• ADA4627-1 and ADA4637-1 Null Inputs Connection


    ADA4627-1 and ADA4637-1 have NULL pins which are offset adjust pins. If I do not plan to use offset adjust what should I do with the NULL pins? Leave it floating or use 100k Ohm pull-up resistors?



  • ADA4627-1 and capacitive loads



    I want to use the ADA4627-1 as output buffer in unity-gain configuration in a DAC application. The op amp input is connected to an analog switch. Therefore high slew rates can arise at the input of the op amp. The resistive load connected to…

  • Photodiode transimpedance amplifier with ADA4627-1

    Hi everyone,

    I have to design a photodiode transimpedance amplifier for an instrumentation application.

    I've used the Analog Device analog photodiode wizard with the following parameter:

    - reverse bias : positive, 12V

    - photodiode capacitance…

  • How to change GBW in ADA4627-1 Spice macromodel ?

    Hi everybody,

    I am currently trying to build a photodiode transimpedance amplifier based on the ADA4627-1 opamp. The first result I have obtained on a prototype circuit are quite bad, as I get a lot of excess noise generated inside the circuit.

    I think…

  • RE: Mass/Weight of AD542/AD549/ADA4627-1/AD8638

    Hi Chris,

    The mass of AD549 is 1.00 gram for a terminal finish of Au(Gold) and 0.945 gram for a terminal finish of 63Sn37Pb(Tin-Lead). I think the AD542 is an obsolete part.  What package of AD8638 and ADA4627-1 are you using?



  • ADA4627-1 Input & Output Voltage range @V+=5V, V- = -5V


    My customer is considering ADA 4627-1.
    So I got a question.

    What is the input voltage range and output voltage range

    when ADA4627-1 is used with V + = + 5V and V- = -5V?

    Best regards,


  • RE: Will there be a dual version ADA4627-1.


    Thank you so much for your attention on this issue.

    I would really like an ADA4627-2. Limiting to 0-70C is completely OK.

    Why? My application would use such a chip as a two channel input buffer

    to a high-speed power opamp - so the ADA4627-2…

  • RE: ADA4627 Grade A and B in the Data Sheet

    Hi Alexey, 

    Thanks for bringing your question to the forum. 

    You can determine the grade of the part by the letter after the part number. For ADA4627-1ACPZ-R2, the A should mean that it is a grade A part. ADA4627-1BCPZ-R2 would be the B grade part. 


  • ADA4627 trailing edge delay after saturation

    Hi, all.

    I bumped into a very strange behavior of ADA4627 op amp, and will be very grateful if you give me any tiny insight into what's happening. Right now I even don't know where to look for solution.

    Here is our scheme, as it appears right…

  • RE: ada4627,ad8253电流异常大



    1. 先断开输出电阻R24,考察耗电情况,以及AD8253输出的波形;

    2. 断开ADA4627 和 AD8253的连接,单独测试ADA4627,看其耗电情况和输出波形,然后用信号源给直流电压于ADA4627的输入端,测试其输出的变化;

    3. 将断开后的AD8253的输入端接地,然后测试耗电情况,和输出波形,然后再将输入端接入信号源,给直流,测试输出;