• AD8626 voltage noise issue

    Hi Experts,

    I am testing a circuit that TIA pre-amp used AD8626.

    I used Fig45 of spec page15 topology, and 2 OP are used.

    I used same opto-diodes in the -INA and -INB inputs.

    As I thought, the voltage noise of 2 OP should be same.

    But the test shown…

  • RE: What other Jfet amplifier can replace ADA4610? I cannot find it on supplier sites anymore. Thank you!

    Hi Matei, 

    Do you have a specific step size that you need to work with? The AD8626 seems to have lower slew rate and bandwidth compared to the ADA4610. What is your input and expected output?

    Thanks, 

    Kris

  • RE: hi.in ADI Water Analysis Solution for pH Meters.pdf there is a block in the name of programmable ac current in conductivity meter . i can not understand why there is not a single current source for that

    thanks alot it is absolutely right . i have used ad8626 opamp in my circuit and i got wrong current from +vref and when use -vref.the other task i want to have 1ua current with this circuit . i wanna know your opinion about using r3 about 2 Mohm is this…

  • RE: How to meet high input resistance and input bias current return requirements?

    Hi Emmann,

    I want to measure small DC signal variation on the soil surface. Small

    signal means as low as 10 microvolts. Two special electrodes are

    touching/contacting the soil and the signal occures between them. The

    electrodes are connected to the…

  • RE: AD8627输出震荡

    看不清时间轴，是50Hz工频的？

    正相输入，设计是想做跟随，还是放大的？

    Follower是最容易振荡的，要选用标有“unity gain stable”的OPA的，AD8626 datasheet第一页写了它是的。

    另外，电源供电引脚，有用电解+MLCC的组合了的？

  • RE: Amplifying 40 - 80 uV with DC bias of at least 200 mV.

    Hi Fridrik,

    I am thinking of limiting the gain of the first stage instrumentation amplifier to probably less than 10V/V (enough not to saturate the part by the dc offset)  and followed by high pass or a band pass filter stage to  removes dc effects and t…

  • RE: 分光光度计资料大全

    ADI双光束分光光度计解决方案

    分光光度计最重要的产品特性就是稳定性，包括三个方面的稳定性要求：随时间和温度的漂移是非常重要的考虑因素； 需要低漂移的精确信号链； 双光束架构也是重要因素。

    ADI提供了完整的双光束分光光度计解决方案，详细资料可以下载附件PDF文档。


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  • ad822: Phase reversal (1)

    Q 

    A customer is reporting a behavior of the AD822 as follows:
    If an input gets a voltage level that is above the Vdd, the output is going low
    instead of staying at Vdd potential.

    ° Would it be possible to get some infos on the background…

  • RE: pH计（酸度计）和电导率仪那些事

    PH计设计的主要考虑因素有： 稳定性、分辨率、低功耗。结合上面提供的咱们ADI的解决方案，看看如何满足这些需求：

    多数pH计提供3.位的分辨率，这意味着16位Σ-Δ ADC即足够。某些实验室pH计的分辨率可能高达5.位，此时应当使用AD7793等。24位Σ-Δ ADC和低闪烁噪声放大器ADA4505-2/AD8626。

    仪器仪表的一大趋势是小型化和便携化，这对低功耗设计带来挑战。上表中每个类别下的产品中都有低功耗器件。例如：ADA4505-2/AD8626、ADR291、AD7792/3、ADuCM361…

  • 运算放大器输出相位反转和输入过压保护

    运算放大器输出相位反转和输入过压保护

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