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

    Hi,

    Are AD628 and AD629 able to survive to a 4kV ESD pulse of 1 to 3ns at their inputs ?

    Thanks

  • creepage and clearance for AD629 high common mode signals

    Hi,

    Could anyone offer me some advice regarding creepage and clearance distances when using high common mode input signals.

    I am using an AD629 which allows upto +-270v common mode voltage range.

    From initial checks on the net the suggested distance…

  • RE: OP177 SPICE model

    I knew the AD629 but not the newer AD8479.

    In fact my 2nd version is modelled after the AD629, which however has only +(-)270V common mode range. So for 350V with some headroom additional series resistors woud have to be used, reducing the overall gain…

  • Need help with AD629

    Hi, Guys

    I bought  some pieces of differential amplifier AD629  one month ago. I soldered AD629 on the pcb board I designed. But I can not get desired output voltage level. I connect a DC voltage to the input two pins of AD629 with "+" connected to pin…

  • AD629 Failure Due to Inputs

    We currently have an inverter that we are using the AD629 device to control a speed input of up to 9V (0-9V)

    We have are using a dual power supply +/-12V, ARZ package

    We have ruined a couple of these chips and the only difference is that sometimes the…

  • RE: AD629与AD8495的连接(或推荐一款可提高AD8495抗共模的芯片)

    滤波电路+AD8495的方案就可以了,不需要中间再加AD629了。直接接的话,热电偶的输入信号是作为差分信号直接接到AD8495的,如果像您那样将AD629加到中间的话,AD8495的输入就不是真正的差分了,所以有可能效果不好。

  • 用AD629在前端隔离干扰,放大mv级信号的问题

    大家好!

           在这里,我想请教大家一个问题。

           我参考电路笔记CN-0240,用AD629作为隔离运放,处理最大电压约为33mv的信号,放大100倍。

        

           http://www.analog.com/media/cn/reference-design-documentation/reference-designs/CN0240_cn.pdf

           由于信号来源在强电设备附近,旧方案没用AD629作为隔离运放,只是两级放大100倍,不时出现烧主控芯片的问题。加了AD629之后,就没有出现这个问题了…

  • What is AD629 behaviour if max. CM voltage exceeded?

    What is AD629 behaviour if max. CM voltage exceeded? I have tested some samples
    of the AD629 and found that operating at the upper voltage extremes the output
    no longer became predictable.

    Effectively I am working with 270V+ at the current…
  • 关于差分放大器为什么能在高共模电压下工作的提问

    大家好,为什么有些差分放大器可以工作在很高的共模电压条件下,比如说AD629就可以工作在正负290V的共模电压下,是因为芯片内部有特殊处理的电路吗?

  • AD629图33的一个问题

    大家好!

    我在查看ad629的datasheet时发现图33中最终给出的输出是OUTPUT = Vout - Vref,我自己推导的结果是

    OUTPUT = Vout + 0.99Vref,相当于OUTPUT = Vout + Vref,这里应该是加还是减呢?