• AD8031 PSRR Simulation in LTspice

    Hi,

    for my next course about PSRR, I try to simulate the AD8031 PSRR with LTspice.

    The used schematic is : 

    Result is : 

    This is very different from the datasheet graph (i.e. figure 35).

    How explain that ?

    Best regards.
    Eric PERONNIN

  • AD8031输出信号失真

    hello,

    我使用了AD8031设计了一个差分转单端的电路,硬件制作前使用了LTspice做了仿真确保方案无问题。

    然后硬件制作完后,实际测试时输出的波形明显发生了失真,是交越失真吗?原理图和实测输出如下图所示。其中 Vos是由一个LDO产生。

    我不确定是否是slew rate不够引起的问题,因为经过理论计算AD8031的slew rate是足够的,仿真并未出现这种问题。测试中,使用的信号是5M正弦,200mVpp.

    如果把测试频率减小到1M,这个失真现象几乎就看不到了。

    感谢解答。

  • RE: Capacitive drive of AD8031

    Hi,

    I have the same question, and there was no answer given.

    This article "Voltage Reference Design for Precision Successive-Approximation ADCs" also states that the AD8031 is stable with >10uF loads.

    www.analog.com/.../precision-successive…

  • Transistors / Gates in AD8048 and AD8031

    Hello, 

    I'm wondering how many transistor and/or effective gates are in the AD8048 and AD8031. 

    Thank you for any information might be available and happy new year

  • AD8031 graph in data sheet

    Hi,

    Please Provide AD8031  test circuit used for measuring the results shown in figure 38 and figure 40 of data sheet.

    Jayasree K

  • RE: The unusual distortion of AD8031

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    Thank you,
  • RE: Any other OPAMPs as voltage reference instead of AD8031?

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  • RE: Recommendations from datasheets for AD7665 and AD8031 contradict each other

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  • Reference Buffer with AD8031 for AD768x

    The datasheet of AD7688 recommends adding a buffer to the reference source to meet source's low impedance requirements. Fig 33 on page 16 shows an example. I'm wondering whether that curcuit will work as proposed. Especially in regard to the power supply…

  • Can you please clarify how selection of reference buffer like AD8031 was done?

    Can you please clarify how selection of reference buffer like AD8031 was done? That's an 80MHz op-amp, how will it be stable with 10uF of load