• ADA4522 1/f noise?

    Hello!

    The datasheet of ADA4522 shows the measured voltage noise density for only  > 10 Hz frequency region.

    I was measured the power spectral density (square of voltage noise density) in the 0.001-32 Hz range.

    The result is shown at the attached figure…

  • ADA4522 clamp circuit and

    I have two questions about ADA4522

    1. For sure.  Amplifier have input EMI filter and clamp circuit with limit the input current to ±10 mA

    Should not be a problem with the situation shown in Figure?

     

    2. ADA4522 have Input Bias Current 50 -150pA,…

  • RE: can OP07 be used with single supply ??

    Yes, but not with 5V;  you need at least 6V across the part.

    But why choose  an OP07 that is over 30 years old?  We have done many generations in the OP07 family,

    OP07 -> OP77 -> OP177 -> OP777 -> OP1177 -> AD8671/8675 -> ADA4077-1.

  • RE: AD8628 Spike bias current

    Hi,

    We haven't measured the AD8628 bias current's spike but I can say that there could be spike in bias current based on the internal structure of zero- drift amplifiers. It could be small or huge but I cannot say the exact amplitude unless tested. Why…

  • RE: what is the ad8676 best voltage follower setup?

    Hi Harry,

    Thanks for your help on this.

    ADA4522-1 looks very promising, ibias=150p, vos=5uV, p-p noise =117n, and dual supply from -/+22V, which i willbe using +/-15 as my max signal is 12V.

    I think I may go with this one.

    One final thing on the feedback…

  • 反相比例放大器精度不够,怎么回事?


    如图使用ADA4522,正负15V供电,反相放大R5、R4都是10K-0.1%,R6为5K-1%,C1为1nF。

    放大器输入电阻R5左侧输入0.9V,而输出只有0.88V,怎么误差怎么大?换成OP27G,也是一样,谁能解释一下,感谢!

  • RE: 2017年最受欢迎的《模拟对话》文章

    了解及消除1/f噪声

    1/f噪声是什么,以及在精密测量应用中如何降低或消除该噪声。1/f噪声无法被滤除,在精密测量应用中它可能是妨碍实现最佳性能的一个限制因素。

    使用零漂移放大器和零漂移ADC时,必须知道各器件的斩波频率,并清楚可能发生交调失真(IMD)。当两个信号结合时,所得波形不仅含有原先的两个信号,还有这两个信号频率的和与差。任何情况下,当设计一个采用零漂移或斩波器件的系统时,必须考虑IMD。应当注意,大多数零漂移放大器的开关频率远低于ADA4522-2。事实上,设计精密信号链时,高开关频率是ADA4522系列的一项关键优势…

  • RE: circuit for ultra precision INA @gain = 1.0

    Hi Axel,

    Our zero drift inamp available are LT2053 and LTC6915, AD8231. You can also browse our portfolio on this link and categorize parts from lowest to highest of particular specs that you want to check. Those parts have the lowest offset at gain of…

  • TAGS LIST: Amplifiers

    AD600
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    LTC6412
    HMC6187G
    HMC997G
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    AD8368
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  • RE: Amplier signal of nanosensor.

    Hi,

    Apologies for delayed response.

    I'm not really sure what your application looks like without having more details, however, I can give some quick and general recommendations that might work for your application. If you have small current signal in…