• RE: ADA4938-2 problem

    Hi Den,

    Few questions on your circuit.

    What is you input voltage level? I need to know if the amplifier output is still in the specified output swing. With your current circuit, VCM=0.9V and output swing limited to + 3.8 V, the input should be between…

  • exact value of the differential output impedance of the ADA4938-1 or ADA4938-2

    What is the exact value of the differential output impedance of the ADA4938-1
    or ADA4938-2. Is it 2ohm or 5ohm or 20ohm?There are S parameter plots S11 nad
    S22 in the datasheet but I don't know to which circuit they apply to or to
  • ADIsimPE How to use diffrential amp?

    Hi, all.

    I'd like to simulate diffrential amp(ADA4938-2) by using ADIsimPE.

    So I imported ADA4938-2's spice model and define the symbol,

    ADIsimPE doesn't show the correct symbol.

    How do I define the correct symbol?

  • RE: AD9613 input driver question

    By the way ... I've paid an attention to the caption of figure 47 ... " Figure 47. Differential Input Configuration Using the ADA4938-2 " While the OpAmp shown is ADA4930-2.

  • ADC driver for AD9255

    I'm planning to use the AD9255 single 14 bit ADC with DC coupled input signals in the dc - 20 MHz range.

    Because of the DC coupled requirement I am looking at ADC driver amplifiers instead of a transformer.

    The AD9255 web page recommends the ADA4937…

  • RE: AD9268采集脉冲波形的疑问

    AD8138可以作为 ADC driver,但是其-3dB带宽只有320MHz,所以最好采用ADA4938-2

  • 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…

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

    • Hi Jino,
    • there is capacitive sensor that gives a signal in the frequency band 0-500mHz. I want to be placed in it close proximity amplifier (ada4927 or ada4817or ada4938 or ada 4939) amplifier with a gain of 1-2 and hand it to an oscilloscope. How…
  • ADIsimPE How do I define the correct symbol?

    Hi, all.

    I'd like to simulate diffrential amp(ADA4938-2) by using ADIsimPE.

    So I imported ADA4938-2's spice model and define the symbol,

    ADIsimPE doesn't show the correct symbol.

    How do I define the correct symbol?

    ADIsimPE run on SIMetrix…