Monolithic Ceramic Capacitors (commonly known as Chip Capacitors) is the relatively large amount of common components, production companies on the patch AVX capacitor speaking with NPO, X7R, Z5U, Y5V different specifications, different specifications have different purposes. Next, we used only the NPO, X7R, Z5U and Y5V to tell us about their performance and applications, and procurement matters should pay Film capacitor attention to the orders to cause everyone's attention. Different companies for the different properties of capacitors may have different names, we quote here is the naming AVX Corporation, the other company's products please refer to the company's product manual.
NPO, X7R, Z5U and Y5V the main difference between them is their different filling medium. In the same volume filled with media because of the different composition of the different capacity capacitor, the capacitor and brought the dielectric loss, capacity stability is different. Therefore, the use of capacitors in the circuit shall be based on the capacitor to choose different roles in different capacitors.
A NPO capacitors
NPO is the most commonly used with a temperature compensation of monolithic ceramic capacitors. Its medium is filled by rubidium, and some other rare samarium oxide formed.
NPO is the capacitance Film capacitor capacitors and dielectric loss one of the most stable capacitors. In the temperature from -55 ° C to +125 ℃ capacity change is 0 ± 30ppm / ° C, with the frequency capacitance changes of less than ± 0.3 Δ C. NPO capacitance drift or lagging less than ± 0.05%, the relative greater than ± 2% of the thin film capacitor is negligible dollars. The typical service life of relative changes in the capacity of less than ± 0.1%. NPO capacitors with different forms of packaging capacity and its dielectric loss, the frequency changes with different characteristics, the package size than the small package size of the frequency characteristics good. The following table gives the NPO capacitor capacity range can be selected.
Packaging, DC = 50V DC = 100V
0805 0.5 --- 1000pF 0.5 --- 820pF
1206 0.5 --- 1200pF 0.5 --- 1800pF
1210 560 --- 5600pF 560 --- 2700pF
2225 1000pF 0.033 µ F 1000pF --- --- 0.018 µ F
NPO capacitors suitable for oscillators, resonators the trough Road capacitance, and high-frequency circuits in the coupling capacitance.
Second X7R capacitors
X7R capacitors known as a temperature-stable ceramic capacitors. When the temperature is -55 ° C to +125 ℃ changes in its capacity as 15%, must be noted that at this time capacitor capacity change is nonlinear.
X7R capacitors in the capacity of different voltage and frequency conditions Film capacitor are different, it changes with time and change, changes approximately every 10 1% Δ C, showed 10 changes by about 5%.
X7R capacitors weak claims mainly used in industrial applications, but when the voltage changes its capacity change is acceptable conditions. Its main feature is the size of the same capacitance that can be done relatively large. The following table gives the X7R capacitors can select the capacity range.
Packaging, DC = 50V DC = 100V
0805 330pF --- 0.056 μ F 330pF --- 0.012 μ F
1206 1000pF 0.15 µ F 1000pF --- --- 0.047 µ F
1210 1000pF --- --- 0.22 µ F 1000pF 0.1 µ F
2225 0.01 µ F --- 1 µ F 0.01 µ F --- 0.56 µ F
Three Z5U capacitors
Z5U capacitors known as "universal" monolithic ceramic capacitors. Here Film capacitor is the first to consider the use of temperature range, Z5U capacitor it is mainly the small size and low cost. For the three monolithic ceramic capacitors with the same volume that under Z5U electric capacitors have the greatest capacity. But its electricity capacity by the environment and a greater impact on working conditions, it could reach the maximum rate of aging of every 10 dropped 5%.
Although its capacity instability Because of its small size, equivalent series inductance (ESL) and equivalent series resistance (ESR) low, good frequency response, so that it has a wide application Film capacitor range. Especially in the decoupling circuit applications. The following table gives the Z5U capacitor value range
