• RE: Slew rate VS input level (ad8641?)

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
  • 使用光电二极管跨阻放大,后级输出是正弦信号,正常吗?

    二极管滨松的S2386-5K,运放AD8615(后来又试了AD8641),负电源接了-0.3V。
    使用光电二极管跨阻放大,光电二极管没有偏置,使用光伏模式,但后级输出是正弦波信号,参考了ADI官方的一些电路,不知道怎么把正弦信号转成有效稳定的直流信号

  • Noise Calculation in MS-2022

    Hi 

    how to get the below value from AD8641? from datasheet, In should be 0.5fA, right?

    another question is about 

    in calculation, BW is equal to 10Kz. but in application MT-049, BW = 1.57*FCL,  FCL = GBW / NoiseGain, this is my understanding,

    so please…

  • RE: REF02: TEMP pin

    Hi Mr. K,

    I just want to clarify that bias current is the amount of current that the input circuitry of op amp requires for its proper operation. If the bias current of AD8641 is 260pA(max), then it is also the maximum current that the AD8641 can be…

  • MS-2022 Noise Calculation for Proper Signal Conditioning

    Hi,

    I am not sure if I am posting at the right place, but it is about following:   

    The application note MS-2022 has more mistakes, it is a quite confusing/frustrating and it hasn't been corrected or revised since 2011!

    http://www.analog.com/media/en…

  • RE: AD8627是五脚单运放,使用温度只有80度,有没有温度是125度的

    封装也要和AD8627相同吗?可以看一下AD8641.

    如果没有封装限制的话,还可以看一下ADA4000-1,ADA4627-1,AD8510。

  • RE: 签个到,送您好礼啦!(获奖名单已公布)

    南京,雨花台区,医疗器械,关注运放AD8641

  • RE: AD8066用哪个芯片可以替换

    非常感谢你的帮助!我已经选择了AD8641,具体效果要看实际应用了。

  • RE: 印象•ADI放大器——有奖互动,说出你的ADI放大器印象

    年初做微弱信号放大项目时考虑过OP选型问题。当时涉及到:

    首先对于微弱信号处理,得选择低偏置电流,输入阻抗大的OPADI最好的用于光电转换上的芯片是AD549LIb=60fA),根据项目的需求,对于uA级的信号,理论上OP的偏置电流至少要nA级别,最好是pA级别。这种OP ADI有很多种,FET输入级基本都在这个级别:如AD8627AD8641等等。最终选择了AD8627

    此外,注意使用过程中的降噪处理,比如反馈电阻上加反馈电容(很有必要),可降低电路的高频噪声增益。第二种方法是用复合放大器进行降噪处理…

  • RE: Low input bias current. Which one to choose?

    Some of the other choices are:

    ADA4610-2 if you need a dual

    AD820, AD822

    AD8641, AD8642

    AD8610, AD8620

    AD8510, and ADA4610-2

    All of these are stable at gain of 1 for your voltage follower