• RE: AD9265 cmos clock driver

    My signal is IF signal at 10.7MHz, which can go -50dBm to 0 dBm.

    I am thinking to use AD9650 instead of AD9265.

    to convert single ended to differential i am planning to use ADA4938.

    I will add 10dB gain by using ADA4938.

    How much max gain ADA4938…

  • RE: Can I use ADA4938 as a differential driver and receiver?

    Hello John,

    I am trying to use ADA4938 as a differential driver for transferring signal from board to board (DC coupling through SMA cable). I am wondering what is the output impedance of ADA4938 when it's configured as a DC coupling differential driver…

  • Simulation Problem of ADA4938-1

    Dear Emman.A,

             I want to use ada4938-1 to drive the ADC ad9629, before we start the design,  I do the simulation of ada4938-1, but I met some problems when I do the simulation. 

    software: Orcad PSpice

    the steps of simulation:

        First , I get…

  • Need recommendation for a dual supply converter solution for ada4938.

    Does any ony know of a supply solution for +/-5 volt dual supply for noise sensitive ada4938 analog front end application?

    Application includes 18 total ADA4938's that need+/-5V.

    Any help is much appreciated.


  • how to reconcile the capacitive sensor with a close differential amplifier?

    ADA4938 or ADA4939  in the band 0=500mHz  C=some Pf

  • Does the voltage of pin Vocm influence the gain of ADA4938?

    Hi ,

       I use the ADA4938 to Drive the ADC(AD9629), the pin Vocm connected to pin VCM of AD9629, and the output voltage of pin VCM is MID AVDD Supply (0.9V).

    The schematic is shown below, and the gain of ADA4938 should be 0.5 in theory. 

       When the…

  • 请问全差分运放ADA4938 POWER DOWN脚可以悬空吗?

    全差分运放ADA4938 POWER DOWN脚可以悬空吗??

  • ADA4938 not static CMRR at low frequencies

    We are reevaluating the use of the ADA4938. The CMRR is specified to be TYP: -75dB @ ∆VIN, cm = ±1 V, f = 1 MHz.

    The CMRR measured on an Eval Board with ADA4938 reveals, that the CMRR is strongly frequency dependent. (red curve: ADA4938, blue: ADA4932…

  • ADA4938 common mode setting


    i am confused about the common mode voltage setting of ADA4938 differential OpAmp. As mentioned in the datasheet we would like to set the output common mode voltage via OCM input and an external resistor devider. The OpAmp has dual supply (+/…

  • Correct operation of ADA4938-1...

    I would like to ask if it is possible to use Cf - capacitors parallel to Rf - resistors in feedback like with AD8138 (Figure 42. Circuit Definitions in datasheet) with this differential amplifier (ADA4938-1)? Will be it stable? I want to use it like…