• AD623: FAQ

    FAQ

  • AD623: Output impedance

    Q

    What is the output resistance of the AD623ARM Instrumentation Amplifier?

    A

    The output is active and will be maintained as a low impedance by the action of
    internal feedback.

    If you need to work out the drive capability of the output, the AD623…

  • AD623: Low output maximum

    Q 

    Supply = +5V
    Vin+ to 10K to 0v(gnd), same node is output of detector(10k is detector load)
    Vin- to gnd, Vref to gnd
    Signal is +10mV +/- 300uV
    Rg = 100R+500Rpot
    22nF cap across Vin+/-
    Problem is that output is clipping at about 1.1V. Have tried…

  • AD623: Power on/off time

    Q

    We use an AD623ARMZ in an application in which the supply voltage +5V and -5V
    needs to be defined more precisely.
    What is missing in the datasheet of AD623 is the definition of the power supply
    slope rate for this amplifier.
    Can you please tell me…

  • AD623 instrumentation amplifier PCB guarding techniques

    Q 

    Can you give advice for implementing a good guard layout on the PCB for the
    instrumentation amplifier AD623?
     

     

    A 

    The good news is that we don’t need too much detail from you in order to help
    you, so it won’t be necessary to get any…

  • RE: AD623 unity gain, different results depending the length of Rg path?

    hi, 

    Thanks for your answer.

    my operating frequency is really at 500KHz ( and I already test until 1MHz) I noticed that the cut off is around 700KHz (-3dB). I don't understand why working at 500KHz is not recommanded for AD623.

    if you have another…

  • RE: The problems of AD623 used in right leg driven circuit

    Hi YuxiangRousi,

    Good day!
    Apologies we missed this email thread, in case you haven't figured out the issue with your circuit, we're here to help out.
    For this question, will it be okay to share the circuit diagram you used?  We may be able to spot…

  • AD623 input signal offset compensation

    I am using an AD623 with a MC33161 voltage monitor to monitor the temperature of a part.

    V_SET is around 1.1 V, V_ACT the current temperature monitor voltage being equal to V_SET when the temperature is reached.

    Reference voltage for the AD623 is 2.54V…

  • Problem with AD623 with datecode 2027

    I have a board that uses an AD623. See attached schematic

    The input voltage is 1.45V, the amplifier gain is 5.65, the output voltage is (1.45-0.97) * 5.65 = ~2.7V. Supply voltage is 5V

    The problem I see is that with devices with date code 2022 (Other…

  • RE: AD623 gain ecg

    This is an old thread, and perhaps nobody is looking at it any more. But Gustavo's answer doesn't quite make sense to me -- in all ECG applications that I know of, you measure the voltage *difference* between two electrodes. In that case, why wouldn't…