, a polarized capacitor ...
13
votes
4answers
5k views

Replacing aluminum capacitor by tantalum capacitor for accelerometer bulk bypass

I am currently working on a design which includes the AIS3624DQ accelerometer from ST. In the datasheet, it says (section 4, page 17): "Power supply decoupling capacitors (100 nF ceramic, 10 μF ...
17
votes
4answers
12k 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 ...
12
votes
2answers
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 ...
1
vote
10answers
12k views

Dangers of capacitors blowing up

I was wondering what kind of damage a 350V, 6000uF (link to capacitor) electrolytic capacitor could do. will this kill me if it blew up next to me? I have never blown capacitors before, but I ...
5
votes
4answers
1k views

Why use a tantalum instead of a ceramic capacitor?

On page 72 of the AD7124-4 datasheet it says: Decouple AVDD with a 1 μF tantalum capacitor in parallel with a 0.1 μF capacitor to AVSS on each pin. Why would this capacitor be specified to be a ...
4
votes
3answers
2k views

Really odd capacitor markings

I got some capacitors about two years ago now, which I foolishly removed from their bag, and I quickly forgot their markings. I can't even figure out which kind of capacitor it is. Tantalum seems the ...
2
votes
3answers
3k views

Can you replace electrolytic capacitors with tantalum ones?

Due to size constraints on a custom PCB, I have opted out for using the smallest type of electrolytic capacitors (3 mm diameter.) However, capacitors in such a small diameter are almost impossible to ...
1
vote
1answer
980 views

Maximum allowable ripple current and surge current for tantalum capacitor

I use two 10uF, 20VDC tantalum capacitors in parallel as decoupling capacitors just after the battery connector. At the moment the battery is plugged in, one of the capacitors sometimes burns out (not ...
1
vote
1answer
401 views

What does "Transient Response Recovery" means in the output specification of a AC-DC power supply?

I'm using a AC-DC power supply to provide 24VDC input to a PCB. A 100uF,35V tantalum is used as one of the filter capacitors for the 24V(same from supply) input of DC-DC regulator on PCB. In some ...
0
votes
1answer
508 views

Aluminum electrolytic vs. tantalum capacitor for buffering SAR ADC Ref input

I want to use the ADS8317 16-Bit SAR A/D converter and have read through the datasheet. In there, ti recommend using a low ESR 47µF tantalum capacitor to buffer the reference input. Now, my reference ...
4
votes
3answers
269 views

DAC multiplexer glitch

UPDATE 20th May: Swapped the analog output regulator for an AZ1117-EH based on Peter Smith's suggestion, removed C1306, so now the 3.3VA output should be ok at least based on the datasheet. However, ...
0
votes
3answers
273 views

50V Ceramic Capacitor for 36V Vehicle Battery

In my vehicle Battery powered system which can vary from 12V to 36V , I want to use a Capacitor of minimum 10uF on the input. I have few doubts :- Which is best for 10uF value @ 36V - Ceramic/...
0
votes
1answer
105 views

Capacitor Differences

Why would some circuit designers prefer a tantalum or a ceramic capacitor instead of the popular electrolytic ones? In circuit schematics, all capacitors are all the same. So what factors will be ...

15 30 50 per page