• RE: CN0287: Isolated 4-Channel, Temperature Measurement Circuit

    Hello,

    I'm trying to change the value of the AD5201 digitial pot on the board, however because the chip select is tied to P3 on the AD7193 I can't properly change the value on the AD5201.  What happens is that I write a SPI message to the AD7193…

  • CN0287原理图中是如何通过AD7193控制AD5201的?

    CN0287的参考电路里,AD7193和AD5201都是通过一个SPI总线连接的,AD7193有单独控制的CS引脚,AD5201的CS是由AD7193的GPIO控制的。

    这里就有个疑问,先选通AD7193,通过SPI发送命令,控制AD7193的P3口,拉低P3,这样AD5201就被选通了,可以发送SPI命令,控制其输出电阻。

    那么,如何将P3口拉高呢?如果还是通过AD7193发送SPI命令,这时,AD5201的片选其实仍处于有效状态,会将此时的SPI指令处理掉,这样AD5201就无法得到需要的电阻值了…

  • What is AD5201 used for?

    What is AD5201 used for?

     

    The AD5201 is used to change the exciting current for different type of RTD to
    generate a proper span to cover most of the dynamic range of AD7193 to get a
    better system performance.  For thermocouple, it could…
  • Questions Regarding AD5201 Evaluation Board?

    Hi All,

    I have a 1v8 25MHz square wave signal, what I want to do is get the same frequency but different voltage level square wave output. I want to use a digital controlled PGA or VGA, then I found ADL5201, I know my signal is kind of low to use this…

  • CN0287 limitations due to common SPI lines (AD5201 & AD7193)

    How to communicate with AD5201 on CN0287 ?
    - Enable and pull down P3 output on AD7193 is done
    - Send data via SPI to AD5201 (SPI bus shared with AD7193)
    - next step should be: Release or pull up P3 output on AD7193, but it is
    possible…
  • RE: AD8131 and AD9461

    Thank for your answer, ans sorry for my late reply.

    Yes, my analog signal is DC coupled (coming from a laser sensor) and will have a voltage swing of 0 to 1.8V.

    I working on implementing the AD9467 as you suggested with a AD5201, but i am confused on…

  • 如何提高AD7193的精度?

    现在按CN0287的参考图搭建的电路,现在可以轮流测量四路PT100电阻值(拿固定电阻代替)。

    不过返回来的值不是特别稳定。返回来24位数值,最后9位是跳动的。

    有什么办法能提高其稳定性呢?

    本来参考AD5201电位器分压这里这里应该输出1V,不过由于不知道怎么控制AD5201,于是就先用了固定电阻分压,是两个10K分了4.096V电压,运放输入那里基本上是2.048V。

  • [征文] IN118的基准源用AD的芯片,上面写着D6B,困饶我很久了 AD5312


    这个芯片(AD9833)的名字我猜的,可忽略看,如果是这个芯片,左看右看也不知是干吗呢?

  • RE: cn0287参考电路的疑问

    你好,我正好也在做这个项目,目前也遇到了些问题,也正在解决中。

    截图中的这段中文翻译其实是有歧义的,“开启ADG738”中的开启,在英文文档中是这样的“open”,应该是断开的意思。

    就是ADG738断开,ADG702闭合,这样运放就形成了一个电压跟随器,输出电压就是AD5201的编程电压。这个输出电压加在了Ref电阻上,也就形成了偏置电压。

    共勉。

  • ADI芯片辨识、型号查找

    看看截图: