• ADA4807 ByPass Capacitors

    Good Day,

    I have a question about decoupling and bypass capacitors for ada4807. In datasheet its written one is ceramic and the other in parallel is tantalum. The question is can i use both ceramic caps instead of this tantalum or tantalum is necessary…

  • Not able to understand ADA4807-2ACP's behavior

    Hi

    I have set up the ADA4807 in simulation as shown in the picture below and I do not seem to get the gain unlike mentioned in the article A Low Power, Low Cost, Differential Input to a Single-Ended Output Amplifier | Analog Devices

    What am I doing wrong…

  • ADA4807 Input Output Range

    Hi

    I have a question ADA4807.

    My customers are using the ADA 4807 with 3 V drive.
    Signal characteristics near GND are not good

     

    I want to know the actual value about the Input Common-Mode Voltage range and Saturated Output Voltage Swing.

    If you know…

  • 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…
  • ADA4807 simulation mismatch with circuit

    I am using an ADA4807 as a unity gain buffer, with a +5V and -2.5V supplies. The +ve input is ac coupled to a signal that varies between 17V and 19V @ 250kHz. I have a 100k resistor to ground on the +ve input also. If I simulate this circuit using LTspice…

  • 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…

  • What type of converters can the ADA4807 drive?

    What type of converters can the ADA4807 drive?

     

    The low broadband noise of 3.1nV/rHz and the low distortion of -139dBc makes
    the ADA4807 an ideal option for driving 16 and 18 bit SAR converters such as
    the AD7980, AD7685/AD7686 and the…
  • ADA4807 Is the device correctly modeled in LTSPICE

    I was using STSpice with the ADA4807 device and it looks like the input bias current is not implemented in the model. When I compare the real HW  to the simulation it looks like the voltages at various parts of the circuit are not correct in the simulation…

  • 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