• RE: Direction of AD790A bias current

    FormerMember
    FormerMember

    Nikkee,

      Most data sheets for op amps, comparators, etc. for offset voltage, input bias current, etc. simply

    have a number with no + or - sign.  For offset voltage, 1 mV means +/-1 mV.  For bias current,

    IF there is only one input diff pair, the current…

  • op291放大器过热,引脚焊锡溶化,求工程师分析解答

         在应用中使用op291GSZ做放大用,使用中发现,一开始在高温环境下(110℃)个别放大器自身会有过热现象,引脚的焊锡都融化了,估计温度在260℃以上。后来在常温下调试,这种情况也会发生。分析了很多原因,也采取了很多措施,问题依然存在,百思不得其解。希望论坛上工程师能帮助分析这种过热现象可能出现的原因,及采取的应对措施,非常感谢!

  • RE: input voltage

    Hi Harry,

    Thanks for your comment.

    I tried Shottky diodes and found they have large leakage current.

    I wonder why data sheet has an example exceeding the absolute maximum ratings.

    Anyway, I choose OP291 instead of AD8542.

    It will be fine except that the…

  • 问题: [征文]关于ADUC814线性度的几点问题【问题解决】

    为了更好的说明问题,下面摘取了21组采集电压对比

     

    实际电压 被测电压 偏差
    2985 2990 -5
    2925 2931 -6
    2836 2842 -6
    2738 2731 7
    2656 2664
  • TAGS LIST: Amplifiers

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