• Problem of PCB layout  of  ADA4899-1

    Hi all,

      It is suggested  in the datasheet of ADA4899 that all ground and power planes under the pins of the ADA4899-1 should be cleared of copper to prevent the formation of parasitic capacitance between the input pins to ground and the output pins to…

  • ADA4899-1输入保护问题

    读ADA4899-1的datasheet，输入端有二极管保护，而Absolute maximum ratings里面，说输入差分电压是±1.2V，这种情况还需要在外部加限压吗？应该是靠内部二极管保护就可以了吧？输入脉冲电压，幅度随机，一般在1V以内，少数可能达到3V以上。±3.3V供电。偶尔出现运放失效的情况。

  • ADA4899-1的放大和单位增益电路

    请问使用ADA4899-1做单位增益和放大电路（10倍）时候，最适合的电路是怎么设置的，能分别提供一下电路吗？

  • ADA4899-1

    Hello

    I was wondering if anybody could give us THD frequency sweeps in the audio band 20-20Khz of the ADA4899-1 with gain set to 1. I was wondering if its THD performance was better than the AD797. I would like to use this device in I/V stage of a high…

  • Noise model of ADA4899-1 for LTspice

    Q 

    When doing a noise analysis in Spice (LTSpice) using the model provided for the
    ADA-4899, the noise output is orders of magnitude larger than specified in the
    datasheet.

    At first glance it seems like a noise current of ~12 nA/√Hz is…

  • RE: Question regarding ADA4899-1

    Hi Richard,


    Good Day!

    1. If you noticed most of our SOIC package High Speed Amplifiers pin outs, pin 5 was allocated as NC or No Connect. Take ADA4857-1 as an example.

    The difference between ADA4899-1 and other HS amplifiers is the modified pin-outs…

  • ada4899-1的布局布线问题

    看了关于4988-1的评估板用户指南（UG-083、UG-084），其中说明该芯片引脚下面的所有接地和电源层应不含铜层，对于4层电路板来说，顶层、电源层、地层、底层对应位置的铜也要去掉吗？如去掉，那散热焊盘怎么连接到地层?

  • AD8099 ADA4899-1... mux them together

    Hello,

    I'm using 2 AD8099 (G=20) and 2 ADA4899-1 (G=1), all four are muxed to drive a AD8331...

    The circuit should be very low noise and the Bandwidth around 30MHz.

    I'm wondering how many others AD8099 can I add, without degrading performance?…

  • 关于ADA4899-1芯片设计的缓冲器的问题？

        关于ADA4899-1芯片设计的缓冲器的问题，如图是电路图C6与C5是0.1u的交流耦合电容，R1是47欧姆，C1与C2是电源去耦电容分别0.1u与0.01u，电路制作出来后输入端接峰峰值300mv左右频率17.9MHZ的DDS信号，输出端用示波器和频谱仪观察到非常严重的失真，HD2为-10dbc左右，其余谐波多在-25dbc，请问下我的电路设计问题可能出在哪里？不胜感激

  • ADA4899-1 Offset voltage

    HI?

    I am using the ADA4899-1YCPZ.

    The data sheet states offset voltage: 230uV Maximum.
    When I used it, I had an offset voltage of 1.3V.

    I put the result of the simulation as an attached file, and I used the PCB circuit diagram I actually created as…