• AD5686R Output voltages are not as expected

    Using EVALAD5686R with ADuCM363 micro controller in SPI mode, with 2.5 reference voltage.
    DAC converted voltages are not as expected in few data point. Could you please suggest what might be going wrong?
    Below are the data

  • AD5686R Sample rate

    Hi, I would like to use the AD5686R (in combination with an FPGA) to generate 4 channels, each channel with an sample rate of 500KS/s.

    The SPI timing seems to suggest this is possible. At 50 MHz it takes 25 cycles (24 bits + 1 for the SYNC pulse) to send…

  • 咨询 AD5317R AD5684R AD5685R AD5686R 兼容性 谢谢

    4通道SPI接口的DAC: AD5317R (10bit)、  AD5684R (12bit)、 AD5685R(14bit)、  AD5686R (16bit)

    封装都用TSSOP16(RU-16)的。

    确认下:

    1 这种封装的,这4种器件是 pin-to-pin可以替换的,是吗?

    2 软件也是兼容的,只是精度不同,对吗?

    谢谢。

  • RE: Reference input AD5686R

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    Thank you,
  • RE: AD5686R/AD5685R/AD5684R transfer function error?

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  • AD5686R operation with GAIN=2

    Hi,

    Request your help to understand why the gain error is improving with Gain=2 compared to Gain=1?

    Also with Vref=2.5V & Gain=2, what should be the minimum VDD requirement to get output of 3V?

    I have seen Vref+1.5 as the minimum power supply required…

  • RE: How to program AD5686R Evaluation Board SPI using arduino mega 2560?

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  • AD5686R的输出有误差

    按照给的例程改的程序。

    有一块板子上有两个DA芯片,都多少有点问题。

    其中一个芯片,如,给A通道输出0.3V,B输出0.6V,C输出1V。

    在实际测试中,偶尔会出现B输出1V,C也输出1V的情况。一般出现之后,复位一到两次,就正常了。

    第二个芯片的主要问题是这样的,如给A通道0.1V,B通道0.3V,C通道0.808V。

    AB通道都正常,但是C通道输出偶尔会为0.819V。

    C通道不是所有的电压都会出错。比如C输出0.6225,再改变为0.6224,最后变为0.6227,不断循环输出这三个电压…

  • 关于AD5686R电源问题

            我使用了AD5686R芯片作为4路AD输出,,结果发现这块电路会导致我系统的3.3V电压升至3.6V,经分析,应该是这个片子的问题。

            我的电路如下,将Vlogic设计为3.3V,将电源供电VDD与增益GAIN设计为5V,这与参考设计不同,官方给出的参考电路图为Vlogic也是5V,请问我这样设计有什么问题么,谢谢!

  • 关于AD5686R的VDD电压与最大输出电压的关系

    我的配置是gain=2,寄存器内写入的值是FFFF,参考电压用的是内部2.5V。datasheet上说当gain=2时,VDD的范围是Vref+1.5到5.5,也就是说,我现在参考电压是2.5V,gain=2,只要VDD在4V到5.5V之间,最大输出就应该在5V,但是当我给VDD的电压是4.66V时,其写入值为FFFF时,电压却也是4.66V,虽然会有偏差,但是这偏的有点多了吧,麻烦能给我解释一下吗,这个偏差也是容许的吗?谢谢!