• RE: AD8422增益控制

    输入不能浮空,浮空会导致很多的不确定性,比如有一个漏电流流入你的AD8422,而AD8422的输入阻抗又很高,可能会导致产生一个不确定的电平。如果你想确定你的增益正常,需要将输入接地。VDD断开后,你的运放不工作,当然信号为0.

    你可以看看我们的可编程增益仪表放大器PGIA,比如ADA4254和LTC6373

  • AD8422

    AD8422设计放大100倍,+/-12供电电路,当输入超过0.1v时,供电电源出现偶次谐波,如何能消除这个影响呢?

  • AD8422

    Dear all, 

    I'm testing AD8422 using EVAL-INAMP board. 

    Test set-up is the following:

    • +/-5V power supply
    • Signal generator with the following configuration: sinusoidal waveform, 134mV pk-pk, 0V offset, 100kHz. 
    • AD8422 gain set to 5,5 (Rg=4,4kOhms),
    • AD…
  • AD8422

    Hi,

    I'm using AD8422 to amplify the siganl from bridge circuit.

    when I/P voltage 5V,RG = 301 ohm i see the output amplified linearly.

    for 0KG on bridge ckt = 0.3824V

         1KG                 = 0.5089

          2kG   = 0.6350

           3Kg = 0.7611

    But for RG = 100 ohm

    0KG = 2…

  • What makes AD8422 robust

    The data sheet mentions robustness as a feature. What makes AD8422 robust

     

    AD8422 extends the standard set by the AD8421 in robustness. It is one of the
    most robust instrumentation amplifiers on the market today. It features high
    ESD…
  • AD8422 Test Result Check

    Hi,

    I'm trying to find out the reason of difference result with voltage divider at the VIN+/VIN- inputs and without it.

    Can you please help me to find out the reason ?

    Test 1. : Diamond Plot

                      Input : Vin+ = +3V DC, Vin- = GND

                      Output = 3V

  • AD8422 amplification issue

    We are using op-amp (P/N: AD8422BRZ) to measure current using Rsense (10 ohms resistor). The calculations and simulations are matching but the actual measurement doesn’t.

     For the given below circuit, With 270 ohms load, I = 86mA.

    Drop across R50…

  • Question about AD8422

    Hi All,

    I didn't know that AD8422 minimum single supply voltage spec changed from 3.6V to 4.6V. I have not checked its data sheet in English, only checked the one in Japanese. Certainly some AD8422s' Gain I have been testing are smaller

    than…

  • AD8422和AD8429

    在50Hz交流mV信号放大中,相同放大倍数,相同外围电路下,AD8422到3.6mV时输出信号就开始不再正弦,AD8429到6mV后输出信号才发生变形,这是什么差别导致的呢。

  • Experimental CMRR calculation of AD8422.

    I have used  AD620 for my earlier analog front end circuits. I want to replace AD620 with AD8422.

    I want to replicate the CMRR vs Frequency graph given in the data sheet and the results I have got is too diverse.

    Can anyone instruct me the techniques…