• Feedback resistor value for AD8665

    Hi,

    I want to use AD8665 as a buffer, non-inverting with unity gain. Can I use a 0 ohm feedback resistor?

    For some amplifier, the feedback resistor should be a specific value for unity gain.

    For others, like the OPA279, the feedback resistor can be…

  • RE: AD8666 LTSpice Model

    Hi Dustin, 

    The AD8665 is the single option of the AD8666. I see that it is already in the LTspice library. That model should have the same performance. 

    Thanks,

    Kris

  • What is the input referred current noise for the AD8655/6?

    What is the input referred current noise for the AD8655/6?

     

    On CMOS op amps, the current noise is very, very low. It’s usually negligible.
    That’s why you don’t see it on the datasheet. The current noise for the AD8665
    is in only tens…
  • AD8661: Input resistance

    What are the input resistance spec of AD8661 AD8665 AD8605 series?

     

    It is always very high for low Ib CMOS amplifiers.
    AD8605 = at least 100 Megohms.
    AD8661 and AD8665 = at least 1 TeraOhm

    1 way to get an estimate :
    Go to the op…
  • RE: What amp op to use to drive an FDA common mode pin?

    Hi EVC,

    Let me recommend you the following parts for your buffer. You can start from these four.

    Part # Supply Current Noise (nV/rtHz) PSRR (dB) Vos (mV) Price ($)
    AD8031/2 800 …
  • AD8655 current noise

    Searching information on AD8655 current noise on this website (nothing is found in the datasheet) I find this kind of answers:

    "On CMOS op amps, the current noise is very, very low. It's usually negligible.  That's why you don't see it on the…

  • 使用AD8663作为光电二极管IV转换电路振荡的问题

          我使用AD8663进行光电二极管IV转换,Rf=1M欧姆,Cf悬空。近似无光照条件下,AD8663输出数十毫伏的近似正弦波。Cf=100pF,其他条件不变,输出正弦波幅度略微降低。 请问用什么办法能消除这个正弦波呢?

          同样的电路,使用AD8665,输出就正常的稳定直流信号。

          电路如下:

  • 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…

  • [征文] IN118的基准源用AD的芯片,上面写着D6B,困饶我很久了 AD5312


    这个芯片(AD9833)的名字我猜的,可忽略看,如果是这个芯片,左看右看也不知是干吗呢?

  • ADI芯片辨识、型号查找

    看看截图: