• OP285: FAQ

    FAQ

  • OP285: Input Common Mode Voltage Range

    Q 

    I have a question about input voltage range of the part OP285 with Vs=+-15V.
    There is Vcm in datasheet which is ?10.5V to +10.5V. Does this mean that I
    can't input voltages greater then 10.5V but less then Vs ?

     

    A 

    The input voltage range of…

  • OP285作为电压跟随器发生自激振荡

    使用OP285作为电压跟随器，反馈电阻为100kΩ。发现当输入电压V1为0V时，OP285的输出会发生自激振荡，频率为上百kHz。

    把反馈电阻更换为几kΩ或更小，则不会发生自激振荡。请问这是什么原因导致的？OP285应该是单位增益稳定的吧？

    下图是用Multisim的仿真电路，从仿真的示波器可以看到这个现象。

    谢谢了。

  • Operational amplifiers for usage in GIC

    Dear AD Engineers,

    In order to construct device for measurements in condensed matter physics we analyze different filters.

    We search a modern operational amplifier for usage in Generalized Impedance Converter (GIC).

    Looking in AD collection of dual operational…

  • RE: OP295 inverting/non inverting amplifier

    Hi Temistocle, 

    Are you referring to the OP295 or the OP285?

    In general for choosing resistors for your gain configuration, you will have to think about power and noise. 

    In terms of power, the amplifier will see the feedback network as a load, so if you…

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  • Noise optimizing AD8599 &&

    Good day,

    I have a task to optimize noise in BW 10Hz - 10kHz.

    Voltage gain shall be around 20..50. OA connected directly to source of signal,

    which has impedance 1kOm DC and 50Om AC. OA connected to middle point of R1/R2 divider,

    where R1 connected…

    • LowNoise_OA_selection_AN-940.pdf