• AD7923 stops converting

    Hello,

    My ADC didn't work after a while.

    After replacing the ADC7923 it works for some minutes but than the DOUT goes TRISTATE during converting operation.

    see picture enclosed.

    SPI signals from FPGA seems of, on the oscilloscope picture enclused…

  • Any sample code available for AD7923?

    Any sample code available for AD7923, that could give complete picture for its operation?

  • 关于AD7923芯片的通信问题

    最近使用了AD7923这个芯片,SPI通信时,不能正常读取数据,利用示波器观察发现,DOUT引脚拉不了低电平,按规格书描述,DOUT会有2位低电平出来的.

       请问这是什么原因造成呢?有没有例程呢?

  • RE: How to set the control-register of the AD7923 correctly?

    Hi Marc

    have you tried sending the 0xCF90 only on the first transfer and then sending 0x0000 on subsequent transfers?

    What may be happening is that you are telling the AD7923 to start the sequence with every transfer. For the sequence to be worked…

  • [征文]+[ 转载]AD7923芯片的使用心得

    [征文]+[ 转载]AD7923芯片的使用心得

      近来,在制作脉冲信号参数测量仪的过程中,用到了ADI公司的芯片。该制作脉冲信号参数测量仪的要测量的参数有:测量脉冲信号的幅值、频率、周期、占空比、上升和下降时间等参数。它的基本功能如下:(1)脉冲信号幅值范围为:0.2VP5VP,测量精度≤±2%
    2)脉冲信号频率范围为:1Hz100KHz;频率测量精度≤±0.1%,周期测量精度≤±0.1%
    3)占空比测量范围为:10%~90%,测量误差≤10%;
    4)比较电平设置范围:0.2V5V,…

  • 请推荐几款A/D芯片

    请推荐几款A/D芯片,基本要求如下:

    通道数:不限
    输入范围:有0V-2.5V,也有0V-5V
    输入类型:单端输入
    位数:14位及以上,最好是16位
    工作原理:不限
    输出格式:不限
    速率:500Hz及以上
    封装:不要BGA,尽量不要QFN,其他不限
    价格:越低越好

    之前用的是AD7923,除了分辨率不够其他都能满足需求

  • RE: Unable to read multiple channels w IIO buffers

    Ok, I verified this with AD7923 and it works with multiple channels.

    However I don't understand the returned values. How should I match output value and the channel?

    In current test I have 3.3V on channel 0 and 0V on other 3 channels. iio_info correctly…

  • RE: AD7357 how to check the DC Accuracy in worst case condition

    Hi Kevin,

    I have attached some list of ADC that were Automotive Qualified. Do you have specific paramater that you are looking for an ADC? like Throughput rate, no. of channels, or Resolution.

    You can also visit the Analog Devices website and filter…

  • RE: threshold ADC conversion

    Hello,

    Using our selection table, you can find the ADC as per your needs.

    http://www.analog.com/ps/psthandler.aspx?pstid=10169&la=en

    We have number of multichannel ADCs with a throughput rate higher than 150KSPS and SPI interface. Some of them…

  • RE: AC Current Measurement

    Hi

    For 12 Bits, single channel SAR, look at AD7920, the AD7910 is the 10 bit version of this part.

    If you need more channels then look at AD7912 (2 channel) AD7923/7 (4 channel/8 channel).

    For a 12 bit sigma delta look at the AD7170.

    These devices…