• AD8691放大问题

    AD8691使用3.3V供电，同向输入端偏置电压为1.65V，反相输入端为振幅0.1V，直流偏置0.1V，25k的正弦波

    放大倍数2倍，但是输出不对，AD8691是轨到轨运放为什么不能输出放大2倍的波形呢

    输入端的波形

    C1右端的波形

  • Amplifier' Input Current Noise Density

    Hi all,

    I want to know the input current noise density of AD8691,　AD8641,　AD8615、LTC6240 that do not be shown on the datasheet.

    Could you share the typical performance graphs?

    Best Regards,

    Leo

  • RE: 印象•ADI放大器——有奖互动，说出你的ADI放大器印象

    AD8691不错的选择，收藏了

  • RE: LTspice库里面找不到AD8692元件怎么办？

    AD8692用AD8691的spice模型，AD8692是双运放，AD8691是单运放。

    其他器件如果在LTspice中找不到，可以到ADI官网上下载相关spice模型（.cir文件），每一个运放的页面基本都能找到相关的spice模型（一般在Datasheet下面）。然后将cir文件导入到LTspice中自建电路模型。

    附件中是如何在LTspice中导入模型文件的方法：
    PDF

  • RE: ADA4530-1 Die level option

    Hi Mika,

    We currently don't have ADA4530-1 in a die level and I'm  not sure if we will have in the near near future. However, i found these few devices with 1pA typical bias current operational amplifiers in die/chipscale package. We have AD8691…

  • About Input voltage range

    Hi there,

    I have a quesion about AD8691.

    http://www.analog.com/static/imported-files/data_sheets/AD8691_8692_8694.pdf


    Looking at the input voltage range of the datasheet, it says +3.9V(Max) at Vs=5V.

    And also this is  specifired at　T A  = 25°C.

    I need…

  • RE: ADMP441, SSM2529 Speech transmission

    Thank you for a thorough explanation.

    I have looked further at your catalog of op-amps. Since I am designing a portable unit, I examined the following, with 5 V supply:

    AD8605/AD8606/AD8608, AD8691/AD8692/AD8694, AD8655/AD8656, and the ADA4075-2.

    …

  • RE: What's the input resistance of ADA8691?

    Hi hulala,

    Because the AD8691 is a CMOS amplifier, it should have very high input impedance. I do not think there will be any problems with interfacing this to the ADMP411. I have communicated with the engineer of this part to try and see whether I…

  • RE: Replacing LMV84x by AD8646/8648 ?

    Hi Usaghi,


    Regarding to your first question,  you're right about Vsy and Isy. Vsy or simply Vs, is the supply voltage of the part while Isy is the supply current per amplifier of the part.


    On your second question, actually our parts has input…

  • RE: Specifying a driver amp for high-resolution precision ADCs

    The first thing to compare is the Signal-to-Noise and Distortion (known as SINAD) of the ADC to the distortion and noise (THD+Noise) of the op amp. You want the SNR+THD of the amplifier to be less  than (i.e., more dB)that of the ADC. For example, the…