• 关于ADE7858A使用的若干问题

    使用芯片过程中出现了一些问题,请教一下。

    1.各相空载时,读出来的频率和功率因数不是一个稳定的度数,而是一个不确定的值。这正常吗?

    2.必须在WTHR,VARTHR,VATHR寄存器之后设置空载值寄存器VANOLOAD,AONOLOAD,VARNOLOAD,无功电能累计才会有效,否则要么不累计,要么就是累计一个比较大的负数。(情况比较多,具体怎样设置会出现那种情况记不清了)

    3.手册上说的"数据存储RAM寄存器”启用写保护之前,"向队列内的最后 一个寄存器写入三次,以确保将其值写入RAM…

  • ADI 三相智能电表参考设计 ─ 基於ADE7858A和SIM900A(转贴)

         要想对风能、太阳能、水能等绿色清洁能源进行大规模开发、远距离输送和高效率利用以期切实改变全球能源格局,就必须将这些绿色能源转变为电能并通过一个集成先进的信息化、自动控制、储能、调度等技术的坚强智能电网对这些绿色电能进行集约化管理。而智能电表是构建智能电网的关键基础设施。因此,绿色能源的发展和智能电表的发展是密切相关的。我们紧跟绿色能源和智能电网的发展步伐,为智能电表行业提供高性价比的产品和优良的服务。基于上述的发展趋势和服务理念,我们准备了三相智能电表的参考设计。详细如附件.

  • ADE7858A测出来的有效值和实际值偏差有点大,原因何在?

    尽管ADE7858A有校验,但校验前测出来的有效值和实际值偏差有点大,目前找不到原因,希望知道的专家能给予指导,谢谢各位!

    具体数值如下:

           输入的实际电压有效值为228v,但从VRMS寄存器里得到的数值换算后得到的值为217,相差11V,貌似有点大啊,

    校验应该是在比较小的偏差情况下,进行校正。

    请高手指导!

  • Using Crystal with 16.00 MHz instead of 16.384 MHz in AD7858A

    Hi! I know that ADE7858A should be clocked via crystal with frequency from 16.22 MHz to 16.55 MHz. Could crystal with 16.00 MHz be used with ADE7858A? What will be happened with power measurements? Regards, Ivan

  • RE: ADE78××Eval

    Hi
    Capacitor withstand voltage is different on the evaluation board of ADE7758 / ADE7858A

    Evaluation board BOM,
    The ADE 7758 is 50 V withstand voltage,
    The ADE7858A has 16V withstand voltage

    Even with the ADE 7758, is it no problem…
  • Revenue grade metering IC

    Hi,

    Can I use ADE7858A IC for revenue grade metering (ANSI C12.20 Class 0.5).

    Regards,

    Vikram   

  • RE: ADE7880 or ADE7978 for Industrial panels power monitoring?

    Hi Eduartua

    Yes. You are correct in saying that for very large currents such as 1000A, shunts are not a good choice for current sensing. In that case, you can always go for CTs or Rogowski coils that support such current levels. Just make sure to not…

  • RE: Required 3-phase energy metering IC

    Hi Sai,

    For measureing a 3 phase system at 400Hz I would recommend using a part such as the ADE7858A or ADE7868A if you want to use CT's to measure the current. If you rather use shunts for the current measurement then I would recommend the ADE7978 with…

  • RE: 急,急,急 ADE7878 SPI通讯问题

    ADE7858A外部的晶振没有起振,但SPI的时钟是没问题,包括AVDD,GVDD,VREF,PM0,PM1上的电平都是正确的,但就是外部晶振没有起振,请问可能的主要原因是什么?更换过晶振,电容也是按指导要求配的。。。

  • RE: ADE7758 interface to Microcontroller through SPI

    Hi Panneerrajan

    Yes. In that case, you could use a potential divider (total resistance in the order of 10kohm or so) as well to do the same for the ADE IC 5V logic level outputs. If this is to make a utility grade energy meter, I would recommend going…