Datasheet > 0805CG181C9B300

0805CG181C9B300

更新时间： 2023-01-02 20:50:33

品牌	Logo	应用领域
国巨 - YAGEO		/
页数	文件大小	规格书
15页	867K
描述
Ceramic Capacitor, Multilayer, Ceramic, 50V, 0.1389% +Tol, 0.1389% -Tol, C0G, 30ppm/Cel TC, 0.00018uF, Surface Mount, 0805, CHIP

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0805CG181C9B300 数据手册

Phycomp

Product specification

Surface mount ceramic

multilayer capacitors

Class 1, NP0 50/100/200/500 V

Noble Metal Electrode

MLB198

500

handbook, halfpage

ESR

(mΩ)

300

200

10 pF

47 pF

100

ESR

100 pF

MEA609

220 pF

100

200

300

500

f (MHz)

C = capacitance.

ESR = equivalent series resistance which is determined by the

energy dissipation mechanisms (in the dielectric material as well

as in the electrodes).

Case size 1206.

High voltage 500 V.

L = equivalent series self-inductance.

Fig.15 Typicalequivalent series resistance as

a function of frequency.

Fig.16 Equivalent series representation of a CMC.

HIGH FREQUENCY BEHAVIOUR OF CERAMIC

MULTILAYER CAPACITORS

Because of the inductance L, associated with the CMC,

there will be a frequency at which the inductive reactance

will be equal to the reactance of the capacitor.

Ceramic multilayer capacitors (CMC) are suitable for use

at high frequencies. At frequencies below the series

resonance frequency, the CMC can be represented by an

equivalent circuit as shown in Fig.16.

This is known as the series resonance frequency (SRF)

and is given by:

SRF =

-------------------

2π LC

In general, the quantities C, ESR and L are frequency

dependent. For most applications, C and L can be

regarded as frequency independent below 1 GHz.

At the SRF, the CMC will appear as a small resistor.

The transmission loss through the CMC at this series

resonance frequency will be low.

The equivalent series self-inductance L is:

• Independent of the dielectric material.

Using the values of C, L = 1 nH and the ESR at a specific

frequency (f), two often used quantities can be derived.

• Dependent on the size of the capacitor, it increases with

increasing length and decreases with increasing width

or thickness of the product.

The impedance (Z) is given by:

1 – (2πf)²LC

Z =

+ ESR

------------------------------------

• The value of L is approximately:

– 0.6 nH for case size 0603

2jπfC

The quality factor (Q) is given by:

– 1 nH for case sizes 0805, 1206 and 1210

– 1.5 nH for case sizes 1812.

1 – (2πf)²LC

Q =

--------------------------------------

2πfESRC

These figures are accurate to within 20%.

2000 Sep 11

1...12 13 1415

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