• RE: AD628 single supply offset issue

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  • RE: Single supply operation of AD628 and AD8436

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  • RE: AD628 Vin limitation/timing vs Power supplies?

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  • RE: Does AD628 and AD629 have ESD protection at their inputs ?

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  • AD628 Gain error

    Hi

    I would like to know about AD628's Gain error.

    D/S revG P3 say Gain Error is +/- 0.1%

    Figure14 says max about 10ppm.

    These Gain Errors are same meaning?

    This spec has a big margin ?

    Regards

    moto

  • 我的AD628差分电路采错误电压的问题,困扰好几天了

    我用AD628进行差分采电压信号,T2和T3均为AD628。其中T2电路采到的IN+为13V到22V左右,IN-为2V,通过调节RX1,使得出来的电压信号基本为Uo=IN+IN-,很准确,但是T3的AD628相当于一个减法器使用,IN+为一个大约13到20V左右的电压信号,IN-通过分压电路得到一个10V的参考电压。这是通过调节RX2调节AD628的增益为1时,相当于一个减法器,但是在IN+小于16V时得到的输出信号一直为6.8左右基本不变化,但是当IN+为17V以上是,得到的out开始正常,为IN…

  • AD628 As Level Shifter

    Hello,

    I would like to use an AD628 to sample voltage in a 4-20mA current loop, but with a 0-3.3v output instead of the 0-5v output as depicted in the product datasheet.  I'm not sure about the purpose of the 210k resistor and 2.5v voltage source, and…

  • AD628在差分端无输入信号时,输出会逐渐下降到-0.3V。电路中的电阻分别是1M和2K,放大倍数500,总倍数50;

    如图为电路图,+IN和-IN之间接的是一个20毫欧的采样电阻,用以检测线路中的电流。输出接到PLC的AD输入端子上。

    在输入端未接入线路时,输出会在几秒内下降到-0.3V。实在想不出原因了。

    请AD工程师给予解答,谢谢了!

  • AD628 replacement

    Hello,

    I need to scale an IRIGB signal (+-10Vp) to my supply voltage (0-3.3V). I used AD628 (supply voltage 5V min) to scale this signal, but I don't have 5V anymore, could you give me some advice or an AD628 equivalent in 3.3V range ?

    Thanks in…

  • RE: 利用AD8436测量多通道220V,50HZ线电压

    谢谢回复!

    1.输入使用电压互感器PT,比如:,

    ZMPT101B ,可否?电流互感器CT,输入电源线需要引入圆孔,布板走线不方便;

    2.用上输入/输出buffer是否是如图:

    3.由于大于16路通道的测量,多路复用器是放在AD628的输入(红箭头所示)好还是AD628的输出好?