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Address: B1309 Xin Zhong Fa Building Zhongguancun Street, No. 32 Haidian Beijing
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电议
HCPL-4200-000E 光电耦合 20 mA 电流环路接收器
HCPL-4200 为专门面向使用 20 mA 电流环路设备设计的 4 到 20mA 接收器。通常,20mA 电流环路系统发射 20 mA 环路电流 (MARK) 来标志逻辑高电平,同时允许不超过几毫安的环路电流 (SPACE) 来标志逻辑低电平。
由 20 mA 信号环路提供的信号通过光电耦合到逻辑输出可以切断接地环路并带来超高共模抑制能力。通过提供电流环路高逻辑状态和低逻辑状态的保证阀值,带来 LSTTL、TTL 或 CMOS 兼容逻辑接口,并提供保证共模抑制能力。 电流环路端的缓冲电路具有 0.8mA 滞后,可以提高对共模和差分模式噪声的抗扰度,缓冲器并提供有考虑 LED 光输出劣化的控制 LED 驱动电流,内部屏蔽可保证 1000V/ms 的共模瞬变抗扰度。
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