• Bootstrapping ADA4530-1

    I am evaluating ADA4530-1 as a unity gain DC-coupled buffer amplifer for it's low input bias current together with the low input offset drift.

    Since the bandwidth and slew rate is low, and the input capacitance and distortion is high, I am considering…

  • ADA4530-1的仿真

    我用PSpice加载了ADA4530-1的.cir文件后,里面有buffer/ADA4530/Amplifier三个子电路,我想请问这几个电路分别的作用是什么?

  • Questions while reading the specification of ADA4530-1 .

    Hi,

    Because of the lack of my experience, I have faced a question while reading the datasheet. After a lot of searching, I still have no idea. Thanks in advance for your guidance.

    The question is about the picture below.

    The open-loop gain and phase…

  • ADA4530-1输出异常

    案例:使用ADA4530-1测量超低荧光信号,荧光信号(具有调制频率的脉冲信号,目的是通过隔直与后级检波滤除背景光造成的直流信号)经光电二极管转换后,电流强度在25pA~2nA之间,Rf=22M.输出

    问题:与荧光信号输入同时存在的自然光背景光(滤光片无法100%滤除),该背景光等效于一个较大的直流信号,当该信号强到使得DC输出最大即DC信号已失真时,ADA4530-1会输出一个固定的10-20mV,具有一定规律的脉冲信号,该脉冲信号远大于实际需求信号,直接把荧光信号完全淹没。只要直流信号放大后仍小于电源供电…

  • ADA4530-1的电路设计

    ADA4530-1的参考电路CN0407能够检测fA级电流,但电路中使用的开关ADG1419的漏电流为nA级,需要什么样的处理来避免ADG1419的漏电流对被测电流信号的影响?谢谢。

  • ADA4530-1损坏问题

    使用ADA4530-1作为光敏二极管的放大电路,采用垮阻方式,放大倍数为5GV/A由于没有超过1Gohm的电阻,于是用若干1Gohm电阻串联替代,同时并联上若干0.5pF的电容串。预估的-3dB带宽为0.5~1KHz量级。

    初次测试后信号显示的结果与设计相符合,由于某些器件参数需要调整,遂拆下电路板进行调整,可能是由于拆装过程中没有注意保护,导致上电之后信号显示以下不正常:

    1.使用与之前同一线性电源(AC220->DC5V,电源负极接地,电路屏蔽接地)供电时,信号上出现频率为100Hz左右的规律噪声…

  • ADA4530-1做电流灵敏时的压摆率问题

    我现在在用ADA4530-1做一个电流灵敏前置放大器,探测器输出的电流大小为2nA~60nA,脉冲宽度只有10ns左右,在仿真的时候总是出现压摆率不够的问题,请问有解决的方法吗?

  • ADA4530-1 Die level option

    Hi,

    Is it possible to get ADA4530-1 amplifier with die level "package"?

    If not, what is then the best amplifier with die level package if the critical parameters are:

    - IBias under 1pA and offset voltage as low as possible (this will be use…

  • Pin floating in ADA4530-1?

    Dear Support

    I have read everything I could about ADA4530-1.

    However I have still one important open question:

    In the ADA4530-1R-EBZ User Guide (UG-865) I observe
    that the Pin No 3 IS CONNECTED to the negative rail
    in conflict to the explicit statement…

  • offset trimmimg for ADA4530-1

    Hi, 

    I am using ADA4530-1 amplifier for TIA application. Measuring 10pA . How to do offset trimmimg is there possibility for the user to trim the offset? As there is digi trim in the wafer stage but can trim be done manually??

    I am using CN0407-1-SDPZ…