• AD7684: Stuck bits

    result b0 and b3 are always "0"

    I have 2 cards with that bug.

    Have you an idea or solution !?

     

    The majority of "peculiar problems" that we see with SAR ADCs (e.g. "stuck"
    bits among the LSBs, non-linearity) are…

  • CMRR of AD7683 and AD7684

    The AD7683 is pseudo differential input and AD7864 is true differential input.
    It is known that the pseudo differential input structure features less CMRR
    than true differential input structure. However, in the datasheet, the CMRR
    spec of the…

  • AD7684共模误差的事

    我用AD7684搭建了一款AD转换电路,我把输入(IN+和IN-)短路,共同连接到参考电源上(4V),读出来的数据为0x533而不是"0",再把输入短路后,重新共同连接到Ref/2的偏置电压上,读出来的值约为0x34,也就是说共模误差抑制好差,这是什么原因?我想AD7684原厂样品不会有问题吧,可是我也看不出电路上有什么问题,所以来请大家指教!谢谢!

  • RE: AD7684 issue (strange behavior)

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
  • AD7684数据读取问题

    AD7684按手册操作,DCLOCK经过5个下降沿之后,DOUT开始传输数据,但是MCU检测到DOUT一直为低电平,请问有没有遇见相同问题的,下面是驱动程序

    uint16_t read_ad7684(void)

    {

        uint8_t i;

        uint16_t dat=0;

        AD7684_CLK_H;

        AD7684_CS_H;

        delay_us(100);

        AD7684_CS_L;

        delay_us(100);

        for(i=0;i<6;i++)

        {

            

  • RE: AD7684 Pre-Processing-Best Methods Approach

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
  • RE: AD7684读取后转换成电压的问题。

    关于这个AD7684的电压转换问题,有没有具体的公式啊?最近被这个搞的头都大了。无论怎么搞都不行;下面是我的代码,麻烦高手赐教。谢谢!

    float read_ad7684(void)

    {

      uint read_addata=0,lv;

      uchar i;

      float date;

      ad7684_cs=0;//拉低片选

      _nop_();_nop_();_nop_();_nop_();

      _nop_();_nop_();_nop_();_nop_();

      for(i=0;i<5;i…

  • nasty midscale error with AD7684, 16-Bit, PulSAR® ADC

    Hi everybody,

    I'm evaluating AD7684 ADC with true differential input at

    5V supply and an external precision voltage reference of 4.096V.

    It is piggy back mounted to an existing board of a running

    series, firmware is adapted to its needs. Resolution…

  • AD7864: FAQs

    What is the meaning of the absolute input voltage

     

    The AD7864 is a replacement for the TI part ADS8321 so the product line has put
    the “Absolute Input Voltage” spec in the general specifications section of the
    datasheet (as in the…