• ADA4084-2 Spice Model Weird Noise Behavior

    I am trying to design a ADA4084-2 into my latest design, but I am receiving strange results when I do noise modeling using the Spice circuit.  The voltage noise at the output is extremely large, even with relatively small feedback resistor values.  It almost…

  • RE: ADA4084-2

    Hi Elias,

    From the ordering guide on the ADA4084-2S product page, it appears the correct model for engineering units is:  ADA4084-2AF-EMX


  • Exposed pad on ADA4084-2

    What's the consequence of leaving the exposed pad unconnected on the ADA4084-2? The datasheet says it must be connected.  Will the result be poor thermal performance or are there other potential issues

  • ADA4084-4S

    The AD P/N ADA4084-4S is controlled by the DLA SMD 5962-15236. On page 4 of this SMD there is a Note7/ which refers to manufacturer's SEE Test Report. AD website has not listed such document. Where can I get this report?

    Thank you,

    Boris Yagudayev…

  • ADA4084 characteristics

    Dear all,  

    I probably posted a message in the wrong forum. Please find below the question related to ADA4084

    Datasheet Table 3 specifies that at +/-5V, typical input impedance is [100KOhms||1.1pF]Differential and [200MOhms||2.5pF]Common mode.

    Are these…

  • ADA4084 SPICE Model


    I'm trying to use ADA4084 spice model inside of LTSpice. 

    However, I'm getting errors "Singular matrix: check node u7:82 Iteration No.1", where u7 is one of the ADA4084 instances. 

    I have read elsewhere online that LTSpice doesn…

  • ADA4084 Settling Time


    -Do you know what does the 0.1% means in the test conditions of settling time ? (see below)

    Settling Time : ts : AV = 10, VIN = 10 V p-p, 0.1%        typ:4µs.

    - I did not understand figure 30, 61,92 of settling time.

    For Figure 92, Vsy=+/-15V, Input…

  • RE: ADA4084增益带宽积


    1. GBP是开环增益性能的一种表述,在比较窄的频率范围内可以视为不变,在一个比较宽的频率范围内,(如跨越了零极点)会有变化;-3dB带宽是运放引入负反馈设定在某种增益下测得的。
    2. 是指开环增益曲线40dB对应的频率是159kHz,和下面的UGC类似。
    3. Unity-Gain Crossover (frequency),字面上解释就是单位增益交叉点频率,UGC是指放大器开环增益曲线与单位增益(0dB)交叉点处的频率。
    4. 一般10-100倍的余量都是可以的…
  • ADA4084 Minimum Supply Voltage, Single-Supply

    I am simulating both the OP484 and the ADA4084 in the attached LTspice schematic. The circuit provides a linear output voltage as a function of the input voltage. The input voltage also biases the amplifier. I originally assumed I should only specify…

  • Strange Input Current in ADA4084-1


    I am using the ADA4084-1 in a non-inverting, follower configuration in a data acquisition application.  The input is AC coupled.  At high input power levels, the input suddenly latches to a high value, and will stay there until the input RMS…