• ADA4807-2

    我用ADA4807-2搭建一个4阶、通带18kHz——45kHz、通带增益20dB的带通滤波器,仿真完美但是实际电路板上无输出新号。然后我把滤波电路拆成了同相比例放大电路,从3脚注入信号测1脚输出,发现无论输入信号幅值频率如何变化,输出皆为幅值不变的方波,请教一下这是什么原因?是增益过高吗?

  • The spec table states the capacitive load drive of the ADA4807-2 is 15pF. Can the ADA4807-2 drive larger capacitor loads? Will this heavy capacitive load make the amplifier unstable?

    The spec table states the capacitive load drive of the ADA4807-2 is 15pF. Can
    the ADA4807-2 drive larger capacitor loads? Will this heavy capacitive load
    make the amplifier unstable?

     

    Yes, the ADA4807-2 can drive larger capacitor loads…
  • On the current consumption of the ADA4807-2

    Hi,

    I would like to ask about the current consumption of ADA 4807-2.

    Does this IC change current consumption depending on the input frequency?
    If it changes, I want a simple characteristic graph.

    <conditions>
    ± VS = ± 5 V

    Gain=×5
    Input waveform…

  • ADA4807-2 Abnormal behavior during DISABLE

    Hi, I am building test board for ATE testing and would like to use it for device testing. my device input pin has mux  between SARADC and SDADC so i will need to use same opamp to test the ADC.

    1. During dynamic SDADC (AC) 20kHz 1Vp-p, i found out there…

  • ADA4807-2的容性负载问题

    ADA4807-2的数据手册有关于容性负载的描述,其中图69可以看到,对于较大的电容,无需串联电阻来维持稳定性。

    同时,图68可见,电容越小,需要的串联电阻越大

    但是,按照之前学习的理论,运放的容性负载越大,越容易产生自激振荡,从而需要更大的串联电阻,为什么ADA4807的图示和描述和这些理论是相反的呢?麻烦哪位高人解释下,谢谢

  • ADA4807-2 become very heat when it put-in a ±5v circuit?where is  the reason?

    ADA4807-2 become very heat when it put-in a ±5v circuit,but AD8762 is normal。

  • ADA4807-2滤波之后幅值下降为原来10%

    该电路为多反馈滤波电路,单电源供电,放大倍数为1.1,带通中心频率为1M,品质因子为10。

    仿真之后和预期效果一致,但是在实际电路测试时,发现中心频率是对的,带宽也是对的,但是信号下降的非常厉害,只有输入信号的10%,和仿真结果相差较多,请问这是什么原因?

  • ADA4807 Spice Model Slew Rate Modeled Correctly?

    Hello,

    I am using the ADA4807 model to model the ADA4807-2 in an active filter application where the output is a 10 MHz sinewave. The output has a peak voltage of 1.79 V.

    Theoretical calculation shows:

    Min Req Slew Rate = 2 * pi * 10 * f * Vpeak/(10…

  • ADA4807

    We are using the amplifier ADA4807-2 as an integrator. The ADA4807 is powerd from 6V. As an integrator the output is saturated to the rails. In our circuit it seems that the current consumption without any load increases with a few milliammperes when…

  • ADA4807-1 Spice Model Disable

    Hello,

    in ADA4807-1 Spice Model there is an addtional pin called /S. I believe this is disable.

    In a simple inverting configuration, I connect this pin to GND, and I get still an output signal with the expected gain as per inverting.

    Can it be the modelling…