• 發現ADA4841-2新的問題!!!!

    小弟起初在ADA4841-2的輸入端+IN跟-IN沒有接任何東西,當輸入端沒接電壓時,量到的是4.3V左右,

    之後在輸入端+IN跟-IN兩點並上10K電阻,當輸入端沒接電壓時,量到的是則變成0.03V左右,但它仍然沒辦法達到軌到軌,

    參考電壓在5V情況下,輸出電壓仍然只有4.3V。

    AD的專家們,麻煩幫忙一下,這問題困擾好久了,而且在datasheet上好像沒有說要在輸入端+IN跟-IN兩點並上電阻,

    該怎麼處理比較好呢??,謝謝大家的幫忙!!

  • ADA4841-2 管脚IN+,IN-一直有电压是什么原因?

    在给ADA4841-2通电后,IN-和IN+无输入信号情况下,两脚都有电压,而且输出脚也有电压,电压在4V左右(电源电压为正负5V),这是什么原因?

  • 利用ADA4841-2,但輸出無法達到軌對軌

    小弟利用ADA4841-2,VS+為5V,VS-為GND,當輸入電壓大於4.3V以上時,輸出只能到4.3V;當VS+為6V,輸出就可以突破4.3V,

    這樣不就沒有軌對軌功效了,難道還是有0.7V的壓降嗎??

    附件是我參考的電路,麻煩各位高手幫我解答一下,謝謝

    另外,我是利用AD8031做REF的穩壓,利用ADA4841-2做輸入端的穩壓,用以實作AD7685的16bits ADC量測,線路接法皆是參考AD7685的datasheet,

    因此發生上述的問題,還有個疑問,當輸入端電壓沒有接任何東西…

  • ADA4841 Input voltage headroom

    Hi there,

    I'm building a precision voltage generator and I'm using a DAC to drive the ADA4841 which is in a voltage follower configuration.

    Previously it was the ADA4807, but it had some issues like: powering the unit from the USB and batteries…

  • 使用ADA4841-2作为AD采集驱动时偏置电压有4V多,为什么?

    数据采集A/D采用AD7980,根据数据手册建议采用ADA4841-2作为输入驱动,但现在的问题是ADA4841-2的输入端电压偏置为4.17V(未接任何输入的情况),导致根本无法输入模拟信号(0~5V)。求教各位专家。

    已经做了一下实验:(1)单独给ADA4841-2上电(板子上无其他任何器件),(2)断开后一级,即与AD7980断开连接,输入端的电压为4.17V左右,输出为4.9V多。

    另外,将-Vs接到地也是同样的情况。被这么个AD驱动折磨死了。

  • RE: ADA4841 Exposed Pad

    Hi,

    Either you power it with dual or single supply, it's the 0V that we'll consider GND.

    Regards.

  • ADA4841-2YRZ Op Amp

    I am laying out a board based on the ADAU1452.This is the eval board for the DSP. I cant find a spice model for the ADA4841-2YRZ. This is my first time laying out a board. I have the dash 1 part in my data base. But can't seem to get the model for the…

  • RE: ADA4841 spice model

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
  • ADA4841 input current range

    HEllo,

    I am planning to use the ADA4841 to drive the AD7980 and am having trouble finding the input current range of this amp.  Is it 10nA to 10uA?

    Thank you,

    Frank

  • DA+运放,运放的输出直流电压高怎样调低?

    我用的DA是ad1934,运放是ADA4841-2,附件中第一张是我的系统图,BF518----AD1934----ADA4841,ad1934转换完毕后接入ada4841。第二张是AD1934,第三张是ADA4841电路图。

    我们DA转换的是心肺音频信号,DA转换输出的信号如第四张图片,我想把信号放大,调整的的电阻如第三张ADA4841电路图中的R25 和R31,最开始这两个阻值都是10k,因为声音小我把他换成了12k和20k,12k的如压缩包12k.zip,我用示波器测量的是out端点上的波形…