{"id":632,"date":"2010-06-17T22:24:29","date_gmt":"2010-06-17T22:24:29","guid":{"rendered":"https:\/\/ibex.tech\/resources\/?p=632"},"modified":"2022-02-18T15:05:18","modified_gmt":"2022-02-18T15:05:18","slug":"ceramic","status":"publish","type":"post","link":"https:\/\/ibex.tech\/resources\/geek-area\/electronics\/capacitors\/ceramic","title":{"rendered":"Ceramic Capacitors"},"content":{"rendered":"

\nMultilayer ceramincs are great for applications where voltage is constant (ie. you are smoothing off a voltage).  However they are not good for use inline for AC voltages (i.e. audio and AC signal filters).  The reason is that ceramic capacitors will give a piezo electric effect to an AC signal, which causes noise.  For audio use a Poly of some type (Polypropelene is best for audio signal pass through).\n<\/p>\n

\nX7R, X5R
\n<\/h4>\n

\nBetter than Z5U and Y5V.  Typically maintain a capacitance range within +-20% of nominal over the full operating voltage and temperature ranges.  As a result they are typically larger and more expensive than Z5U and Y5U types.\n<\/p>\n

\nZ5U, Y5V
\n<\/h4>\n

\nCapacitance drops off severely with applied voltage.  A typical Z5U or Y5V capacitor can loose 60% of its rated capacitance with half the rated voltage applied to it.\n<\/p>\n

\nZ5U and Y5V also exhibit a severe temperature effect loosing more than 50% of nominal capacitance and the top and bottom ends of the temperature range.\n<\/p>\n

\nCeramic Capacitor Naming
\n<\/h4>\n

\nClass 1\n<\/p>\n

\nNPO, COG\n<\/p>\n

\nMost stable\n<\/p>\n

\nClass 2\n<\/p>\n

\nLess stable\n<\/p>\n

\n1st Character – Low Temperature\n<\/p>\n

\nX = -55ºC\n<\/p>\n

\nY = -30ºC\n<\/p>\n

\nZ = +10ºC\n<\/p>\n

\n2nd Character – High Temperature\n<\/p>\n

\n4 = +65ºC\n<\/p>\n

\n5 = +85ºC\n<\/p>\n

\n6 = +105ºC\n<\/p>\n

\n7 = +125ºC\n<\/p>\n

\n8 = +150ºC\n<\/p>\n

\n9 = +200ºC\n<\/p>\n

\n3rd Character – Tolerance\n<\/p>\n

\nP = +\/-10%\n<\/p>\n

\nR = +\/-15%\n<\/p>\n

\nS = +\/-22%\n<\/p>\n

\nT = +22 \/ -33%\n<\/p>\n

\nU = +22 \/ -56%\n<\/p>\n

\nV = +22 \/ -82%\n<\/p>\n

\nCapacitance Variation With Voltage
\n<\/h4>\n

\nIn addition to temperature tolerance, the effective capacitance of large value ceramic capacitors can vary substantially based on the applied DC voltage. This effect can be very significant, and is often overlooked or not documented well.\n<\/p>\n

\n\"capacitance_vs_voltage\"<\/a>\n<\/p>\n

\nWhen selecting a ceramic capacitor where this is a concern (e.g. for a voltage regulator) select a high-voltage rating so that the operating voltage is a small percentage of the maximum rated capacitor voltage. E.g. for a 1.8V voltage regulator in a IC, select say a 16V ceramic capacitor.\n<\/p>\n

\n \n<\/p>\n

\n \n<\/p>\n

\n <\/p>\n","protected":false},"excerpt":{"rendered":"

Multilayer ceramincs are great for applications where voltage is constant (ie. you are smoothing off a voltage).  However they are not good for use inline for AC voltages (i.e. audio and AC signal filters).  The reason is that ceramic capacitors will give a piezo electric effect to an AC signal, which causes noise.  For audio […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[30],"tags":[],"class_list":["post-632","post","type-post","status-publish","format-standard","hentry","category-capacitors"],"_links":{"self":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts\/632","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/comments?post=632"}],"version-history":[{"count":7,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts\/632\/revisions"}],"predecessor-version":[{"id":1472,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts\/632\/revisions\/1472"}],"wp:attachment":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/media?parent=632"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/categories?post=632"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/tags?post=632"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}