• AD623 min voltage in single-rail vs dual-rail supply mode

    The data sheet for the AD623 lists the supply-voltage range as +-2.5V to +-6V in dual-supply mode, but as +2.7V to +12V in single-supply mode (Table 4).

    The maximum voltage makes sense; +-6V is the same 12-volt difference as 0 to +12V. But the minimum…

  • AD623 LTspice simulation issue. it take too much time

    I download the 1D623 from AD site and simule it with LT spice in transient. 

    about 10min wait it's still a 12% of simulation.

    I don't know what I have to check to solve this. 

    is someone can help me on this please?

    BR

  • Questions about dc bias current return path in AD623

    Hi everyone,

    I want to use AD623 to do the first stage of a large gain multistage amplifier circuit(G = 200~1000). The voltage of my input signal is about 1mV, so i need to remove the dc bias current. If i series 1nF capacitors  at the input of AD623,…

  • AD623 use case

    Hey everyone,

    I just want to check whether im using the ad623 in a way which it'll work.

    I have two connected, both single supply with 0 and 3.3V. The gain resistor is set to 381 and the power supply has a 10uF capacitor  as well as a 100 nF.

    I…

  • AD623能否在反馈电阻端直接加上右腿驱动电路?

    我按照差分输入的设计,在AD623的反馈电阻端提取工模信号,连接到右腿驱动电路上,但是反馈电阻端的直流电压能够达到供电电压,导致输出饱和,右腿驱动电路没有效果。电路的输出端也看不到任何人体电信号,现象与差分输入端空置的现象类似,请问是什么原因?我在AD620参考手册里找到推荐的右腿驱动电路应用,但AD623参考手册里面推荐应用没有右腿驱动电路,但是AD623和AD620的功能相差不大。对了,我的电路采用的是3.3V的单电源供电。

  • Difference between AD623 and AD8421

    Hello,

    I use both AD623 and AD8421 as instrumentation amplifiers for subtracting an electrical signal. Although both are set to the same gain, AD623 shows much better signal to noise ratio. 

    So, my question is, what is the differentce between AD623 and…

  • AD623 using

    I'm now using AD623, single power supply +12V, need to convert 0~5V output signal into 0~10V, but now can only get a maximum of 7.5V output signal instead of 10V. The attachment is the circuit diagram, can you help me check if there's any mistake with…

  • 关于AD623输入端串联电容的问题

    在用AD623做放大电路的时候,我遇到了一些问题,特此请教。

    在Multisim仿真结果中,AD623在输入端分别接入电容,输出端可以正常放大信号,但是在实际情况下,AD623的输入端分别串联接入10nF的电容,它无法正常工作,其输出电压等于偏置电压,但是,去掉输入串联的电容后,它又可以正常工作了。

    请问为何仿真结果和实际结果不一样,造成AD623无法正常工作的原因是什么?有没有什么好的解决办法?

    下图为仿真结果:

    下面是实验结果:

    实验结果是恒定不变的直流电压,其值等于偏置电压。

  • AD623不线性放大问题求教

    求教大神,如图所示是我的放大电路,AD623采集电流采样电阻上的差分电压,放大后送到ADC芯片,出现的问题是我电流在0~8A以下,运放放大很线性,但电流再继续往上增加,运放就不在线性输出了,实际输出总是比放大倍数小,(我的采样电阻值约为1.67mΩ,测量运放的差分输入随着电流的变化还是很线性的),因为5V电源电源供电,所以我的采样放在了低端,共模电压很小,但运放输出也没超过1V,按理论计算,12A电流的时候,运放输出也就在0.6V左右。为什么会出现电流大了就不线性了,找了好多天原因了,求帮助。…

  • Alternative to AD623

    Hello,

    I tried several models for my design (put under NDA). Best result was with AD623. However, I wonder if there is an instrumentation amplifier with the same architecture as AD623 is available with less noise.

    What I believe to be needed is not normal…