• Boosting AD8642 output current

    I'm testing a design in which I need to do a current to voltage conversion. The current ranges from picoamperes to 100mA (both positive and negative), so I use 4 different resistors and a switch to select each of them. I filter the corresponding signal…

  • 使用AD8642组成有源低通滤波器,仿真波形奇怪,求解释思路

    使用AD8642与二阶RC低通滤波器组成有源二级低通滤波器,电源供电0~5V(上限可能到5.1V),输入信号为以2.5V为基准轴的400Hz正弦波,幅值为0.1V(经由400Hz,0.002V正弦波源信号放大50倍并抬升2.5V得到)。反向输入端接入2.5V基准电压,低通滤波器截止频率为497Hz,品质因数为0.707。我计算的结果是输出信号是以2.5V为中心,频率为400Hz,幅值约为2.1V的正弦波。Vout = 2.5V+(Vin-2.5)(1+R8/R10),仿真电路如下图。

    但是在Multisim仿真输出的波形却很奇怪…

  • RE: Low input bias current. Which one to choose?

    Some of the other choices are:

    ADA4610-2 if you need a dual

    AD820, AD822

    AD8641, AD8642

    AD8610, AD8620

    AD8510, and ADA4610-2

    All of these are stable at gain of 1 for your voltage follower

  • RE: AD8066用哪个芯片可以替换

    关于测量光电二极管的应用,最主要的参数就是要看运放的偏置电路Ibias以及带宽。还有运放的输入范围。

    对于您的要求,您可以考虑AD8642. Ibias和功耗都比较小。带宽也可以满足您的要求。

  • RE: Transimpedance Amplifier (Photodiode interface)

    FormerMember
    FormerMember

    Rookie,

      When I do a sim on the power supply, you have no attenuation with R20 and C20 until you get past

    15 kHz.  Try increasing R20 to 100 ohms and C20 to 10 uF.  Would also help to put a small ceramic

    (0.001-0.01uF) across C20.

    The AD8541 is CMOS…

  • TAGS LIST: Amplifiers

    AD600
    AD602
    AD603
    AD604
    AD605
    AD8264
    AD8330
    AD8331
    AD8332
    AD8334
    AD8335
    AD8336
    AD8337
    AD8338
    ADL5246
    ADL5330
    ADL5331
    LTC6412
    HMC6187G
    HMC997G
    HMC996
    HMC694G
    AD8368
    AD8351
    AD8367
    AD75071
    AD552…
  • Noise optimizing AD8599 &&

    Good day,

    I have a task to optimize noise in BW 10Hz - 10kHz.

    Voltage gain shall be around 20..50. OA connected directly to source of signal,

    which has impedance 1kOm DC and 50Om AC. OA connected to middle point of R1/R2 divider,

    where R1 connected…

  • ADI芯片辨识、型号查找

    看看截图: