表贴电容的分类
表贴电容的分类
class 1-------------[c0g]
–temperature compensating capacitors: have low levels of barium titanate, calcium titanate, and other things added to increase the dielectric constant, or to get a desired temperature slope.
–very low temperature drift ,aging, voltage coefficient, frequency coefficient, leakage, and dissipation factor.
–dielectric absorption is typically low but not usually specified.
–size problem : the voltage breakdown is low
?class 2-------------[x7r]
–based mostly on barium titanate (ba2 tio3
–very poor temperature drift, high voltage-coefficient-of-capacitance and, high voltage-coefficient-of-dissipation factor, high frequency-coefficient-of-capacitance and a significant aging rate {the crystal structure}
?class 3
–used only for dc blocking and p.s. bypassing, and even then, change in capacitance due to aging, temperature coefficient, and voltage coefficient must be taken into account.
–use the lowest k material that you can, and use them at a low percentage of rated voltage.
?class 4 -------------[z5u]
–the barrier-layer or reduced-titanate ceramics.
–low breakdown voltage, high leakage and all-around terrible electrical properties.
–obsolete.
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表贴电容的分类
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class 1-------------[c0g]
–temperature compensating capacitors: have low levels of barium titanate, calcium titanate, and other things added to increase the dielectric constant, or to get a desired temperature slope.
–very low temperature drift ,aging, voltage coefficient, frequency coefficient, leakage, and dissipation factor.
–dielectric absorption is typically low but not usually specified.
–size problem : the voltage breakdown is low
?class 2-------------[x7r]
–based mostly on barium titanate (ba2 tio3
–very poor temperature drift, high voltage-coefficient-of-capacitance and, high voltage-coefficient-of-dissipation factor, high frequency-coefficient-of-capacitance and a significant aging rate {the crystal structure}
?class 3
–used only for dc blocking and p.s. bypassing, and even then, change in capacitance due to aging, temperature coefficient, and voltage coefficient must be taken into account.
–use the lowest k material that you can, and use them at a low percentage of rated voltage.
?class 4 -------------[z5u]
–the barrier-layer or reduced-titanate ceramics.
–low breakdown voltage, high leakage and all-around terrible electrical properties.
–obsolete.
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华为获GTI Awards 2022奖项 中兴通讯专网即服务助力运营商发展
区块链能否解决流量造假的问题
看看Arm与合作伙伴设计了哪些有大脑的智能手机摄像头
北京索爱普天工厂3月底停产,手机生产将转移至泰国,成本降一半
表贴电容的分类
丰田chr最新消息：丰田CHR在日本美国热卖,年底入中国市场,这车一上市又会掀起SUV市场的血雨腥风！
台湾六大电子代工企业2016年第三季度财报汇总
芯片国产之路尽管艰难但势不可挡
苹果或将传统芯片巨头英特尔踢出自己的供应链
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海立与全球知名的汽车零部件供应商马瑞利宣布合资项目达成一致
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