• What is the input impedance of AD8609?

    Planning to use AD8609 for pH application, which needs an amplifier with very high input impedance and low bias current. Couldn't find the impedance information in AD8609 datasheet.

  • AD8235

    Figure 44 of the AD8235 Data sheet shows the device paired with AD8609 in a hi-pass configuration with break at 0.3 Hz.  The AD8609 has very high voltage noise at this frequency.  Fundamental of Heart Beat is about 1 Hz with content to about 60 Hz.

    As…

  • RE: AD8609 Stability issue

    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,
  • AD8609后缀问题请教

    请问:

    AD8609AR

    AD8609AR-REEL

    AD8609AR-REEL7

    AD8609ARZ

    AD8609ARZ-REEL

    AD8609ARZ-REEL7

    这些不同的后缀都是代表什么意思?

    谢谢

  • AD8609手册里的Voltage Noise Density的数值是指一个运放还是四个运放加在一起这么多?

    AD8609四运放,其手册里的Voltage Noise Density的数值是指一个运放还是四个运放加在一起这么多?

  • ADI运算放大器选型指南

    ADI运算放大器选型指南

  • RE: ADI物联网热点应用Demo show!你最关心的是…(发言有惊喜)

    四个智慧城市DEMO,推荐

    • 户外烟雾环境气体含量监测的物联网应用

    主要产品:精密微控制器ADuCM350、放大器AD8609

    适用于:对工厂、环境与森林进行CO、O3、SO2与NO2等气体的物联网监控应用

    原因:迎合环保概念,可扩展性强,能运用云存储,远程控制,应用广泛。

  • RE: 求一款测量能用于测量1nA电流的运放

    你好,推荐使用AD8603,这款放大器的最大偏置电流及最大输入失调电流分别为1pf0.5pf,可以满足测量1nA电流的需要。其它的放大器还有AD8605AD8607AD8609AD8613AD8615AD8627等也可满足你的应用需求I-V转换电路可以参考本论坛中西安交大知名教授杨建国最新力作——《你好,放大器》(电子书下载地址http://h.analog.com/China_ebook_hello_amp)中的161页运放检测电路方案。

    参考电路图如下:

  • Replacing LMV84x by AD8646/8648 ?

    Hi,

    We are now studying to replace LMV84x on existing system by AD8646 or AD8648, then having questions as follows.

    1) Absolute Maximum Ratings of input voltage at AD8646/8648 is defined as "GND to Vsy".

      I could not find any clear definition…

  • RE: AD 8237 in precision low cost multichannel biological amplifier (ECG, EMG, EEG) circuit - questions.

    Hi Scott (& all)

    I am waiting for your responce. I have updated my schematic. It looks now like this:

    I have been reading a lot about op-amp stability. In Analog Dialogue - Analog Dialogue 38-06, June (2004) - it was written, that capacitance…