ADI ADG7421F低压双路单刀单掷(SPST)低导通开关解决方案  

出　　处：《世界电子元器件》2022年第2期38-42,共5页Global Electronics China

摘　　要：ADI公司的ADG7421F是低电压,双单刀单掷(SPST)低导通电阻开关,在源极引脚上具有过压保护,掉电保护和过压检测功能.当没有电源时,开关保持关闭状态,开关输入为高阻抗.上电时,如果任何一个Sx引脚上的模拟输入信号电平超过VDD或VSS的阈值电压VT,该开关自动关闭,数字FF(故障标志)引脚下降到逻辑低电平,以指示故障.在通电和断电条件下,相对接地电压高达+60 V或-60 V的输入信号电平都将被屏蔽.The ADG7421F is a low voltage,dual single-pole/single-throw(SPST),low on-resistance switch that features overvoltage protection,power-off protection,and overvoltage detection on the source pins.When no power supplies are present,the switch remains in the off condition,and the switch inputs are high impedance.When powered,if the analog input signal levels on the Sx pins exceed VDD or VSS by a threshold voltage,VT,the switch automatically turns off and the digital FF(fault flag)pin drops to a logic low to indicate a fault.

关 键 词：高阻抗 信号电平 过压保护 关闭状态 掉电保护 检测功能 低导通电阻 模拟输入 

分 类 号：TM564[电气工程—电器]