X5R and X7R capacitors exhibit moderate capacitance changes with temperature variations and are frequently used in many types of applications, such as coupling and decoupling capacitors.
They vave a high capacitance per volume unit and is mainly suitable for less sensitive circuits. Its thermal stability is approximately ±15% within the temperature range. For X5R and X7R the temperature range differs: X5R -55 to +85 °C and X7R: -55 to +120 °C.
Definitions:
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Coupling capacitor: Used in series with the signal to block DC while allowing AC to pass.
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Decoupling capacitor: Connected between supply voltage and ground to filter disturbances and stabilize the voltage level.
| Property | C0G/NP0 | X7R | Y5V |
|---|---|---|---|
| Capacitance stability | Very high | Moderate | Low |
| Temperature range (°C) | –55 to +125 | –55 to +125 | –30 to +85 |
| Capacitance variation with temperature | ±0–1% | ±15% | +22/-82% |
| Capacitance per volume | Low | High | Very high |
| Suitable for RF applications | Yes | No | No |
| Cost | High | Medium | Low |
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