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参数资料
| 型号： | 04023J2R9ABSTR |
| 厂商： | AVX Corporation |
| 文件页数： | 23/26页 |
| 文件大小： | 0K |
| 描述： | CAP THIN FILM 2.9PF 25V 0402 |
| 标准包装： | 1 |
| 系列： | Accu-P® |
| 电容： | 2.9pF |
| 电压 - 额定： | 25V |
| 容差： | ±0.05pF |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 0402（1005 公制） |
| 工作温度： | -55°C ~ 125°C |
| 特点： | RF，高 Q 值，低损耗 |
| 包装： | 剪切带 (CT) |
| 尺寸/尺寸： | 0.039" L x 0.022" W（1.00mm x 0.55mm） |
| 高度 - 座高（最大）： | 0.020"（0.50mm） |
| 其它名称： | 478-6775-1 |
Accu-P ?
Performance Characteristics RF Power Applications
RF POWER APPLICATIONS
In RF power applications capacitor losses generate heat. Two
factors of particular importance to designers are:
ESR and therefore RF heating. Values of ESR for
Accu-P ? capacitors are significantly less than those of
ceramic MLC components currently available.
? Minimizing the generation of heat.
? Dissipating heat as efficiently as possible.
CAPACITOR HEATING
? The major source of heat generation in a capacitor in RF
power applications is a function of RF current (I) and ESR,
from the relationship:
Power dissipation = I 2RMS x ESR
? Accu-P ? capacitors are specially designed to minimize
HEAT DISSIPATION
? Heat is dissipated from a capacitor through a variety of
paths, but the key factor in the removal of heat is the
thermal conductivity of the capacitor material.
? The higher the thermal conductivity of the capacitor, the
more rapidly heat will be dissipated.
? The table below illustrates the importance of thermal
conductivity to the performance of Accu-P ? in power
applications.
1
PRODUCT
Accu-P ?
Microwave MLC
Power Handling
MATERIAL
Alumina
Magnesium Titanate
THERMAL CONDUCTIVITY W/mK
18.9
6.0
8
Amps
Accu-P ? 10pF
Data used in calculating the graph:
Thermal impedance of capacitors:
1210
6
1210
0402 17°C/W
0603 12°C/W
4
0805
0805
0603
0805 6.5°C/W
1210 5°C/W
Thermal impedance measured using RF generator,
2
0402
amplifier and strip-line transformer.
ESR of capacitors measured on Boonton 34A
0
0
200
400
600
800 1000 1200 1400MHz
THERMAL IMPEDANCE
Thermal impedance of Accu-P ? chips is shown below com-
pared with the thermal impedance of Microwave MLC’s.
The thermal impedance expresses the temperature difference
in °C between chip center and termination caused by
a power dissipation of 1 watt in the chip. It is expressed in
°C/W.
CAPACITOR TYPE
Accu-P ?
Microwave MLC
CHIP SIZE
0805
1210
0505
THERMAL IMPEDANCE (°C/W)
6.5
5
12
ADVANTAGES OF ACCU-P ?
IN RF POWER CIRCUITS
The optimized design of Accu-P ? offers the designer of RF
power circuits the following advantages:
? Reduced power losses due to the inherently low ESR of
Accu-P ? .
? Increased power dissipation due to the high thermal
conductivity of Accu-P ? .
? THE ONLY TRUE TEST OF A CAPACITOR IN ANY PARTICULAR
APPLICATION IS ITS PERFORMANCE UNDER OPERATING
CONDITIONS IN THE ACTUAL CIRCUIT.
1210
7.5
PRACTICAL APPLICATION
IN RF POWER CIRCUITS
? There is a wide variety of different experimental methods
for measuring the power handling performance of a
capacitor in RF power circuits. Each method has its
own problems and few of them exactly reproduce the
conditions present in “real” circuit applications.
? Similarly, there is a very wide range of different circuit appli-
cations, all with their unique characteristics and operating
conditions which cannot possibly be covered by such
“theoretical” testing.
27
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 04023J2R9ABSTR/5K | 制造商:AVX Corporation 功能描述:CAP THIN FILM 2.9PF 25V 0402 |
| 04023J2R9BBSTR | 功能描述:多层陶瓷电容器MLCC - SMD/SMT 25volts 2.9pF RoHS:否 制造商:American Technical Ceramics (ATC) 电容:10 pF 容差:1 % 电压额定值:250 V 温度系数/代码:C0G (NP0) 外壳代码 - in:0505 外壳代码 - mm:1414 工作温度范围:- 55 C to + 125 C 产品:Low ESR MLCCs 封装:Reel |
| 04023J2R9BBSTR/500 | 制造商:AVX Corporation 功能描述:CAP THIN FILM 2.9PF 25V 0402 |
| 04023J2R9BBSTR\\500 | 制造商:AVX Corporation 功能描述:CAP 2.9PF 25VDC C0G 0.1PF SMD 0402 - Tape and Reel |
| 04023J2R9BBSTR\500 | 功能描述:薄膜电容器 25volts 2.9pF RoHS:否 制造商:Cornell Dubilier 产品类型: 电介质:Polyester 电容:0.047 uF 容差:10 % 电压额定值:100 V 系列:225P 工作温度范围:- 55 C to + 85 C 端接类型:Radial 引线间隔:9.5 mm |
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