• 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…
  • FAQ: OP-AMP choice for active PLL loop filters

    Q.

    What are some recommended op-amps for active loop filters?

    ------------------------------------------------------------------------------------------

    A.

    The RF Apps team often gets asked for recommendations on op-amps for active loop filters…

  • RE: Voltage-controlled current source

    Just to report you that I think I found the issue in my schematic. It seems I can't use AD8603 buffer because its supply voltage is up to 5.5V. With 5Kohm load resistance and 2.5mA load current, I go beyond 5.5V. 

    Consequently, the solution for the…

  • RE: High Input Impedance op amp

    Hi Qian,

    Apologies for the delay of response. We have a lot of amplifiers that has a very large input impedance in our portfolio. To see this, you can go to this link - click the choose parameter and Enable the (Rin  Typical) on the filter options by…

  • RE: Preamplifier (impedance matching) for EVAL-AD7357EDZ

    Thank you very much Emmanuel for your answer.

    Actually I was thinking not to modify something on the existing EVAL-AD7357EDZ but to have the appropriate evaluation board additionally which will play the role of a pre-amplifier. Do you think that this…

  • TAGS LIST: Amplifiers

    AD600
    AD602
    AD603
    AD604
    AD605
    AD8264
    AD8330
    AD8331
    AD8332
    AD8334
    AD8335
    AD8336
    AD8337
    AD8338
    ADL5246
    ADL5330
    ADL5331
    LTC6412
    HMC6187G
    HMC997G
    HMC996
    HMC694G
    AD8368
    AD8351
    AD8367
    AD75071
    AD552…
  • OP-AMP choice for active PLL loop filters

    The RF Apps team often gets asked for recommendations on op-amps for active loop filters.

    Active loop filters are typically required to drive wide tuning range VCOs where the tuning range

    is greater than the PLL on-chip charge pump output voltage.

  • 3/9/16: Sensors and How to Use Them

    Presenter: David W. Kress, Director of Technical Marketing

     

    In this webcast, we’ll introduce the concepts of changing physical signals into analog/electrical signals and then back into physical signals. A whole range of devices will be discussed including…

  • ADI运算放大器选型指南

    ADI运算放大器选型指南