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AN4310 Datasheet(PDF) 5 Page - STMicroelectronics |
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AN4310 Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 8 page DocID024789 Rev 2 5/8 AN4310 Capacitor comparison 8 3 Capacitor comparison Table 2 compares the most important characteristics that need to be reviewed when selecting a CS capacitor. The PPS (polyphenylene sulfide) dielectric and the NPO ceramic capacitors performs excellently in all categories. The PET (metalized polyester) and the PEN (metalized polyphenylene naphthalate) capacitors also perform quite well and can be used in all touch sensing applications. Tantalum capacitors should be avoided as they have a very high dissipation factor and a high effective series resistance (ESR). X7R ceramic capacitors can be used in certain applications when a less sensitive level is required. Table 2. Characteristics of film SMD capacitors PET PEN PPS NPO X7R Tantalum Operating temperature (°C) −55 to 125 −55 to 125 −55 to 140 −55 to 125 −55 to 125 −55 to 125 ΔC/C with temperature (°C) ±5 ±5 ±1.5 ±1 ±1 ±10 Dissipation factor (%) 1 kHz 0.8 0.8 0.2 0.1 2.5 8 10 kHz 1.5 1.5 0.25 0.1 - - 100 kHz 3.0 3.0 0.5 0.1 - - Dielectric absorption (%) 0.5 1 0.05 0.6 2.5 - ESR Low Low Very low Low Moderate to high High Reliability High High High High Moderate Low |
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Similar Description - AN4310 |
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